FiberFix Heat Wrap is your solution for permanent high-heat repairs. Need to fix an exhaust pipe, water heater or furnace? The Heat Wrap withstands up to 850 degrees Fahrenheit. Dip it in water to activate, wrap it around what you need to fix, and apply heat. In just one hour, you’ll have a permanent repair. Excellent for tough jobs, cars, motorcycles, trucks and any high temperature surface at home or at work.