E. I. DuPont India P. Limited manufactures Flashing Tape. E. I. DuPont India P. Limited products are ISO certified. Flashing Tape or E. I. DuPont India P. Limited ™ Flashing is a self-adhered flashing that helps to protect the heads and jambs of rectangular windows and doors from water intrusion providing a durable seal at the window-wall interface. These areas can be subjected to wind-driven rain, which can find its way into a window and cause water damage.