Permatex Red Threadlocker Permatex High-Temp, High-Strength Threadlocker Red offers unparalleled holding power for heavy-duty applications, securing fasteners between 3/8 to 1 in size. Ideal for locking studs and press fits, it prevents vibration-induced loosening with up to 3,000 PSI of securing force. Engineered to withstand extreme conditions, it remains effective at temperatures up to 450F (232C), though removal might require heat or special tools due to its permanent bonding capabilities. Features: High temperature, high strength threadlocker for heavy-duty applications Prevents bolts and press fits 3/8 to 1 1/2 (10mm to 38mm) from loosening due to shock, severe vibration and heat stress Exclusive formulation for newer engines and high performance applications Suited for temperatures up to 450F (232C) Removable with heat and hand tools