Designed to seal exhaust joint on the muffler when repacking or - if needed - where the muffler attaches to the header pipeEffectively seals the exhaust system against vapor and engine residue leaks at couplingsMax operation temperature is 1800°FWoven silica tape.030'' thick, 1'' wide and 8'' longAdhesive attachedTwo pieces includedMade in the U.S.A.