MasterSeal AWB 660 I is a one-component fluid-applied air/water-resistive barrier that can also function as a Class I vapor retarder. It is based on Silica Fortified Rubber chemistry. This water resistant, resilient membrane may be spray-, roller-, or brush- applied directly to approved above grade wall substrates. It provides excellent secondary moisture protection behind most wall claddings including brick, siding, metal panels, EIFS and stucco. A slipsheet is required for stucco claddings.
