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. Maximum Temperature Rating 1,000°F (537°C)., and seals or gaskets for doors/openings in ovens, furnaces, boilers, processing tanks, kettles, etc.Fiberglass Tape, Plain, 1/8 in Thick, 1/2 in Width, 50 ft Length Use for various thermal and acoustic insulation, high temperature and protection applications including insulation and protective wrapping for hot pipes, steam tracer lines and exhaust systems, etc.