Pro Seal High Temp. RED Silicone Sealant Engine Transmission Pans Gasket Marker. RED RTV Silicone Sealant. Pro Seal High Temperature Silicone Sealant - 1 Piece (Net weight: 3 oz. With its non-corrosive and vibration resistant ability, this Silicone is also ideal for installing Brake Caliper Cover kits and forming a flexible product that resists oil, transmission fluid, water and antifreeze. ).