Completely seal a building enclosure with the easy-to-apply Blueskin VP, a fully integrated, self-adhered, vapor permeable air and water barrier membrane. Backed with a patented permeable adhesive layer, it is applied with simple hand tools in a weatherboard fashion. The product seals the building to control air leakage and maintain a continuous drainage plane. Blueskin VP. Henry Co. 800-486-1278.