Eastwood High Temp Internal Exhaust Coating reduces under hood temperatures and extends the life of exhaust system components Thermal coating withstands up to 1800 degrees F 2 foot long, 360-degree aerosol extension nozzle for easy application Works with both new and used exhaust system components Use our exclusive formula to coat the inside of exhaust system components to trap the heat inside the tubing, thereby lowering under hood and under car temperatures. Great for headers, exhaust manifolds and more!