FlexWrap RW provides builders with a unique solution for flashing recessed windows in numerous kinds of wall assemblies, including single- and double-stud as well as open-stud construction. Made by DuPont, the butyl-based flashing system is AAMA 711-07 compliant and ASTM E-331 compliant for standard water intrusion resistance. It retails with enough material to flash two recessed windows.