3M Company 8505 3M-8505 Fast `N Firm™ Seam Sealer 08505, 1/10 Gallon CartridgeFirm setting product for sealing interior and exterior joints. Adheres well to clean, bare metal, primed metal and paint surfaces. Skins over quickly. Low shrinkage. Can be painted within 20 minutes. Excellent tooling and sanding properties.