DELTA-VENT SA is a critical component of an energy-efficient building enclosure, improving the performance of the wall system. DELTA-VENT SA is fully adhered to the substrate so fasteners are not required. Hundreds of potential air leakage points are eliminated. It is quick to apply and has a convenient split release liner for easy application. DELTA-VENT SA is very dimensionally stable and has the most tightly sealed and secure side laps in the industry.