WrapShield SA Self-Adhered is a water resistive highly vapor permeable Water Resistive Barrier (WRB) and Air Barrier (AB) sheet membrane. WrapShield SA Self-Adhered WRB/Air Barrier membrane protects the building envelope by allowing vapor pass through (breathable) but not air or liquid water mitigating costly moisture damage and saving energy for the life of the building. WrapShield SA Self-Adhered sheet membrane is used above grade, behind rain screen wall cladding assemblies.