Epoxy-impregnated fiberglass bandage chemically welds mufflers and tailpipes. Permanently repairs holes and leaks in exhaust systems saving costly part replacement. Seals out poisonous fumes to temperatures of 800 Deg. F (426C). Product Features:Permanently repairs holes and leaks in exhaust systemsEpoxy-impregnated fiberglass bandageSaves costly part replacementSeals out poisonous fumes to temperatures of 800 Deg. F (426 Deg. C)