Loctite® 290 is a medium to high strength threadlocker designed for locking and sealing preassembled fasteners. Its low viscosity allows it to wick into threads by capillary action, eliminating the need for disassembly prior to application. It prevents loosening and leakage from shock and vibration and is ideal for sealing porosity in welds, castings, and powdered metal parts.
Loctite® 290 is a one-component, anaerobic adhesive that cures in the absence of air between close-fitting metal surfaces. It is specifically formulated for locking and sealing threaded fasteners that are already assembled. The product’s low viscosity enables it to penetrate between engaged threads, making it suitable for applications where disassembly is not practical. Once cured, it provides a medium to high strength bond that resists vibration, shock, and leakage. Loctite® 290 is also effective in sealing porosity in welds and castings, enhancing the integrity of metal components.
Colour: Green
Viscosity: 20 to 55 mPa·s at 25°C
Breakaway Torque: 10 N·m (M10 steel bolts)
Prevail Torque: 29 N·m (M10 steel bolts)
Service Temperature Range: -55°C to +150°C
Fixture Time: 20 minutes on steel
Full Cure Time: 24 hours
Fluorescence: Yes, under UV light
Recommended for: Steel, stainless steel, and brass
Packaging Sizes: 10 ml, 50 ml, 250 ml bottles
Primary Chemistry: Methacrylate ester
Wicking grade allows for post-assembly applications
Prevents loosening due to vibration and shock
Seals threads to prevent leakage and corrosion
Suitable for metal fasteners up to M12 in size
Fluorescent for easy inspection under UV light
Requires heat for disassembly
Fasteners loosening due to vibration
Leakage through threaded assemblies
Corrosion in threaded metal components
Difficulty in applying threadlocker to preassembled parts
Porosity in welds and castings leading to leaks
Securing preassembled fasteners in instrumentation and electrical connectors
Preventing loosening of set screws and adjustment screws
Sealing porosity in welds, castings, and powdered metal components
Locking threaded fasteners in pumps, gearboxes, and presses
Preventing leakage and corrosion in threaded assemblies
Applications requiring post-assembly threadlocking without disassembly
Maintenance and repair operations in industrial equipment
Automotive and heavy machinery threaded components
Electrical and electronic equipment assemblies
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