Description Stopgap P131 General Purpose Primer Neoprene emulsion primer to promote adhesion of Stopgap smoothing underlayments to both absorbent and non-absorbent surfaces. Designed to prevent rapid drying of adhesives and smoothing underlayments. Absorbent Concrete, sand/cement screed, plywood, hardwood and chipboard Non-absorbent Terrazzo, steel, galvanised steel, waterproof surface membranes, epoxy, polyurethane and existing adhesive residue
