3M 08374 Ultrapro Gray MSP Sprayable Seam Sealer Cartridge - 10.5 fl. oz. A single component moisture-curing MSP seam sealer. Grey in color. Designed for interior and exterior body joints. Can be caulked or sprayed. Adheres well to primed surfaces except acrylic lacquer. Paintable immediately. May also be used as a coarse textured coating for undercarriages and as an interior sound deadener.