Polyguard WS20 Window Seal 20 Mil Flashing Tapes are used to strip in or flash straight window frames, door frames, and other construction seams. WS20 is a self-adhering, self-sealing tape consisting of rubberized asphalt waterproofing coating, laminated to polyethylene film. The finished product is supplied in rolls, with an easy to remove film release liner. WS20 is available in 20 mil thickness and a variety of roll sizes. WS20 is AAMA 711 Verified.
