Purpose and Specifications

LIQUI MOLY 3801 Screw Retainer Medium Strength is a reliable threadlocker that locks screws, bolts, and nuts up to 3/4 inch in place, preventing them from loosening due to vibrations, shocks, or stress. This 10g bottle delivers fast-curing protection that seals threads against leaks, works on oiled surfaces, and resists fuels, oils, water, and brake fluid.

Key practical benefits include operation from -60°C to +150°C for extreme hot or cold conditions, medium strength for easy disassembly with hand tools when needed, and suitability for all common metals including steel, aluminum, and stainless. One bottle secures hundreds of fasteners, lasting years under normal use with a shelf life of up to 2 years unopened.

When to Use / Replace?

• Use on engine mounts, brake calipers, belt tensioners, or any vibrating parts to avoid come-loose failures every 50,000+ km.
• Ideal for automotive repairs where screws must stay tight through daily driving stresses; reapply during disassembly or if threads show wear.
• Replace retainer if fasteners loosen after 12-24 months of heavy use, or during routine maintenance at 100,000 km intervals.

FAQ

Q: Can I use it on dirty or oiled bolts?
A: Yes, it bonds strongly even on oiled surfaces without cleaning, saving you time on prep.

Q: How long until it's fully set?
A: Cures in minutes on active metals like steel; full strength in hours, ready for immediate light use.

Q: Is it removable?
A: Medium strength allows hand tool removal without heat or special tools, unlike permanent lock types.