3M™ Marine Adhesive Sealant Fast Cure 4000UV is a tough, flexible, semi-permanent marine sealant for strong, sharp seals on RVs, boats and other watercraft. Formulated for color stability and UV resistance, it is especially suitable for areas which are exposed to the sun and wherever flexibility is important. This marine adhesive is great for cosmetic seals over permanent adhesive material. It becomes tack-free in as little as 22 minutes, and it typically cures in as little as 24 hours. It is also immediately paintable after curing – so you can get right back out on the water. Marine grade sealant applies right from the container with no mixing required, and cures to form a firm, flexible, waterproof seal. Yet its medium-strength adhesive allows you to disassemble boat parts without damaging them after long-term use. It is ideal for use on wood, glass, gelcoat and fiberglass as well as many metals and plastics, and recommended for topside components like hatches, portlights, metal hardware as well as porthole seals. Like our 4200 marine sealant adhesive, it dissipates stress caused by vibration and shock, and won’t crack under dynamic force. It resists salt, wind, weather and temperature extremes just as effectively for years of worry-free enjoyment on the water.

Ideal for Marine Applications Above and Below the Waterline

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. It is well-suited for many marine applications both above and below the waterline (PDF, 6.73 Mb). Additionally, its superior UV resistance provides reliable long-term performance. Available in cartridge, sausage pack and drum volumes to meet your application needs.

Recommended Applications

Electrical assembly hatch

Stanchion supports

Thru-hull fittings and deck hardware

Porthole frames

Sealing screwholes

Designed to Endure Marine Environments

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.

Understanding Silane Modified Polymer (SMP) Sealants

Silane Modified Polymer sealants provide strong, flexible durable elastomeric bonds that seal against the elements. These sealants offer excellent UV resistance and excel in challenging industrial, transportation and construction applications. SMP sealants (PDF, 797.43 Kb) are available in a wide variety of Shore A hardness, open time and colors to meet many application needs. Choose a 3M Manual or Pneumatic Applicator for dispensing 3M adhesives sealant cartridges and 400ml/600ml sausage packs.

Bringing Better Ideas to the Surface through Science and Innovation

In our 3M Industrial Adhesives and Tapes Division, we apply the science of adhesion to deliver innovative solutions that improve the design and manufacturing processes of companies around the world. In the end, our technologies help customers like you deliver competitive products to the market faster and more efficiently.