Weld-Crete incorporates polyvinyl acetate homopolymer in a patented formulation. For exterior and interior use, Weld-Crete will bond new concrete, Portland cement plaster, and cementitious mixes to structurally sound concrete floors, walls, columns, beams, steps and ramps. Plaster-Weld, the original plaster bonding agent is a patented formulation incorporating polyvinyl acetate homopolymer. It is designed for interior use only. High performance bonding of one-coat finish plaster and/or two and three coat work to concrete ceilings, walls, columns, beams and other structurally sound surfaces.