The Permatex High Temperature Thread Sealant is the perfect solution for locking and sealing threaded fittings. This sealant is designed to resist moisture, moisture entrapment, vibration loosening, hydraulic fluids and diesel fuels, so you can be sure that your fittings will stay secure. It also simplifies assembly and disassembly by lubricating threads, so you don't have to worry about wear or tear. It is perfect for any job that requires a secure seal. FleetPride is your First Click in Heavy Duty®.