ExoAir® TWF (Thru-Wall Flashing) is a 40-mil (1.0 mm) composite sheet designed for use as a thru-wall flashing. It is composed of 32 mils (.80 mm) of self-adhering SBS rubberized asphalt laminated to an 8-mil (.20 mm) cross-laminated, high-density polyethylene film with a siliconized release liner. ExoAir TWF provides protection against potential damage that could occur during building façade installation, keeping the membrane intact. It will seal around penetrations, promoting an air-tight seal throughout the membrane. Compatibility with other ExoAir system components ensures long-term adhesion and complete system performance.