Self-Adhesive Through-Wall Membrane – 12" x 75' – 40 mil

This 12" x 75' self-adhesive through-wall membrane provides continuous air- and water-vapor sealing for residential and commercial envelopes. At 40 mils (1 mm), it combines SBS-modified elastomeric bitumen with a trilaminated woven polyethylene facer. The self-adhesive backing speeds installation and supports consistent performance in all-weather conditions. Compatible with spray polyurethane foam insulation, it integrates cleanly into typical wall assemblies. Supplied in roll format, it offers efficient coverage for walls, flashings, transitions, and openings to help maintain a continuous air and vapor barrier across the enclosure.