Stop the Loosening with Loctite® Threadlockers

Lock fasteners against vibration, corrosion, and heat

From delicate electronics to heavy industrial equipment, Loctite locks threads and helps reduce unplanned downtime.

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Loctite
 
Authorized Henkel Loctite Distributor
 
Backed by Applied® Technical Support

Why Maintenance Teams Trust Loctite

The original anaerobic threadlocker, engineered for industrial reliability across every fastener size and grade.

50+
Years of Innovation
Loctite pioneered the original anaerobic threadlocker
3
Strength Grades
Purple low, blue medium, red high strength
100%
Anaerobic Cure
Cures to a tough, solid state on contact with metal

Threaded fasteners loosen because of side-sliding and shifting between the threads, not because they untwist. Loctite anaerobic threadlockers fill the clearance, cure to a solid, and stop the side-shift that causes vibration loosening.

The result: longer service intervals, fewer repeat repairs, and one product family that covers everything from delicate electronics to heavy industrial equipment.

Applied® stocks the full Loctite lineup at service centers across North America.

Industry Applications

Heavy Industrial Equipment
Electronics Assembly
Automotive & Fleet
Manufacturing
Energy & Utilities
Food & Beverage
Mining & Aggregates
Construction Equipment
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Loctite threadlocker applied to industrial threaded fastener
Threaded fastener assembly secured with Loctite
Need help choosing? Browse full Loctite lineup Find a service center Talk to a specialist
POPULAR LOCTITE THREADLOCKERS

Pick the Right Grade for Your Application

Loctite color codes tell you the strength at a glance. Purple for low, blue for medium, red for high, plus a wicking grade for locking fasteners after assembly.

Loctite 242 Threadlocker, medium strength, blue
MOST POPULAR
HENKEL LOCTITE · MEDIUM STRENGTH

Loctite 242 Threadlocker

The everyday medium-strength blue threadlocker. Sized for 1/4" to 3/4" fasteners, it locks against vibration and seals against corrosion. Removes with standard hand tools when service is needed.

Medium Strength Blue 1/4" to 3/4" Hand-Tool Removable
Stocked at Applied® service centers
Loctite 262 Threadlocker, high strength, red
HENKEL LOCTITE · HIGH STRENGTH

Loctite 262 Threadlocker

High strength red threadlocker for permanent assemblies. Use on critical bolts that must not loosen.

High Strength Red 1/4" to 3/4"
In Stock
Loctite 222 Threadlocker, low strength, purple
HENKEL LOCTITE · LOW STRENGTH

Loctite 222 Threadlocker

Low strength purple threadlocker for fasteners under 1/4". Easy disassembly for adjustment screws and small fasteners.

Low Strength Purple Under 1/4"
In Stock
Loctite 290 wicking threadlocker, 50ml
HENKEL LOCTITE · WICKING GRADE

Loctite 290 Threadlocker

Wicking-grade green threadlocker that penetrates already-assembled threads by capillary action. Locks and seals fasteners after assembly.

Wicking Post-Assembly Green
In Stock

How Do I Use Loctite Threadlocker?

Apply to clean threads, let it cure, then disassemble when needed. Three steps separate Loctite from mechanical lock washers and split rings.

1 Apply to clean threads
2 Let it cure
3 Disassemble when needed
How to Use
How to use Loctite threadlocker, step-by-step guide
Dispensing Options
Loctite threadlocker dispensing options
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Loctite Threadlocker FAQs

Quick answers to the questions maintenance teams ask most.

Blue (medium strength, like Loctite 242) holds firmly but releases with standard hand tools. Red (high strength, like Loctite 262) is designed for permanent assembly and requires localized heat at 550°F (260°C) to release. Use blue for serviceable joints and red for fasteners that should never loosen.
Most Loctite threadlockers are formulated for metal-to-metal applications. For plastic-to-plastic or plastic-to-metal assemblies, use Loctite 425 Assure. It is a plastic-safe wicking grade that locks the fastener without cracking plastic components.
Handling strength develops in about 10 minutes, with full cure in 24 hours. Cure activates when threads engage and air contact is lost. Apply, assemble immediately, and let the joint sit undisturbed during the cure window.
Use purple (low strength, Loctite 222) for fasteners under 1/4". Use blue (medium strength, Loctite 242) for 1/4" to 3/4" fasteners that may need to come apart for service. Use red (high strength, Loctite 262) for 1/4" to 3/4" fasteners that must never loosen, accepting that removal requires heat.
Yes. Apply Loctite to clean, dry threads for full cure and reliable holding strength. Oil, coolant, or contamination on the threads slows the cure and reduces the final bond.
Wicking-grade Loctite (such as Loctite 290) is designed for post-assembly application. It penetrates already-assembled threads through capillary action and cures in place. Standard liquid grades should go on the threads before assembly.
Loctite 243 threadlocker being applied to a threaded fastener
Authorized Henkel Loctite Distributor

Invented 50 Years Ago, Trusted Worldwide

Loctite Corporation, now part of Henkel, invented the anaerobic threadlocker fifty years ago. The technology changed threaded assembly reliability and remains an industry standard. Applied® carries the full Loctite lineup at service centers across North America.

  • Original anaerobic adhesive technology, invented by Loctite
  • Henkel-backed and the industry standard since invention
  • Stocked at Applied® service centers across North America
  • Application support from Applied® specialists to match the right grade to your job
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Loctite in Action

See how Loctite threadlockers solve real threaded fastener problems on the shop floor.

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DISCLAIMER: The above content is provided by the supplier. Applied® does not guarantee the accuracy or timeliness of the content.
The above content is provided “AS IS”, AND ANY AND ALL EXPRESS AND IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ARE HEREBY EXCLUDED.
All warranties, if any, are solely from the supplier.

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