A 100% solids epoxy sealer that improves the effectiveness and efficiency of the maintenance painting process by penetrating and sealing crevices, joints, back-to-back angles of existing structures, and edges of old coatings, improving the service life of the maintenance system. Also serves to seal aged â€œwhite rustedâ€ zinc surfaces for recoating. Recommended for rusty steel when environmental economic or safety concerns restrict abrasive blast cleaning. The extraordinary penetrating properties of Pre-Prime 167 provide a means of reinforcing rusty steel substrates, ensuring adhesion of subsequent coatings. Equally effective at penetrating, reinforcing and sealing concrete and masonry surfaces in all industrial environments.