Permatex Ultra Black retains high flexibility and oil-resistant properties through use of a patented adhesion system. Ultra Black is sensor-safe, low odor, and non-corrosive, with resistance to oil, shop fluids, and vibration. This sensor-safe, low-odor, non-corrosive formula meets the performance specifications of OE silicone gaskets and can be used on high flexibility and high oil-resistant applications such as timing covers, transmission pans and oil pans.