OSI® Asphalt Flash flexible flashing is a rubberized asphalt backed, self-adhering 20 mil membrane. This membrane is a laminate consisting of a 2 mil high-density polypropylene film and a removable release sheet that has been developed specifically for the QUAD® window and door system. It is efficient, easy to use and provides excellent moisture and air infiltration protection around windows.
California residents see Prop 65 WARNINGS