Loctite® 241 is a medium-strength, low-viscosity, anaerobic threadlocker designed for the locking and sealing of threaded fasteners that require normal disassembly with standard hand tools. It cures in the absence of air between close-fitting metal surfaces, preventing loosening and leakage from shock and vibration. The adhesive is particularly effective on less active substrates such as stainless steel and plated surfaces.
Colour: Blue
Viscosity: 100 to 150 mPa·s (Cannon-Fenske #300)
Breakaway Torque: Approximately 11.5 Nm (M10 steel bolts)
Fixture Time: 12 to 240 minutes, depending on substrate
Full Cure Time: 24 hours
Service Temperature Range: -55°C to +150°C
Specific Gravity: 1.06
Fluorescence: Yes, under UV light
Recommended for: Steel, stainless steel, brass, and plated surfaces
Packaging Sizes: 50 ml bottles
Primary Chemistry:
Methacrylate ester
Loctite® 241 is a one-component, anaerobic adhesive formulated for the locking and sealing of threaded fasteners. Its low viscosity allows for easy application and penetration into small threads up to M12. The product cures in the absence of air between close-fitting metal surfaces, forming a durable bond that resists loosening due to shock and vibration. Loctite® 241 is particularly effective on less active substrates such as stainless steel and plated surfaces and can cure through light coatings of industrial oils and cutting fluids without the need for prior cleaning. The adhesive exhibits temperature resistance up to 150°C, ensuring long-term reliability in demanding environments.
Colour: Blue
Viscosity: 100 to 150 mPa·s (Cannon-Fenske #300)
Breakaway Torque: Approximately 11.5 Nm (M10 steel bolts)
Fixture Time: 12 to 240 minutes, depending on substrate
Full Cure Time: 24 hours
Service Temperature Range: -55°C to +150°C
Specific Gravity: 1.06
Fluorescence: Yes, under UV light
Recommended for: Steel, stainless steel, brass, and plated surfaces
Packaging Sizes: 50 ml bottles
Primary Chemistry:
Methacrylate ester
Prevents loosening of threaded fasteners due to shock and vibration
Eliminates the need for mechanical locking devices
Seals threads to prevent leakage and corrosion
Reduces maintenance by providing reliable locking and sealing
Enables reliable assembly without the need for prior cleaning of lightly oiled surfaces
Ideal for locking and sealing threaded fasteners that require normal disassembly
Suitable for use in applications where medium-strength threadlocking is desired
Effective on less active substrates such as stainless steel and plated surfaces
Can be used on assemblies with light oil contamination without prior cleaning
Applicable in maintenance and repair operations in industrial equipment
Suitable for automotive and heavy machinery threaded components
Useful in electrical and electronic equipment assemblies
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