Urethane Seam Sealer, 08365, is a premium one-part, moisture-curing seam sealer designed for application to exterior and interior body seams. It does not shrink and stays permanently flexible. It adheres well to primed metal and painted surfaces, and can be smoothed to a featheredge and/or brushed. The 3M Urethane Seam Sealer is tack-free and paintable in 30 minutes.