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