- Permatex Ultra Black Maximum Oil Resistance RTV Silicone Gasket Maker is a fast-curing, sensor safe, low odor, non-corrosive formula that retains high flexibility, and oil resistance properties through use of a patented adhesion system. This gasket maker meets performance specs of OE silicone gaskets and is OEM specified. For dealership warranty requirements it also ensures extended drivetrain warranty compliance. Temperature range -65 degrees fahrenheit to 500 degrees fahrenheit intermittent; resists auto and shop fluids and vibration. These gasket makers offer significant performance advantages, excellent torque retention and hi-temp, sensor-safe properties. Extended warranties, engine sensors and new component materials such as aluminum, bi-metal alloys and high-tech plastics, have created the need for superior RTV silicone gasket makers in both OEM production and service applications. Permatex always has the right gasket maker for your application.