STOPGAP P131 is a floor primer formulated to enhance the adhesion of STOPGAP smoothing compounds to a wide range of smooth, non-absorbent surfaces. It can also be used as a general-purpose primer on absorbent substrates to improve adhesion and regulate drying time of adhesives and smoothing compounds, supporting a high-quality finish. The product has marine approval and is suitable for use in all F. Ball marine applications as part of an IMO-compliant system.