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 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.