Permatex High Strength Threadlocker Red 36 ml — Permanent 3,000 PSI Vibration-Resistant Lock

Permatex 27140 High Strength Threadlocker Red is a permanent anaerobic adhesive formulated to lock and seal threaded fasteners and press-fit assemblies for long-term vibration resistance.

This 36 ml bottle of high strength threadlocker is designed for heavy-duty applications where fasteners need a secure, permanent hold. It cures in the absence of air between metal surfaces, forming a rigid bond that prevents loosening from shock and vibration. Removal typically requires mechanical force, heat, or special tools, so it’s intended where service disassembly is rare.

How strong is this threadlocker for mechanical assemblies?

Permatex 27140 develops a high shear strength suitable for demanding automotive and industrial uses. It adds up to 3,000 psi of holding power on slip and press-fit joints, creating a durable joint that resists torque and lateral movement.

• High-strength formulation rated for permanent locking
• 3,000 PSI holding power on slip and press-fit assemblies
• Ideal for studs, bolts, and permanent press fits

Which fasteners and parts is it best applied to?

This red threadlocker is recommended when you need to permanently secure studs, bolts, and press-fit parts in engines, drivetrains, and frames. It replaces mechanical retainers like snap rings and set screws in many heavy-duty situations.

• Cylinder block and rocker arm studs
• Ring gear and frame bolts
• Shock absorber and suspension mounting bolts

How do I remove fasteners treated with Permatex 27140?

Because this product is a high-strength, permanent formula, removal usually requires heat application or specialized tools to break the cured bond. Apply heat to the joint or use impact tools and extractors as needed; plan for replacement hardware after disassembly.

• Heat application can soften the adhesive for easier removal
• Impact or air tools help break highly cured bonds
• Replacement studs or bolts are often recommended after removal

What surface preparation and safety steps should I follow?

For reliable curing, clean parts of oil, grease, dirt, and old adhesive. Use solvent cleaning or degreasing, and ensure parts fit closely—this adhesive cures anaerobically between metal surfaces. Use gloves and work in a ventilated area; avoid skin contact and eye exposure.

• Degrease threads and contact surfaces before application
• Assemble parts promptly after applying to avoid surface contamination
• Follow manufacturer safety data and use protective equipment

Who is this for: Technicians, mechanics, and fabricators who require a permanent, high-strength locking solution for engine and structural fasteners. If you need a removable joint for routine maintenance, consider a medium-strength threadlocker instead; for assemblies that must stay fixed under vibration and load, Permatex 27140 provides a long-lasting option.