Tiger Patch Muffler and Tailpipe Repair Tape heat seals itself around cracks and holes to form a permanent repair on mufflers and tailpipes. Helps to stop exhaust noise and seal out dangerous fumes. Seals in minutes, no tools necessary and is mechanic approved. Professional Size - longer and wider tape. Product Features:Works best on: Mufflers, tailpipes, and conventioanl exhaust systemsTape heats itself (no activation solution necessary)Chemical Solvent resistance to automotive fluids, oils and road saltTemperature Range: up to 1900 Deg. F