LOCTITE 246 – Medium-Strength High-Temperature Threadlocker
LOCTITE 246 is a one-component, medium-strength anaerobic threadlocker developed for locking and sealing threaded metal fasteners. It cures when confined between close-fitting metal surfaces in the absence of air, forming a durable bond that helps prevent loosening and leakage caused by shock and vibration.
The product is particularly suitable for demanding threaded assemblies exposed to vibration, mechanical stress and elevated temperatures. Its thixotropic consistency helps reduce migration or running after application, allowing the product to remain where it is dispensed.
Once cured, LOCTITE 246 provides medium-strength retention while allowing normal disassembly using standard hand tools for servicing and maintenance.
Key Features
- Medium-strength threadlocking performance
- Suitable for threaded metal fasteners
- Helps prevent loosening caused by shock and vibration
- Helps seal threaded connections against leakage
- High-temperature-resistant formulation
- Can normally be removed using standard hand tools
- One-component product requiring no mixing
- Anaerobic curing technology
- Thixotropic consistency helps prevent running after application
- Blue, opaque liquid for easy identification
- Fluoresces under ultraviolet light to support inspection
- 50 ml bottle
Typical Applications
LOCTITE 246 is intended for locking and sealing threaded metal fasteners in demanding mechanical assemblies, including:
- Bolts and threaded fasteners
- Transmission assemblies
- Machinery and industrial equipment
- Equipment exposed to vibration and mechanical shock
- High-temperature threaded assemblies
- Maintenance and repair applications requiring future disassembly
Henkel specifically identifies heavy-duty applications such as bolts used in transmissions, construction equipment and railway assemblies.




















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