Petrol-Gel lubricates and protects o-rings and other kegging equipment. Petrol-Gel is the purest of lubricants, made with an odorless, tasteless, high viscosity index paraffinic base oil. It is compounded with appropriate food grade additives to meet the performance demands for all recommended applications. Authorized by USDA as a lubricant for use where there is incidental contact with food. Tasteless and odorless. Will not taint beer. FDA Approved. Impervious to water. Operating Temp 0° - 185°F, High melting point 195°F. Technical white grease, Valves, pistons, pumps, O-rings, guides, slide mechanisms and more.