Sto's Gold Coat TA is a ready-mixed flexible trowel applied air and water-resistive barrier for use over prepared vertical above-grade concrete, concrete masonry, brick masonry, wood sheathing, glass mat gypsum sheathing, and cementitious sheathing as part of a StoGuard air and water-resistive barrier system. It is used in Sto proprietary wall systems and beneath multiple cladding types.