Loctite® 259 is a low-strength, low-viscosity, anaerobic threadlocker designed for the locking and sealing of threaded fasteners that require easy 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.
Colour: Purple
Viscosity: 100 to 140 mPa·s at 25°C
Specific Gravity: 1.05
Breakaway Torque: Approximately 6 Nm (M10 steel bolts)
Fixture Time: 10 minutes on steel
Full Cure Time: 24 hours
Service Temperature Range: -55°C to +150°C
Fluorescence: Yes, under UV light
Recommended for: Steel, stainless steel, brass, and plated surfaces
Packaging Sizes: 50 ml bottles
Primary Chemistry:
Methacrylate ester
Loctite® 259 is a one-component, anaerobic adhesive formulated for the locking and sealing of threaded fasteners. Its low viscosity ensures easy application and penetration into threads. 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® 259 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: Purple
Viscosity: 100 to 140 mPa·s at 25°C
Specific Gravity: 1.05
Breakaway Torque: Approximately 6 Nm (M10 steel bolts)
Fixture Time: 10 minutes on steel
Full Cure Time: 24 hours
Service Temperature Range: -55°C to +150°C
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 easy disassembly
Suitable for use in applications where low-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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