Permatex Ultra Blue Multipurpose RTV Silicone Gasket Makers are sensor-safe low odor and non-corrosive with outstanding oil resistance and joint movement values. Developed to meet today s technology changes Permatex ultra silicones are eight times more flexible than cork/composite gaskets and three times more oil resistant than conventional silicones. With a temperature range of -65 degrees fahrenheit to 500 degrees fahrenheit intermittent these OEM specified gaskets resist auto and shop fluids as well as vibration. These gasket makers offer significant performance advantages excellent torque retention and hi-temp sensor-safe properties. Permatex always has the right gasket maker for your application.