Permatex High Temperature Threadlocker Red Formula is a high temperature/high strength threadlocker for heavy-duty applications, preventing bolts and press fits 10mm to 25mm from loosening due to shock, severe vibration and heat stress. Exclusive formulation for newer engines and high performance applications that require extreme temperature resistance. This threadlocker is suited for temperatures up to 450 degrees fahrenheit and is removable with heat and hand tools. Applied as a liquid or gel, threadlockers are superior to conventional lock washers, nylon inserts, and other mechanical devices because they secure the entire fastener assembly against loosening from shock and vibration by filling the space between threaded metal parts, curing to form a tough, adhesive bond and seal. They also seal the threads against leakage, preventing rust and corrosion.