DuPont StraightFlash door and window flashing provides premium protection against water intrusion. By sealing vulnerable areas around openings, StraightFlash can help improve the durability and energy efficiency of both homes and commercial structures. A durable, 100% butyl-backed, self-adhered flashing material. Nine months UV resistance. Bridge the gap between rough opening and building envelope to prevent water intrusion around heads and jambs of doors and windows.