Vycor® enV™ is a rolled or spray-applied, one component, acrylic membrane that forms a continuous water and air barrier with seamless protection. Vycor® enV™ protects against ingress of incidental water such as that caused by severe weather, vapor or condensation, into the building. Vycor® enV™ protects moisture sensitive wood structures in the event of a breach in exterior wall coverings. Vycor® enV™ is vapor permeable for wall assemblies requiring a “breathable” characteristic. As a vapor permeable membrane, Vycor® enV™ permits the transfusion of water vapor that may otherwise condense in the wall structure; but is impermeable to liquid water, which allows the material to act as a water drainage plain.