Phelps Style 9815 is 100% RTV (room temperature vulcanizing) silicone that can be used anywhere a high temperature sealant/adhesive is required. This high temp silicone sealant builds a formed-in-place gasket at operating temperatures up to 310°C. Phelps Style 9815 high temperature silicone remains permanently flexible and provides excellent resistance to aging, vibration and shock. Style 9815 can be applied outdoors at temperatures as low as -37F. Style 9815 silicone sealant sticks to metal and glass surfaces.