3M Marine Adhesive Sealant 4000 UV is a one-part adhesive sealant that cures to form a firm, rubbery, waterproof seal. Apply 3M™ Marine Adhesive Sealant 4000 UV for marine applications above and below the waterline including typical bedding and sealing applications to fiberglass hull, wood to fiberglass, porthole frames, deck fittings, mouldings, through hull and deck hardware. It has a low VOC 20 minute skin time. It offers very high strength, excellent UV resistance for glazing applications, non-sagging and non-cracking or corrosive properties, making it ideal for all kinds of weather.