Permatex High Temperature Thread Sealant Permatexs High Temperature Thread Sealant locks and seals threaded fittings in high temperature, extreme environments. Resists leakage, vibration loosening, moisture, hydraulic fluids and diesel fuels while keeping hardware fully secured. Also provides lubrication for easy assembly and disassembly when needed. Ideal for head bolts into through holes, oil PSI sending units and sensors, oil and coolant lines, fuel fittings, rear axle fill plug, brake and power steering fittings. Features: High temperature-resistant thread locker Locks and seals threaded fittings Resists leakage, vibration loosening, moisture, hydraulic fluids and diesel fuels Lubricates threads for easy assembly and disassembly Does not shred or wear like Teflon tape Parts may be repositioned up to 4 hours after application Temperature range -65F to 400F (-54C to 204C) Contains Ptfe