DuPont Flashing Tape is a self-adhered flashing that helps protect the heads and jambs of rectangular windows and doors from water intrusion providing a durable seal at the window-wall interface. DuPont Flashing Tape is a self-adhered flashing that is designed to help protect the heads and jambs of windows. These areas can be subjected to wind-driven rain, which can find its way into a window and cause water damage. DuPont qualifies its flashing products according to the AAMA 711-07 Voluntary Specification for Self Adhering Flashing Used for Installation of Exterior Wall Fenestration Products. DuPont Flashing Tape comes backed by a 10-year limited warranty from DuPont, a company dedicated to providing innovative and reliable products for over 200 years. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.