Silicone rubber is widely used for high/low temperature gasketing & sealing applications. It offers the widest temp range of any polymer, with excellent resistance to moisture, radiation, oxidation, and weathering. Temp range: -103F to +500F. Duro: 60A. Color: orange-red. Comes in 12″x23-1/2″ sheet. Meets AMS3303 ZZ-R-765, Class 2A & 2B.