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 the use of a patented adhesion system. This gasket maker meets performance specs of OE silicone gaskets and is OEM specified. Temperature range -65 degrees Fahrenheit to 500 degrees Fahrenheit intermittent; resistant to common auto shop fluids like oil and coolant. Ultra Black is perfect for applications such as oil pans, valve covers, timing covers and more. Ultra Black offers significant performance advantages, excellent flexibility and oil resistant, sensor-safe properties and can be use in place of pre cut gaskets. 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.