RTV Silicone, Silicone Gasket Maker, 300 mL, Gray, Temp. Range -65 Degrees to 550 Degrees F, Specific Gravity 1.45, Viscosity Not Specified, Full Cure 7 days, Begins to Harden 10 min, Good Adhesion to Aluminum, High Performance silicone, Non-Corrosive, Flange Sealing on Transmissions and Cast Metal Housings, Standards NSF Category P1