Air-Shield single-component, water-based, polymer-modifi ed air/vapor and liquid moisture barrier cures to form a tough, seamless, elastomeric membrane that resists air and moisture transmission. The product is designed to be a fast-drying formulation, which provides early resistance to rain. Low permeability prevents transmission of air and inhibits moisture and vapor from passing through porous building materials. It is suitable for new construction and restoration. W.R. Meadows. 800-342-5976.