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Product Details

3M 4000 UV is a fast cure medium strength sealant used to bond and seal metal, gelcoat, fiberglass, wood, and plastic. A one-part polyether adhesive sealant with excellent UV resistance, 4000 cures to a firm, rubbery, watertight seal. This sealant is ideal for bonding deck hardware, hatches, portholes, railings, and navigation lights.

Suitable for use both above and below the waterline, 4000 Fast Cure is sometimes more appropriate than 3M 5200 polyurethane for parts that may never need removal or replacement. Available in White in various sizes.

Info & Guides

Technical Information

  • Superior UV resistance
  • Exceptional sealing properties with Fiberglass, Deck Hardware, and Hatches
  • Fast Curing
  • Paintable
  • Non-cracking
  • Easy Clean-up
  • Becomes tack free in 2 hours and cures in 24 hours
  • Does not resist chemicals—for chemical resistance, try 3M Marine Sealant 101

Reviews for 3M 4000 UV Marine Fast Cure Sealant

7 of 7 Reviews

July 1, 2021

Yes this product was easy to apply and did the job
By John from East Granby ct

Verified Purchase

I used this product to reseal windows, joints and lights on my motor home. The price and availability was the best on the internet!

Bottom Line Yes, I would recommend to a friend

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April 4, 2020

I had good success with this product.
By Slick Rick from Fortson GA

Verified Purchase

I used it to seal floor hatches and seal the console to the deck. It was easy to work, good results.

Bottom Line Yes, I would recommend to a friend

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July 1, 2015

cauking catboat
By catboat ken from seaside park nj

Verified Purchase

tape before cauking

Bottom Line Yes, I would recommend to a friend

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August 18, 2013

this product works for me
By chaze from colorado

Verified Purchase

I used this product on a boat project, I took an old boat 79, and rebuilt it, this product was very usefull in filling the multitude of holes that various owners had put in the boat, it worked very well for use with fasteners of different kinds,to seal them from leaking it covered well with paint. It is a bit messy to use and caution should be used when using it, to keep from getting it in places you do not want it. It cures quckly, and can be sanded to some extent, not recomended for a dent filler or anything like that.

Bottom Line Yes, I would recommend to a friend

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May 12, 2013

Good Buy
By randomac from muscle shoals, AL

Choose this from long list of caulks available based on price & durability yet removable.

Bottom Line Yes, I would recommend to a friend

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September 4, 2012

Wrong quantity tube used in ad
By hannibal1 from South Arkansas

An excellent, easy to use product. Jamestown should use the correct illustration for the 3 oz. tube. A 10 oz. cartridge is shown. Otherwise, an excellent product.

Bottom Line Yes, I would recommend to a friend

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July 22, 2009

Better for deck hardware than 4200
By Mark from CT

Tried both 4200 and 4000 for deck hardware/trim. 4000 stays white and is easier to clean up.

Bottom Line Yes, I would recommend to a friend

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