This grey, 2K urethane primer and surfacer is designed for use as a very high build, medium build, or as a non-sanding primer-sealer. It performs with all basecoat and clearcoat systems, or urethane topcoats. It has a quick, 10- to 15-minute drying time, with a 30-minute re-coat. This primer and surfacer meet OSHA standards.