Sto Corp. has introduced StoGuard Gold Coat TA, a trowel-applied version of Gold Coat. The vapor-permeable air barrier membrane is used in Sto-Therm ci systems and troweled directly onto vertical above-grade wall sheathing and concrete masonry. It also functions as a waterproof air barrier when combined with StoGuard joint and rough-opening treatment. The water-based product comes in 5-gallon pails and is ready-mixed for easy application.