Don't leave for a long travel without a gasket maker. This can save your trip and time. Prematax USAOPTIMUM GRAY combines maximum torsional strength and vibration resistance with extreme temperature resistance: -54 ° C to 371 ° C interrupted. Designed for high performance and high temperature applications. Sensor-safe, odorless and non-corrosive. Contains excellent resistance to oils, coolant and liquids.