3M ™ Marine Adhesive Sealant 4000 UV is a one-component, medium-strength, moisture-curing, gap-filling sealant that cures to form a firm, flexible and waterproof seal on aluminum, wood, gel coat and fiberglass, making it well-suited for marine applications above or below the waterline. This product offers excellent UV resistance for reliable long term performance. Our 3M ™ Marine Adhesive Sealant 4000 UV is a one-part adhesive sealant formulated to provide an exceptionally strong bond for harsh conditions as well as flexibility to combat vibrations, swelling, shrinking or shock common on boats or other marine applications. 3M ™ Marine Adhesive Sealant 4000 UV is part of our broad range of adhesive sealants uniquely formulated for the marine market. Designed for reliable performance, 3M Marine Adhesive Sealant 4000 UV provides the strength, flexibility and durability that can meet the demands of many tough applications.