Traditional fastening methods leave gaps.

LOCTITE threadlockers fill them.

Mechanical locking devices (such as split washers, nylon nuts, flat washers) were invented to solve the common problem of loosening that happens in most threaded assemblies. The reality is that they don’t maintain clamp load as assemblies “locked” with these devices often loosen under vibration, thermal expansion and/or improper torque.

Don’t let a little fastener become a big problem

Why Threaded Assemblies Fail

Benefits of Using LOCTITE® Threadlockers

  • Prevents unwanted movement, loosening and leaks
  • Resist vibration loosening
  • Single-component - clean and easy to apply
  • Can be used on all sizes of metal fasteners - reduce inventory costs
  • Seals threads - allow through-hole tapping

A threadlocker is a single component liquid or semi-solid adhesive. They cure at room temperature to a hard solid thermoset plastic when applied between steel, aluminium, brass and most other metal surfaces. They cure in the absence of air. The adhesive completely fills the gaps between mating threads to lock threads and joints. 

Red or Blue? How to Choose a LOCTITE® Threadlocker

How to Choose a LOCTITE® Threadlocker

When choosing a threadlocker, there are four things to consider:

1. Strength

  • Low Strength (Purple): Ideal for fasteners <1⁄4" (6 mm). Easy disassembly using hand tools
  • Medium Strength (Blue): Designed to be removable with standard hand tools on 1⁄4" to 3⁄4" fasteners
  • High Strength: Designed to deliver high strength on 1⁄4" to 3⁄4" (6 mm to 22 mm) fasteners. For removal, it may require localised heat (>550°F/260°C), hand tools, and disassembly while hot

2. Viscosity

  • Liquid Formulas: Everyday assembly; ideal for fine threads and blind holes
  • Semisolid Formulas: Pocket-friendly, ideal for overhead applications

3. Application Methods

  • Pre-Assembly: Most LOCTITE® liquid threadlockers are designed to be applied at the moment that parts will be assembled
  • Post-Assembly: Wicking grade formula can be applied on parts that are already assembled

4. Materials Being Assembled

  • All LOCTITE® Threadlockers: Metal-to-metal applications

Learn More

How to Disassemble Fasteners Assembled with LOCTITE Threadlockers

LOCTITE threadlockers will reliably lock and seal threaded fasteners.  But what happens when you want or need to take apart a threadlocked assembly?  LOCTITE liquid threadlockers also provide for reliable disassembly – so you can take it apart when you want to.  The key is to start with the right grade of threadlocker for your needs: low to medium strength products can be disassembled with hand tools; high strength products require localized heat and then hand tools.

LOCTITE® Success Stories

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Contact us

Please fill out the form below and we will contact you as soon as possible. For immediate technical assistance please call us at the following number

01442 278100  

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