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Looking for a reliable solution to keep fasteners secure? Loctite threadlockers offer industry-leading performance for preventing loosening due to vibration, thermal expansion, and shock. Explore the full range of types and strengths tailored for your application needs.
Loctite threadlocker products prevent self-loosening and secure any threaded fastener against vibration and shock loads. Completely filling the gap between mating threads, each Loctite threadlocker permanently secures threaded assemblies and eliminates fretting corrosion. Browse their full range below.
Find the right threadlocker for your application.
Low strength Loctite threadlockers are typically applied to adjustment screws, calibration screws, meters, and gauges, which undergo frequent disassembly and can be removed using hand tools.
Medium strength Loctite threadlockers are suitable for machine tools, presses, pumps, compressors, mounting bolts, and gearboxes, where disassembly occurs with normal frequency and can be done using hand tools.
High strength Loctite threadlocker products are employed in more permanent assemblies such as heavy equipment, suspension bolts, motor and pump mounts, cap bolts, and studs. These applications rarely require disassembly and may require localised heat for effective removal.
Loctite threadlockers are liquid adhesives designed to secure fasteners from loosening between maintenance cycles. At Loctite, the threadlocker has become widely known as the “red bottle” due to its distinctive look.
When fasteners loosen, this can cause serious accidents and a total shutdown of a production plant. Loctite threadlockers add an extra level of protection by defending against improper tightening, shocks and vibration, thermal expansion and corrosion.
Unlike conventional fastening methods such as double nuts and spring washers, Loctite threadlockers maintain clamping force, fill all gaps and provide an air-tight seal.
Professionals across industries trust Loctite threadlocker products for their ability to maintain clamp load under extreme vibration, prevent corrosion, galling, and fretting, and secure threaded assemblies without damaging components. Depending on the strength selected, these threadlockers also allow for easy disassembly using standard hand tools. Whether you require a low, medium, or high strength solution, each Loctite threadlocker type is engineered to deliver dependable, long-lasting performance in critical applications.
To get the best results, start by cleaning your fastener threads to remove oil and debris. Choose the right Loctite threadlocker type—low, medium, or high strength—based on how permanent the bond should be.
Apply a small amount to the threads, assemble, and tighten. Allow time to cure before use. Loctite threadlockers are available in liquid and stick forms, with special options like green wicking-grade for preassembled fasteners.
For detailed application tips and best practices, refer to our Loctite Threadlocker Application Guide.
Loctite 2400 threadlocker is a medium strength adhesive, suitable for all metal threaded assemblies. It is formulated to secure and seal bolts, nuts and studs to prevent loosening due to vibration. It works on all metals and passive substrates and can tolerate slight contamination by industrial oils, corrosion prevention oils and cutting fluids.
This product carries no hazard symbols and does not contain any declarable carcinogens, mutagens or reproductive toxins.
Loctite 2700 threadlocker is a high strength adhesive designed for the permanent locking and sealing of threaded fasteners to prevent loosening due to shock and vibrations. It is ideal for applications where disassembly is not required and cures on all metals, including passive substrates.
This product carries no hazard symbols and does not contain any declarable carcinogens, mutagens or reproductive toxins.
New trends in metal substrate composition and in anti-corrosion coatings have emerged over the past decades(s) which create challenges and opportunities for anaerobic adhesive products.
Of significance is the increased prevalence of zinc flake coated parts in the market. This paper studies the performance of a selection of Loctite anaerobic threadlockers on GEOMET zinc flake coated fasteners and demonstrates how this type of anti-corrosion coating differs from traditional metal substrates—and what this means for Loctite threadlocker performance.
In particular, the performance of two new anaerobic threadlocking products, Loctite 2400 (medium strength) and Loctite 2700 (high strength), is examined. These new grades have excellent health and safety labelling and have been specifically designed for optimum cure on zinc flake coated fasteners.