Loctite 242 Threadlocker(bottle)

The Dependable Blue Threadlocker for General Industrial Use

Loctite 242 is a single-component, blue liquid dimethacrylate ester formulation that cures anaerobically between mated metal threads. It prevents vibration loosening, locks against leakage in thru-holes, and protects threads from corrosion all without permanently welding the fastener in place. That last point matters: medium strength threadlocker means standard hand tools are all you need to disassemble the joint when maintenance comes around. With a thixotropic viscosity of 800–1600 mPa·s, the product stays in place after application without migrating into surrounding components. UV fluorescence allows easy verification of application under blacklight, which is particularly useful in quality control environments. Loctite 242 has been tested to Mil-S-46163A and ASTM D5363 standards credentialing that matters in defense, aerospace, and OEM manufacturing contexts.

Chemical Resistance and Thermal Performance

One of the often-overlooked advantages of Loctite 242 is its chemical resistance profile. The cured threadlocker maintains 100% of its initial strength after 1000 hours of exposure to motor oil at 125°C, brake fluid at 22°C, and leaded gasoline at 22°C. Unleaded gasoline and DEF/AdBlue exposure show 95% retention making it well suited for automotive, agricultural, and transport applications. Thermal stability is rated to 100°C with extended testing showing reliable performance over 5000 hours. Breakaway torque on 3/8×16 steel fasteners reaches 7.9–17 N·m after 24 hours, with prevail torque in the range of 2.8–6.8 N·m — a balance that reassures both assembly integrity and maintainability. For plated surfaces, cadmium and zinc substrates have been tested and show adequate performance, though an activator such as SF 7471 or SF 7649 may be recommended on challenging substrates.

Buy Loctite 242 Threadlocker from Tapemart

Tapemart stocks Loctite 242 in multiple pack sizes to suit individual workshops and industrial maintenance operations alike. As an authorized Loctite distributor, we guarantee authentic product with full manufacturer support. If you're comparing Loctite 242 vs 243 or looking for medium duty thread lock adhesive online, our team can help you make the right choice based on your substrate, environment, and performance requirements. Visit Tapemart to buy Loctite 242 online and get it delivered to your door across India.