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RED, BLUE OR PURPLE: HOW TO CHOOSE A LOCTITE® THREADLOCKER


Invented 50 years ago by Loctite Corporation, now Henkel Corporation, this revolutionary method to lock and seal threaded fasteners with liquid anaerobic adhesives has found worldwide acceptance. Suited for a wide range of applications, from delicate electronic components to heavy industrial equipment, LOCTITE® threadlockers have dramatically increased the reliability of threaded assemblies.

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" (6 mm to 22 mm) 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

2. 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

3. 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

4. Materials Being Assembled

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


Once you know how to choose, then learn how to use:



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