Rutland 500&deg;RTV High Heat Silicone (Black) 10.3 Oz Cartridge Rutland High Temperature Silicone is a great solution to your sealant and adhesive needs Forms a tough and flexible seal Will adhere to most clean surfaces including: glass, metal, plastics, fiberglass, wood, brick, and stone. Seal fireplace inserts, repair solar panels, apply ceramic tiles to your fireplace surround or heat shielding behind your stove, the uses are endless Rated to withstand up to 500 F (260 C)