What type of thread locker to use? (Best solution)

LOCTITE® Green Threadlocker is recommended for locking preassembled fasteners, e.g. electrical connectors and set screws. The product is categorized as medium-to-high-strength for wicking. It is also available in a liquid form, cures in 24 hours and can be removed with heat and hand tools.

  • Use Medium strength thread lockers for critical joints that may only rarely need disassembly. High strength thread lockers are for permanent bonds. Disassembly will only be possible through a combination of high heat and power tools.

How do I choose a thread locker?


  1. Strength. • Low Strength (Purple): Ideal for fasteners <1/4" (6 mm).
  2. Viscosity. • Liquid Formulas: Everyday assembly; ideal for fine threads and blind holes.
  3. Application Methods.
  4. Materials Being Assembled.

What are the different types of thread lockers?

The most common are: Purple (light duty), Blue (medium strength), Red (high strength), and Green (penetrating low-high strength). The strength of the locker required depends of a few factors, you need to know how the fastener will be used down the road.

Should I use Loctite red or blue?

Loctite threadlocker blue is designed to easily be replaceable with common tools, whereas red is a more permanent fix. For parts that need a more permanent hold, like structural bolts in a home, auto suspensions and frames, or any other heavy machinery, Loctite Threadlocker Red 271 is the answer.

What can I use as thread lock?

Superglue and nail polish as threadlocker alternatives are two of the most common, often quoted as effective replacements for dedicated threadlockers. Using these two products can indeed lock a fastener in place in the short term.

How do I choose a Loctite threadlocker?

Generally speaking, the larger your thread, the higher the strength your threadlocker needs to be. For example: Small thread – LOCTITE® 222 is suitable for small threads up to a maximum size of M12. Medium thread – LOCTITE ® 243 seals and secures fasteners with a maximum thread size of M18.

What is threadlocker blue used for?

Loctite Threadlocker Blue 242 is designed for the locking and sealing of threaded fasteners which require normal disassembly with standard hand tools. The product cures when confined in the absence of air between close fitting metal surfaces.

Is there a green Loctite?

LOCTITE® Green Threadlocker is recommended for locking preassembled fasteners, e.g. electrical connectors and set screws. The product is categorized as medium-to-high-strength for wicking. It is also available in a liquid form, cures in 24 hours and can be removed with heat and hand tools.

Are there different types of Loctite?

It is available in either a semisolid anaerobic or liquid form, and once applied to the threads it will cure in 24 hours. Common versions are: Loctite 262, Loctite 268, Loctite 271, and Loctite 272.

Do you have to use thread locker?

Do I Need Threadlocker? By far, the best reason to use a threadlocker solution is to prevent the accidental back off of fastener assemblies due to vibration. While not necessary in all applications, solutions can also be used any time a nut and bolt are placed together.

How strong is red Loctite?

Loctite Red (262): High Strength Threadlockers.

Is permanent Loctite really permanent?

Loctite Threadlocker Red 271 is designed for the permanent locking and sealing of threaded fasteners. The product cures when confined in the absence of air between close fitting metal surfaces. It protects threads from rust and corrosion and prevents loosening from shock and vibration.

Can you remove red Loctite?

The cured red LOCTITE® product can be removed with a combination of soaking in a solvent and mechanical abrasion such as a wire brush.

What is a substitute for Loctite?

Registered. The non-toxic, traditional (retrogrouch) threadlocking alternative to Loctite is beeswax. Steal a bit from a beeswax candle, or buy a lump from your local beekeeper, or order some online. Also works fine for finishing off cables, instead of solder or an end cap.

Can you use Gorilla Glue on threads?

The Gorilla Glue company has been well-known for their waterproof polyurethane glue, wood glue, heavy duty tapes, and other similar products. Still, it greatly surprises me that Gorilla Glue is now making threadlocker.

The Difference Between Red, Blue, Green and Purple Threadlockers

Have you ever been perplexed as to which threadlocker to use? Do you know what the distinctions are between the threadlockers in the colors red, blue, green, and purple? You are not alone in asking this question — we at Henkel hear it a lot, and we’re here to inform you the difference between the two. Products from our company are available in a variety of grades to accommodate a wide range of applications, ranging from vehicle and boat maintenance to a wide range of home product repair. The different grades of threadlocker are color-coded to make it easier to differentiate one threadlocker from another.

The red bottle is really a registered trademark of LOCTITE ®.

LOCTITE ®Red Threadlocker

LOCTITE ® Blue Threadlocker is a medium-strength threadlocking agent. Once again, this product dries completely in 24 hours and may be dismantled using simple hand tools when curing is complete. Additionally, LOCTITE®QuickTape 249TM Threadlocker is available in both a liquid and a semisolid form. This threadlocker is the first and only one of its kind on the market. A primerless grade blue threadlocker is also available in a variety of colors. You might also be interested in the following:Blue Threadlocker Fundamentals

LOCTITE ®Green Threadlocker

LOCTITE ®Green Threadlocker is suggested for securing preassembled fasteners, such as electrical connections and set screws, in their respective positions after assembly. When it comes to wicking, the product is classified as medium-to-high strength. Also available in liquid form, it cures in 24 hours and is easily removed with heat and hand tools.

LOCTITE ®Purple Threadlocker

The LOCTITE ®Purple Threadlocker, also known as the LOCTITE ®222TM, has quickly established itself as one of our most popular items. The cure time for LOCTITE ®222TM is 24 hours. A low-strength metal such as aluminum or brass can also benefit from the application of this technique. This provides the user with a great deal of versatility. When & Why to Use Purple Threadlocker contains user testimonials as well as further information on our purple threadlocker.

All LOCTITE ®Threadlockers

All LOCTITE ®Threadlockers have a wide temperature range of -65°F to 300°F, with some being capable of withstanding temperatures as high as 650°F. Threadlockers were the first product line developed by LOCTITE®. They are made up of a sophisticated combination of chemistry and engineering. Simply explained, this product is an anaerobic glue that is applied to the threads of fasteners by dropping drips onto the threads. It then hardens into a strong thermoset plastic, which serves to secure the threads in place.

Red or blue, we’ve got the right threadlocker for you!

Have you become perplexed by the many threadlockers available?

It will explain the fundamental distinctions between red and blue threadlockers as well as provide application and removal instructions. Download our helpful guide now. Regardless of the job, we’ll get you set up with the finest Loctite threadlocker available.

What’s the difference between red and blue Loctite threadlocker?

It is the primary purpose of threadlockers such as Loctite to prevent fasteners from leaking or loosening as a result of vibration. The distinction between red and blue threadlocker comes down to the strength and removability of the threadlocker. Loctite threadlocker blue is intended to be quickly replaced with ordinary hand tools, whilst Loctite threadlocker red is intended to be a more permanent repair. If you’re having difficulties remembering what you’re supposed to be doing, here’s a rhyme to assist you out: “Blue is a color that is simple to recreate.

It’s ideal for motorized and nonmotorized parts that require periodic maintenance, such as automotive parts (oil pans, water pumps, and so on), as well as motorized yard equipment, bicycles, furniture, and a wide range of other items.

In comparison to the blue threadlocker, this industrial grade threadlocker packs a greater punch and can only be removed by heating the parts to 500 degrees Fahrenheit.

Threadlocker application techniques

Both red and blue Loctite threadlockers are applied in the same manner using the same application technique. Here’s what you’re supposed to do.

  1. Check to see that all nuts and bolts are clean and free of oil or debris. Both surfaces must be completely clean in order to achieve maximum bonding strength. Apply a few drops of Loctite threadlocker to the threads of the bolt where the nut engagement region is to be located. The threadlocker doesn’t have to be applied all the way around the bolt. Once the nut has been tightened, the product will spread out around the bolt and form the sealing ring. Tightening the nut to the appropriate point and allowing for cure time (complete cure in 24 hours)

Threadlocker removal

The method for removing threadlocker differs based on the sort of threadlocker you’re working with. Using standard tools, remove the bolt and nut from the Loctite threadlocker blue application. Loctite Threadlocker Red 271 is created to be a high strength thread locker, which means that it will take the application of targeted heat from a blowtorch to break the binding between the threads. Here’s how to go about it. You’ll need the following supplies:

  • The method for removing threadlocker differs based on the sort of threadlocker you’re working with. Using standard tools, remove the bolt and nut from the Loctite threadlocker blue installation. As a high strength thread locker, Loctite Threadlocker Red 271 will need the application of targeted heat such as that produced by a blowtorch to weaken the connection. As an example, consider the following. You’ll need the following items to complete this project.
  1. Put on your safety glasses and heat-resistant gloves and heat the fastener for 2-3 minutes with the blow torch, rotating the torch around to ensure that all sides are heated. Remove the nut using a hand wrench when the blowtorch has been turned off.

Know-How Notes: Threadlocker Guide

Torque is the primary driving force underlying the tightening of fasteners. The higher the torque applied to a fastener, the better the retention, depending on the type of fastener employed. That isn’t always enough, and you may want a little further assistance to ensure that the fastener remains in the proper position and does not come free. Nuts and bolts can become loose over time as a result of vibration, heat and cold cycles, and stress. That problem will be resolved by including threadlocker in the mix, but which one should you use?

What Is Threadlocker?

Threadlocker is an anaerobic sealant (it does not need the presence of oxygen) that is used to join fasteners. Essentially, it is a nut and bolt adhesive that has been specially formulated. It is not just the threadlocker that holds the fastener together; it is also the threadlocker that seals the threads, ensuring that air, water, and chemicals do not enter the joint and create rust, corrosion, or leaks. During the first installation, it also serves as a thread lubricant, allowing for more precise torque application.

The most often encountered colors are purple (for mild duty), blue (for medium strength), red (for strong strength), and green (penetrating low-high strength).

Keep in mind that the color of the bottle does not correspond to the color of the locker; it is quite simple to mistakenly grab a blue bottle for a blue locker if the labels are not clearly visible.

Color Key

Purple– This is the lightest-duty threadlocker that is currently on the market. It is intended for light-duty, low-strength fasteners that must be removed on a semi-regular basis, such as screws. Torque between 50 and 55 foot pounds is often necessary to break the bond. This category contains little fasteners that are generally less than 1/4″. Generally speaking, blue threadlocker is the most frequent strength and may be used on any fastener that will need to be removed at some time in the future, but which requires the use of a threadlocker such as suspension, braking, or chassis components.

  1. It is not necessary to use heat in order to break the seal.
  2. Threadlocker in the color blue is said to have “removable strength.” Red high-strength threadlocker should be used when you really do not want this bolt to come loose.
  3. That does not rule out the possibility of loosing the bolt or nut, but it will take 275 ft lbs to break the seal in this situation.
  4. High-temperature lockers are effective up to 450 degrees Celsius, and ultra-high-strength lockers are effective up to 650 degrees Celsius.
  5. It is available in a variety of strengths.
  6. Generally speaking, green is available in medium intensity.
  7. Sleeve retainer is another another anaerobic sealer from the green series.
  8. It is most commonly used to seal engine sleeves, but it also works well for sealing non-moving tubes such as the return hoses on power steering pumps and other similar applications.
  9. The application of threadlocker is simple; a small dab will do the trick.
  10. ” data-medium-file=” data-large-file=” loading=”lazy” src=” alt=”Applying threadlocker is simple; a little dab will suffice.” data-medium-file=” data-large-file=” loading=”lazy” src=” The medium strength of this gel-type locker is a gel-type locker.
  11. The medium strength of this gel-type locker is a gel-type locker.
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“width: 800 pixels, height: 600 pixels data-lazy-src=” srcset=” data-lazy-src=” data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7″> The threadlocker can even be applied, dried, and then reinstalled (depending on the formulation), like in the case of this oil filter adapter for an LS engine oil pan seen here.

Don’t stress about memorizing anything; if you get stuck, you can always refer back to our threadlocker tutorial for clarification.

For routine maintenance and repairs, you may turn to one of our 17,000 NAPA AutoCare stores, which are conveniently located throughout the country.

CategoriesKnow HowTagsadhesive,bolt,chemicals,fasteners,hardware,nut,screws,stuck bolts,threadlocker,tool box,toolsCategoriesKnow HowTagsadhesive,bolt,chemicals,fasteners,hardware,nut,screws,stuck bolts,threadlocker,tool box,tools

Jefferson BryantView All

Jefferson Bryant has been a gearhead his whole life and spends more time in the shop than anyplace else. His career in the automobile audio industry began as a shop manager, and he finally worked his way up to a position as a product designer at Rockford Fosgate. He began writing technical pieces for publications in 2003, and he has been working as an automobile writer for the past ten years. His art has appeared in several publications, including Car Craft, Hot Rod, RodCustom, Truckin’, Mopar Muscle, and others.

Jefferson owns and maintains Red Dirt Rodz, a personal garage studio in which he produces all of his magazine articles and technical films for the internet.

Red, Blue or Purple: How to Choose A Loctite® Threadlocker

Low strength (purple): This is the best choice for fastening. 1/4″ is a standard measurement (6 mm). Hand tools are sufficient for disassembly. On 1/4″ to 3/4″ thick walls, medium strength (blue) is designed to be removed using ordinary hand tools with regular hand tools (6 mm to 22 mm) fasteners High Strength (Red): Designed to provide high strength on fasteners ranging from 1/4″ to 3/4″ (6 mm to 22 mm) in diameter. It is possible that removal will necessitate the use of high-temperature hand tools (550°F/260°C) and disassembly while still hot.

2. Viscosity

Fine threads and blind holes are no problem for liquid formulas, which are used for everyday assembly. Semisolid Formulas are convenient to carry around in your pocket and are great for overhead applications. Tape formulation: convenient for carrying in a pocket; regulated application: can be applied many days before assembly.

3. Application Methods

Pre-Applied: QuickTape threadlocker can be applied to bolts that are ready to be assembled before they are actually assembled. Before Assembly: The majority of LOCTITE ®liquid threadlockers are designed to be applied at the time that the components are to be joined, rather than after assembly has begun. A Wicking Grade Formula can be used to pieces that have already been assembled after they have been wicked.

4. Materials Being Assembled

All LOCTITE ®threadlockers have the following features: Applications using metal-to-metal contact Plastic-to-plastic and plastic-to-metal applications are assured with LOCTITE ®425 Assure.

Difference between Red and Blue Loctite Threadlocker?

The majority of home mechanics like working on their equipment, but the absence of professional experience frequently puts them at a disadvantage. The vast majority of them are unable to operate threadlockers. Fasteners should have a drop of threadlocker added to them to prevent them from loosening over time as a result of vibration. Additionally, it prevents liquids from leaking out or leaking in through threaded holes. However, one issue that is frequently asked is: What is the difference between Blue and Red Loctite threadlocker?

Redloctite is used for a more permanent hold on pieces that will not be loosening for many years to come, such as a bolt.

It is more likely that a home mechanic will require a medium-strength Blue Loctite 242 or 243 threadlocker in addition to Red loctite than the opposite is true.

Fasteners such as car suspension linkages, steering columns, chassis bolts, brake rotors, and bolts supporting the metal frame of a building structure, among other things, benefit from the use of a Red Loctite 271.

While fasteners made of blue Loctite may be readily removed, fasteners made of red Loctite need the use of a blow torch to heat the region surrounding the bolt to around 500 degrees Fahrenheit. For this reason, red loctite should never be used on plastic components.

How to Apply Threadlocker?

If you’re already using threadlocker, you’re already one step ahead of the vast majority of home mechanics who don’t. However, in order to achieve appropriate bonding, you must ensure the following three things: 1) Clean the Nuts/Bolts/Screws: The threads of fasteners should be free of debris and grease to ensure proper function. It only takes a few sprays of parts cleaner and a quick wipe down with a towel to complete the job. 2) Only a drop or two of loctite is required: You only need to apply a drop or two of loctite to the threads of the bolt to complete the job.

3) Allow for a 24-hour curing period: Because the loctite is in liquid form, it will take approximately 24 hours to dry and cure completely.

Use scenarios for various colors of threadlockers are illustrated in the following examples.

How to remove Threadlocker?

For fasteners that are secured with blue threadlockers, a standard hand tool is adequate. The fasteners should be quite simple to remove. The crimson threadlocker necessitated the use of a blowtorch. Light the blow torch and hold it over the bolt and the area surrounding it for 2 to 3 minutes, depending on how large it is. Using a hand tool, loosen it from the base and it should come out rather easy.

What are different types/colors of Threadlockers?

In terms of color, threadlockers are available in four main hues: green, red, blue, and purple. The threadlockers Loctite, Permabond, and Permatex all have the same color code, which makes it easy for us to determine which threadlocker to use for which application. Loctite Threadlockers are a kind of threadlocker. Green: The green threadlocker is fairly thin and flows smoothly into small cracks and crevices that are difficult to access with other threadlockers. The use of this method is advised for preassembled fasteners, such as those used in electrical connections, and set screws that are designed to sit flush with the item they are screwed into.

  1. It is a threadlocker with a medium to high tensile strength.
  2. Red: As previously stated, red threadlocker is a high strength threadlocker.
  3. As a result, it should only be utilized for portions that are unlikely to be opened in the near future.
  4. Blue threadlocker: The blue threadlocker is the most often used threadlocker.
  5. For those of you who don’t have any threadlocker in your toolset, Blue 243 loctite is a good place to start.
  6. Purple threadlocker is classified as a low strength bonding threadlocker because of its color.

Use this on mild metals like as aluminum and brass to get the best results. If you are concerned that applying excessive tension to the bolt would cause damage to the threads or head, low strength threadlocker is the best choice in this circumstance.

What’s the difference between Loctite 242 and Loctite 243

The Loctite 243 is an enhanced version of the Loctite 242, which was previously available. It is more resistant to grease and has a greater tolerance for rough surfaces. It may be utilized for a variety of applications, including rocker studs, oil sump, brake calipers, pulley assemblies, fork suspension drain bolt, and so on.

What is blue Loctite used for?

Blue loctite is a medium strength threadlock that may be used for a variety of tasks. Whenever in doubt, this is the threadlocker that you should use. It keeps bolts from loosening as a result of vibration, and it also keeps rust from squeezing the fasteners.

What is the strongest Loctite threadlocker?

Red Loctite is the most powerful threadlocker available in their line. Before dismantling the fastener, you’ll most likely need to heat the place where it’ll be installed. Siddharth has always had a strong interest in automobiles and motorcycles. He was the type of kid who carried about the current issue of Auto magazine in his schoolbag at all times. A professional racing driver was his ambition, and he set himself the goal of achieving it. And then there was the year 2012, when he found himself competing as a novice driver in the Polo R Cup national racing championship.

Siddharth Sharma’s most recent posts are shown below.

Thread-locking fluid – Wikipedia

A bottle of Loctitethread-locking fluid is also included. Bolts that have been treated with thread-locking fluid Thread-locking fluid, also known as threadlocker, is a thin, single-component glue that is applied to the threads of fasteners such as screws and bolts to prevent loosening, leakage, and corrosion from occurring. In most cases, methacrylate-based thread-locking formulations are used, and they rely on the electrochemical activity of a metal substrate to trigger polymerization of the fluid.

Thread-locking fluid isthixotropic.

Strength and whether they may be removed easily or if they require heat to be removed are typically indicated by color coding on the labels of brands.


Thread-locking fluid (Loctite) comes in a bottle. Button bolts that have been treated with thread-locking fluid Thread-locking fluid, also known as threadlocker, is an adhesive that is applied to the threads of fasteners such as screws and bolts to prevent loosening, leakage, and corrosion. Generally, methacrylate-based thread-locking formulations are used, and the electrochemical activity of a metal substrate is used to produce polymerization of the fluid. Thixotropic thread-locking fluid has the ability to flow well over time while still exhibiting good shock and vibration resistance; this property allows it to flow well over time while maintaining good shock and vibration resistance.

If it is removable, it can be done so by using heat, for example. If it is permanent, it can’t be done so. Strength and whether they may be removed easily or if they require heat to be removed are typically indicated by color coding on labels.


Thread-locking fluids are often methacrylate-based and cure anaerobically, as is the case with thread sealants. Thread-locking fluid is an athixotropic fluid, which means that it displays a time-dependent drop in viscosity when subjected to shear stress. This permits it to flow well over time while still exhibiting resistance to short-duration shearing, such as that caused by vibration or stress. A modest amount of thread-locking fluid (about one teaspoon) is commonly offered in a tiny container in quantities ranging from 5 millilitres (about one teaspoon) to 250 millilitres (8.5 US fl oz).

Typical properties of thread-locking fluids

Type Typical color code Torque to break free (3 ⁄ 8-16(9.53 mm) size bolt) Torque to continue turning Temperature range
Low strength ■Purple 7N⋅m(62in-lb) 3 N⋅m (27 in-lb) −54 to 149 °C
Medium strength ■Blue 12 N⋅m (115 in-lb) 6 N⋅m (53 in-lb) −54 to 149 °C
Medium strength surface insensitive ■Blue 20 N⋅m (180 in-lb) 7 N⋅m (62 in-lb) −54 to 149 °C
High strength ■Red 25 N⋅m (230 in-lb) 25 N⋅m (225 in-lb) −54 to 149 °C
High temperature ■Red 20 N⋅m (180 in-lb) 30 N⋅m (270 in-lb) −54 to 232 °C
Penetrating ■Green 10 N⋅m (90 in-lb) 35 N⋅m (310 in-lb) −54 to 149 °C
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Application and care

Most thread-locking fluids are based on methacrylates and cure anaerobically, which is the most common type of cure. It is an athixotropic fluid, which means that when subjected to shear stress, it displays a time-dependent reduction in viscosity. Despite the fact that it has excellent long-term flow characteristics, it is nonetheless resistant to short-duration shearing, such as that caused by vibration or shock. It is commonly offered in tiny containers containing between 5 millilitres (about one teaspoon) and 250 millilitres (about a cup and a half) of thread-locking solution (8.5 US fl oz).


  • Mike Allen and Allen, Mike (September 2009). “How to Secure Bolts Using Threadlocker: Auto Clinic” is a video tutorial on how to secure bolts using threadlocker. Most Popular Mechanics
  • Current Loctite Threadlockers
  • Threadlocker
  • Threadlocker, and so forth.

What’s the Difference between Colors of Loctite Threadlockers?

It is possible to use Loctite Threadlocker for a broad number of applications, ranging from vehicle maintenance to the repair of everyday home items. Engineers have been grappling with the problem of vibrational loosening for a long time. Loctite is the solution. Mechanical locking mechanisms such as split washers or nylon nuts were utilized in the conventional manner of securing the nut. With them comes a new set of problems, one of which is the loosening of joints under vibration. The lack of thread sealing, the need for vast quantities of various shapes and sizes, and the susceptibility to rust are among the other disadvantages of this product.

Each variety, which is distinguished by four different hues, comprises a particular grade of ingredients that are best suited to the task at hand.

All of the bottles are red, with the only difference being the varied colored markings and a brief explanation on each of them.

You’re probably wondering why Loctite is considered the gold standard of threadlockers.

Loctite Purple (222): Low Strength Threadlockers

The Loctite Purple is a color that is on the lower end of the color spectrum. This strength is ideal for fasteners that are smaller than 6mm in diameter. It is ideal for threading all metals and is particularly effective on low-strength metals that are prone to fracture, such as aluminum.

Assembling and adjusting screws, including set screws, will be possible using hand tools if the grade is appropriate for your needs. Calibration screws, meters, and gauges are all excellent candidates for Loctite Purple application. The whole cure time is around 24 hours.

Loctite Blue (243): Medium Strength Threadlockers

The Loctite Blue color is the next color on the spectrum. Besides being ideal for all types of metal threading, it is also a medium strength adhesive. Machine tools and presses, pumps and compressors, mounting tools, and gear boxes are all excellent candidates for use as general purpose threadlockers. This strength is excellent for fasteners up to a diameter of 20 mm. Loctite Blue has even been demonstrated to be capable of dealing with small contamination of industrial lubricants. And, despite the fact that the strength is medium, it still allows for disassembly using hand tools.

Loctite Red (262): High Strength Threadlockers

A medium- to high-strength adhesive, Loctite Red is a great choice. This general purpose threadlocker will fluoresce when exposed to ultraviolet light, allowing for quality control and monitoring to be performed. It is compatible with all metal fasteners, much like the other Loctite items on this list. Loctite Red is resistant to minor contamination by industrial lubricants and is perfect for avoiding any migration of the adhesive from the adhesive surface. In the event that you want a permanent assembly, this grade will be ideal for your project requirements.

Loctite Red will hold any threading that is up to 27mm in diameter or bigger in diameter.

Loctite Green (294): Penetrating Threadlockers

The last product on the list is the Loctite 294 fluorescent glue, which is a high strength dark green fluorescent adhesive. Loctite claims that it works best between “engaged threads” because of the capillary action and low viscosity of the product. One advantage of this grade that distinguishes it from the others is that it does not need the disassembly of the component before applying the adhesive. It also works well with fasteners that have been oil coated. Loctite Green is a kind of adhesive that may be removed using heat and hand tools.

With this grade of Loctite threadlockers, any threading up to 14mm in diameter can be utilized.

Loctite Threadlockers – General Information

The Loctite threadlockers that have been previously mentioned are all liquid adhesives that are labeled with particular numbers. There are several other quantities and types of adhesives available. With them, the color-coded description is still in effect. While liquids are more typically utilized, sticks that look similar to glue sticks can also be used as an alternative. No matter whether type of Loctite threadlocker is used, all of them provide high-quality performance in locking and sealing threaded fasteners, with a cure time of 24 hours or less.

It is critical to have the greatest tools for the task, no matter what type of project you are working on.

Loctite threadlockers hold in place what is needed and do not loosen even when subjected to vibration.

It’s finished as soon as the seal is applied. It may be possible to disassemble the assembly using heat and hand tools, depending on the grade of glue used. However, with a Loctite threadlocker, you may rest assured that your metal-on-metal application is safe.

Threadlocker Solutions – How and When Do I Need To Use It

There are particular numbers assigned to each of the Loctite threadlockers, which were previously explained. Various other adhesives are available in various amounts and varieties. Color descriptions continue to be used in conjunction with these. While liquids are more typically utilized, sticks that look like glue sticks can also be used as an alternative. Whichever kind of Loctite threadlocker is used, they provide high-quality performance in locking and sealing threaded fasteners, with a cure time of 24 hours or less.

It is critical to have the greatest equipment for the work, no matter what the project is.

Vibration does not release the Loctite threadlockers since they are designed to do so.

It may be possible to disassemble the structure using heat and hand tools, depending on the grade of glue used.

Choosing The Correct Threadlocker

Despite the fact that threadlocker is a wonderful tool for securing fasteners, there are a number of things that should be considered before using it. The following are the considerations you should make before purchasing and applying threadlocker solution to your fasteners:

  1. Hold Strength – Some solutions can only provide a slight grip, but others can create a very powerful (and tough to remove) hold that is difficult to remove. It is critical to understand whether you will be required to remove the fastener once again before putting
  2. Conditions That Affect Performance – The temperature of the threadlocker solution is the most important factor to consider when evaluating its performance. Assuming you are working in a hot setting, be certain that the solution you are using is capable of withstanding the high temperatures. Strong vibrations can cause fastener assemblies to release even when they are coated with a solution
  3. If the fastener assemblies do not have sufficient hold strength, they will loosen. When the solution comes into contact with harsh substances, the solution may degrade as a result of this contact. It is important to use a threadlocker solution that has been tested for chemical resistance if the threadlocker will be exposed to chemicals.

Do I Need Threadlocker?

Using a threadlocker solution is recommended for a variety of reasons, the most important of which is to avoid the unintentional back off of fastener assemblies caused by vibration. Even though solutions are not always required in all instances, they may be employed each time a nut and bolt are assembled together. Any time an assembly will be subjected to strain or vibration that might result in unintentional back-off, as well as in instances where the assembly will not be examined for an extended length of time, we recommend utilizing a threadlocker solution to secure the threads.

Frequently Asked Questions

What exactly is a LOCTITE? For maintenance, repair, and production applications, LOCTITE is the preferred brand for adhesives, sealants, and surface treatment solutions in the industry. Invented over 66 years ago with a unique liquid resin that hardens in the absence of air, LOCTITE solutions assist to improve the reliability of machines and assemblies, allowing man and machine to achieve their full potential. What is a thread locker, and how does it work? Vibration-induced self-loosening of nuts and bolts can be prevented with the use of threadlocker, a chemical liquid that is applied to the threads.

  1. If you useLOCTITE threadlockers on a bolt and tighten the nut on it, the liquid spreads out to cover all of the micron-sized gaps between the nuts and bolts, unitizing them and making them resistant to being loosed.
  2. What is the mechanism through which threadlocker operates?
  3. LOCITE threadlocker works by spreading the liquid adhesive evenly between the nut and bolt and then hardening into a thermoset plastic in the absence of air and the presence of metal ions, thereby locking the nut and bolt together.
  4. What is the best way to repair galled threads?
  5. Threadlockers LOCTITE threadlockers, when used prior to assembly, guarantee that there is no galling by providing appropriate lubricity in the threads.
  6. Threaded joints that are leaking can be repaired with LOCTITE thread sealants.
  7. What is the best way to get LOCTITE loose?

Is it possible to remove Loctite threadlockers?

Loctite threadlockers with low strength can be removed by applying an aloosening torque that is greater than the tightening force on the threadlocker threads.

How can we tell whether or not LOCTITE threadlocker has been applied to the nut and bolt in a visually visible manner?

When you remove a bolt, you can immediately tell whether or not LOCTITE threadlocker has been applied by the presence of white powder on the bolt head.

Is there a LOCTITE threadlocker that may be of assistance?

With LOCTITE 290, which is the highest grade of LOCTITE threadlocker, you can lock the nuts and bolts that would normally be impossible to reach for application with other threadlockers.

Is it possible for LOCTITE threadlockers to move and jam other parts?

LOCTITE threadlockers are thixiotropic in nature, which means that they do not tend to flow to other portions of the threadlocker.

Because LOCTITE threadlockers are liquid, they will cause a mess during the application, which our operators will find objectionable.

A drop-by-drop application is made possible by the use of a nozzle with LOCTITE threadlockers.

If there is any leakage, it may be readily cleaned up since, as long as LOCTITEthreadlocker is exposed to air, it will remain a liquid and will not cure at all until exposed to heat.

Is there a LOCTITE threadlocker that may be of assistance?

In addition, several high strength threadlockers are available that can lock fasteners that are both large and resistant to intense vibration.

Why don’t LOCTITE threadlockers cure within the bottle if they can cure in the absence of oxygen, as they claim?

Air-permeable polyethylene bottles allow air to travel through the wall between the two bottles’ walls.

As a result, a 50 ml box of LOCTITE includes 50 ml adhesive in a significantly bigger container than the 50 ml pack.

The fixture time is the amount of time it takes for the glue to provide initial handling strength to the locked/sealed components after they have been locked or sealed.

When does the cure begin?

Is it possible to utilize a threadlocker for non-threaded assemblies, such as locking bearings on bushings in housings or on shafts, rather than threaded assemblies?

When it comes to such applications, retaining compounds such as LOCTITE 638 are typically recommended; nevertheless, threadlockers and retaining compounds are chemically identical, meaning that they are both anaerobics.

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Is it permissible to employ anaerobics in which one or both pieces are made of plastic?

It is advisable to use cyanoacrylates in such situations.

In the case of two sections that fall under the category of ‘inactive surfaces,’ we recommend that you apply primer first.

Inactive surfaces include, for example, plated metal components, stainless steel, galvanized steel, and anodized aluminum, to mention a few examples of materials.

Can LOCTITE threadlockers be used on components that have been treated with oil?

LOCTITE 243 can be used on oil-impregnated components since it is effective at cutting oil and locking it in place.

What is breakaway torque, and how does it work?

Now we can break the bond with a torquewrench; the torque required to break the bond is referred to as the breakaway torque.

As a result, the breakaway torque alone provides us with the strength of the threadlocker.

When we apply threadlocker to a bolt, we finger tighten the nut down and leave it for 24 hours to allow the threadlocker to cure completely.

Following the breakage of the bond, we proceed to move the nut around by four quarters (360°), which gives us with the current torque value in the system.

What is breakloose torque, and how does it work?

The breakloose torque is defined as the torque at which the nut may be completely removed from the bolt.

Various causes such as vibration, side sliding, and other factors have been shown to cause a loss of up to 30 percent of the torque applied to the components over time, which has been calculated.

Allow us to consider the following example: the assembly was given a tightening tension of 10 Nm.

There is a 3 Nm reduction in tightening torque as a result of the vibrations.

In contrast, by using a threadlocker, your assemblytightened at 10 Nm will have a total torque of (10+5) 15 Nm and, even with a 30 percent loss, it would open at 12 Nm, which is more than the torque you used to tighten it.

The right method of using LOCTITE threadlockers for blind hole applications is described below.

If it is simply applied to the malethreads and torqued down, air pressure will drive the majority of the product out of the assembly while it is being assembled.

Yes, heat can aid in the speeding up of the healing process.

Strength will be reduced to some level as a result of this trade-off, which will be discussed further below.

What is the best way to determine how much threadlocker I need to use?

How can I choose the most appropriate threadlocker for my specific needs?

Simply enter your needs, and the tool will return to you with the most appropriate solution for your situation.


Do Loctite products contaminate the fluid media in which they are used?

As a result, there is no contamination.

What is the best way to determine whether LOCTITE thread sealant is compatible with the fluid?

Please double-check the Fluid Compatibility Chart for the fluid in question.

LOCTITE anaerobic thread sealants should not be used with fluid media such as oxygen, according to the manufacturer.

Please get in touch with us if you require further information.


To dismantle a joint that has been sealed using LOCTITE thread sealer, follow the steps below.

If that is not enough, employ localized heat up to 250 degrees Celsius and disassemble while it is still warm.

In addition to the threadmaterial, thread size, and temperature, LOCTITE thread sealant cures at a different rate.

It is advised that Primer 7649 or Primer 7471 be used for quicker curing requirements.

Will the LOCTITE thread sealants make a sloppy mess throughout the course of the operation because they are liquid?

Additionally, LOCTITE thread sealants are supplied with a nozzle to allow for accurate application on the joint engagement region of the joint.

Even if there is some excess threadsealant coming out of the nozzle, you should be able to wipe it off easily because as long as LOCTITE threadsealant is in touch with air, it will continue to be a liquid and will not cure.

When working with inactive thread surfaces such as stainless steel, aluminum, plated surfaces, and other similar materials, it is highly suggested to utilize Primers 7649 or 7471 to guarantee a full seal.

Which thread sealant is the most effective for use with plastic joints?

The difference between a threadlocker and a threadsealant is explained here.

Threadlockers are used to lock and seal threaded components in order to give greater locking strength.

There are several types of thread sealants available, some of which are liquid and others which are thick paste.


There are no fillers or particles in these liquid sealants, therefore there is no need to be concerned about clogging the filtering system or contaminating system fluids with filler particles while using them.

This situation calls for the use of liquid sealants, which perform well.

LOCTITE gasketing compound may be applied directly to the flanges and then both flanges can be glued together in a single step.

You may see a video on how to apply for a job at this link – We seek a gasket that has the ability to endure extremely high pressures.

Yes, LOCTITE Anaerobic Gaskets can withstand pressures of up to 34.47 N/mm2 when properly installed.

Is it possible to use Loctite Gasket in the event that the gaps between the flanges are very large?

Simply wipe the flange surfaces and apply LOCTITEAnaerobic Gasket Dressing on both sides of a new pre-cut gasket to complete the installation.

How many different types of materials may be utilized with LOCTITE gasketing compounds?

The type of sealant used for a certain application is determined by the material to be sealed, the climatic conditions, the temperature, and the operating pressures present in the system.

What methods may be utilized to get rid of them?

We need to seal a gasoline system for safety reasons.


LOCITE Anaerobic Gaskets are resistant to gasoline and petroleum-based liquids such as diesel fuel.

When employed to seal fluid systems, they are both far superior to regular silicones, which expand and lose their sealing capabilities when in contact with the fluid.

To dismantle the flanges that have been sealed with LOCTITE GasketingCompound, just use hand tools and clean the flange surfaces with LOCTITE SF 790 Chisel Gasket Remover, as directed by the manufacturer.

It is 0.025 mm to 0.08 mm for thinner goods (low viscosity) such as LOCTITE 603 andLOCTITE 609, and it is 0.05 mm to 0.1mm for thicker products (high viscosity) such as LOCTITE 638 and LOCTITE 648 to get the best fit.

Surface roughness of cylindrical components should be in the range of 0.8 micron to 3.2 micron, according to the manufacturer’s recommendations.

When it comes to applying LOCTITEretaining chemicals, what is the proper approach to follow?

Apply to both pieces of a tight/close fitting assembly with minimal clearance if the clearance is critical.

Will the LOCTITE retention compound also act as a joint sealant?

Is it possible for LOCTITE holding compounds to move and clog other parts?

LOCITE holding compounds are thixotropic in nature, which means that unless a shear force is provided, they will remain viscous at room temperature for long periods of time.

Is it necessary to use a Primer in conjunction with a LOCTITE retention compound?

These metals are deficient in the iron or copper content, and as a result, in the metallic ions that are necessary to completely cure the product in 24 hours.

When all or at least one of the parts is made of an active metal, however, there is no need to employ a primer to assure complete cure, which is typically achieved within 24 hours at room temperature.

To remove an assembly that has been installed with LOCTITE retention compound, just take the assembly away mechanically from the rest of the assembly.

We need to preserve a worn shaft while also locking it into a housing or bearing, which might be difficult.

Is it possible to find a solution to this problem? Yes. Shafts with radial gaps smaller than 0.5 mm can be locked with the help of the LOCTITE 660 retention compound. The restoration of a poorly worn shaft can be accomplished with the help of LOCTITE Superior Metal.

Chemical Threadlocker Basics

Performance of split lock and star/toothed washers, as well as fastener alternatives such as self-locking nuts, has been competent but not always extraordinary over the years, according to industry standards. The technology available has evolved in tandem with the passage of time. To increase production and profitability in today’s demanding and competitive climate, savvy shop owners and technicians take use of the most recent advancements in equipment, techniques, and software. Enter Threadlockers Over the last few years, chemical threadlockers have witnessed a significant rise in usage, both on assembly lines and in service bays.

  • When compared to mechanical threadlockers, the most notable advantage of chemical threadlockers is that they give superior torque retention.
  • They can become less elastic as a result of heat, vibration, and time, resulting in the fastener becoming loose.
  • When they solidify, they form a durable plastic that holds the entire fastener in place.
  • Additionally, not only does this prevent vibration loosening, but it also keeps out moisture, dirt, and other impurities that might cause corrosion and damage the integrity of the completed joint.
  • In a similar vein, soft materials such as aluminum and other alloys, as well as the plastic-like materials utilized in today’s automobiles, can compress with time if not properly maintained.
  • “Size Does Make a Difference” “Thanks to advancements in threadlocker chemistry, we’ve been able to produce several formulations that are suitable for a wide range of fastener sizes and kinds in a number of applications,” says Seferi.
  • Typical bolt sizes for water pumps and other accessories are 5/16″ or M8, hence the torque specification for such fasteners would be a moderate 20 foot-pounds, or around 27 Nm, in order to avoid damage to the fasteners.
  • However, a structural fastener on a truck chassis can be 3/4″ or even an inch in diameter, and it is doubtful that it will be removed throughout the vehicle’s expected service life.

It’s important to note that, while a high-strength threadlocker performs admirably, disassembly will almost certainly necessitate the use of specialized tools and procedures, as well as the application of heat, whereas assemblies utilizing low- and medium-strength threadlockers typically necessitate the use of standard hand tools for disassembling.

Typically, fasteners up to 1/4″ or 6 mm in diameter are used.

It has a high level of vibration resistance.

Exceptionally strong threadlocker — Recommended for assemblies that are intended to be permanent, or nearly so, such as flywheel and engine block bolts, truck bed mounting bolts, axle bolts and nuts, as well as fasteners for heavy construction equipment.

Recommended for fasteners bigger than 3/4″ in diameter (20 mm).

As an illustration, think of the bolts that hold valve covers or cam covers together.

A compound that’s great for sealing freeze plugs/core plugs in engine blocks and cylinder heads is available, as is a threadlocker that has a wicking composition that allows it to flow readily into difficult-to-access threads and fasteners that have already been joined.

There are several locations on today’s automobiles where fasteners and fittings must retain fluids and, as a result, might benefit from the addition of additional sealing materials.

As has happened in the past, the tape has warped or slipped out of position during installation, or shredded or ripped while in use, resulting in the same leaks that were intended to be prevented.

Thread sealants are the preferable option in this situation.

For example, thread sealants with PTFE for standard-duty applications are available, as is a high-performance thread sealant that can withstand up to 10,000 psi.

A hydraulic/pneumatic sealant designed specifically for high-pressure systems, valves, and fittings, as is a high-temperature sealant for applications up to 400 degrees Fahrenheit (204 degrees Celsius).

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