Permatex Ultra Copper Silicone Gasket Maker 3oz 81878This RTV gasket maker features a high amount of copper making it perfect for high heat settings. Tested to exceed OEM specifications, it can resist temperatures up to 700F. This is perfect for high operating temperatures, turbocharger applications, and exhaust sytems.Benefits of Ultra Copper Silicone Gasket Maker Sensor safe; High-temp gasket maker; Resists fluids and vibrations; For high temperature settings;