Jiffy Seal Butyl Ice & Water Guard HT self-adhered underlayment was designed for high temperature, highly conductive roofs (Copper, Zinc and CortenTM) and high-altitude applications. Jiffy Seal Butyl Ice & Water Guard HT protects your roof from the damage caused by roof leaks due to ice dams and wind driven rain.
Jiffy Seal Butyl Ice & Water Guard HT sticks to the roof deck, forms superior laps and seals around nails. Jiffy Seal Butyl Ice & Water Guard HT can be installed in temperatures as low as 20°F and is rated to 300°F.