Loctite® 242 is a medium-strength, medium-viscosity threadlocker designed to lock and seal threaded fasteners that require disassembly with standard hand tools. It cures in the absence of air between metal surfaces and offers strong resistance against vibration and shock, making it suitable for a wide range of industrial applications.
Loctite® 242 is a one-component, anaerobic adhesive that forms a durable, vibration-resistant bond on threaded metal fasteners. Its medium viscosity and thixotropic formulation prevent adhesive migration after application, ensuring clean and precise use. It is ideal for use on less active metals such as stainless steel and plated finishes, and is compatible with fasteners that may have light oil contamination. Loctite® 242 offers reliable performance up to 150°C and cures fully within 24 hours.
Colour: Blue
Viscosity: 800 to 1,600 mPa·s
Breakaway Torque: Approx. 11.5 Nm (M10 bolts)
Prevail Torque: Approx. 5.2 Nm
Fixture Time: 5 to 20 minutes
Full Cure Time: 24 hours
Service Temperature Range: -55°C to +150°C
Specific Gravity: 1.1
Fluorescence: Yes
Recommended Substrates: Steel, stainless steel, brass, plated surfaces
Packaging Sizes: 10 ml, 50 ml, 250 ml, 1 L
Primary Chemistry: Methacrylate ester
Medium strength allows removal with standard tools
Prevents loosening from vibration and shock
Works on passive metals like stainless steel
Cures through slight oil residue on parts
Suitable for vertical and overhead applications
Fluorescent under UV light for quality inspection
Service temperature up to 150°C
Prevents fasteners from loosening in high-vibration environments
Eliminates the need for mechanical locking methods
Seals threads to prevent corrosion and leaks
Reduces maintenance caused by unsecured joints
Allows disassembly without damaging threads
Threaded assemblies requiring controlled, removable strength
Medium-strength threadlocking for maintenance and repair
Components in pumps, gearboxes, and machinery
Effective on passive metals and slightly oily surfaces
Vertical or overhead fastener installation
Suitable for automotive and general industrial use
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