Locktite

How To Choose A Locktite Threadlocker

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 (Red): Designed to deliver high strength on 1⁄4" to 3⁄4" (6 mm to 22 mm) fasteners. For removal, it may require localized heat (>550°F/260°C), hand tools, and disassembly while hot

Viscosity

Liquid Formulas: Everyday assembly; ideal for fine threads and blind holes
Semisolid Formulas: Pocket-friendly, ideal for overhead applications
Tape Formula: Pocket-friendly; controlled application; can be pre-applied several days before assembly

Application Methods

Pre-Applied: QuickTape threadlocker can be applied beforehand on bolts that are waiting to be assembled
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

Materials Being Assembled

All LOCTITE® Threadlockers: Metal-to-metal applications
LOCTITE® 425 Assure: Plastic-to-plastic, plastic-to-metal applications