At Last Silicone That Won't Harden In The Tube! - Depressing the lever dispenses silicone while a patented aerosol pressure valve keeps the unused silicone fresh. Silicone can be used to replace most gasket material including rubber, paper, felt & cork. (unsuitable for replacement of head gaskets) Recommended for water pumps, neck outlets, valve covers, transmission and oil pans. The Black resists temperatures up to 450 degrees F. This silicone also works great for sunroofs, windshields, or any waterproofing job. 6.7 oz aer.