Fiberglass Braided over 304 Stainless Steel Gasket. **Sealtherm Corp.s Fiberglass & Silica Tadpole Gasket Tapes rated up to 2300 F are unmatched in the industry. Due to the unique sealing bulb compression factor and recovery, our Tadpole Tapes offer superior sealing solutions for ovens, furnaces, dampers, boilers, channel sealing, powder coating, conveyors, heat exchangers, and more.