Mr. Gasket Anti-Seize has fine metallic particles in a high-heat petroleum carrier that prevents seizing, galling and corrosion. Apply liberally to all commonly serviced fasteners on your vehicle to make future service simple & headache free. For use on spark plugs, exhaust manifold bolts, stainless steel bolts & nuts, and any other fasteners that are prone to seize or rust. 4 ounce bottle with brush built into the cap.