.02" Thick PTFE Exhaust Sealing Tape W/Adhesive, 1"X8" Strips, 2Pk, Use For Temperatures Up To 525 Degrees F, Great For Slip On Mufflers, Or To Seal Muffler Canister At Time Of Re-Packing, Can Also Be Used To Seal Fluid Connections. Not Recommended For Exhaust Ports Or Engine Heads Where Heat Exceeds 525 Degrees. Adhesive Backing For Placement During Installation.