WeatherMaster® HP-Flex Ice & Water Underlayment is a film-faced, high-temperature roof underlayment suitable for use under any type of roofing material. WeatherMaster® HP-Flex underlayment provides skid resistance, allowing for better traction and safer installation. No special adhesives, heat, or equipment are necessary to install WeatherMaster® HP-Flex underlayment under normal, dry conditions of 45°F or warmer. WeatherMaster® HP-Flex underlayment provides a secondary layer of waterproofing protection needed to help prevent damage from wind-driven rain. WeatherMaster® HP-Flex helps protect the entire deck of a properly ventilated roof or those problem areas where water collects or drainage is slow. This modified, self-adhering underlayment creates a watertight barrier by sealing to the deck and around nails to provide continuous protection year after year.