Quikrete's One-Coat Fiberglass Reinforced Stucco (FRS) is an alternative wall cladding system. The system is a proprietary cementitious mix for use as an exterior coating reinforced with metal or wire fabric lath. It is applied to substrates that are load bearing walls of concrete, masonry, or light-framing covered with gypsum board, fiberboard, wood structural wall sheathing, foam plastic insulations, or similar substrates. QUIKRETE One Coat FRS may also be used as the scratch and brown coat in conventional two- or three-coat stucco systems per ASTM C926.