FiberFix Heat Wrap is a fiberglass tape impregnated with temperature-resistant resin that can withstand up to 850 degrees F. Heat Wrap creates a hard-as-steel structural repair for tailpipes, mufflers, and other high-temperature applications. Product Features:2 in x 70 in temperature resistant fiberglass tapeWithstands up to 850 deg FHardens like steel in 1 hourGreat for structural repairs and seals on tailpipes, mufflers, and other high-temperature applications