78080G Mr. Gasket Silicone RTV - Grey - 3 Oz. RTV Grey 3 Ounce Tube. Mr. Gasket RTV (room temperature vulcanizing) is a high quality silicone sealant that is for most automotive applications. The Mr. Gasket grey RTV (room temperature vulcanizing) blends right in and isn't noticeable next to most cast iron or aluminum engine castings.
