TotalBoat Bond Marine Sealant
3M 4200 Fast Cure Marine Sealant
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  • 3M 4200 Fast Cure Marine Sealant
  • 3M 4200 FC Sealant

3M 4200 Fast Cure Marine Sealant

3M 4200 Fast Cure is a one-part general purpose polyurethane sealant with good adhesion to wood, fiberglass, gelcoat, plastic, and metal. When cured, 4200 forms watertight, weather-resistant seals on joints and boat hardware above or below the waterline.

4200 FC (fast cure) is ideal for hardware and bedding applications. It is paintable and sandable. While 3M 5200 sealant results in permanent bonds, 4200 has approximately half the strength, making it a good choice for applications where the bond may need to be broken in the future such as replacing hardware.

Size displayed 10 oz. cartridge

 
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Tech Spec Product Info User Generated Content
Below Water Line (yes/no): Yes
BRAND: 3M
Material: Polyurethane
Rate Of Cure: Fast
Strength: Good
Type: Adhesive
Usage: Bonding
4.4 14

REVIEW SNAPSHOT®

by PowerReviews
3M 4200 Fast Cure Marine Sealant
 
4.4

(based on 14 reviews)

Ratings Distribution

  • 5 Stars

     

    (8)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

92%

of respondents would recommend this to a friend.

Pros

  • Protects well (11)
  • Weather proof (10)
  • Easy to use (9)
  • Visually pleasing (9)

Cons

  • Messy (6)

Best Uses

  • Outdoors (8)
  • Quick fix (3)
    • Reviewer Profile:
    • Advanced (5), Casual/ recreational (5)
    • Was this a gift?:
    • No (8)

Most Liked Positive Review

 

3M 4200 Sealant as caulk for bathroom

After many years of unsatisfactory results using hardware store/home center caulks, I spent the big money and went with a marine product. I selected the 4200 over the 5200 because I wanted to...Read complete review

After many years of unsatisfactory results using hardware store/home center caulks, I spent the big money and went with a marine product. I selected the 4200 over the 5200 because I wanted to be able to remove the caulk for future repairs etc. This sealant applied nicely and remained workable for a nice long time for touching up. I tooled the sealant with my finger dipped into a small bowl with a bar of ivory soap and water and kept a mineral spirits soaked rag to keep my hands clean and wipe up stray sealant. When tooling the caulk, I first pushed it in place and used very light force when wiping it to keep from pulling it away and wasting material. The result was a beautiful smooth and tidy bead. I check back in a year to report the durability as other caulks never make it a year, especially in my tile wall/tile floor shower stall.

VS

Most Liked Negative Review

 

What a mess!

I was using this product to bed and seal new jib tracks. When applying a 'dab', product was extremely stringy. Wind blown strands had to be cleaned off the hull and track. ...Read complete review

I was using this product to bed and seal new jib tracks. When applying a 'dab', product was extremely stringy. Wind blown strands had to be cleaned off the hull and track. The air temperature was in the low 80's F. Also, the product appeared to set up much too quickly. I don't know if this was a defective batch since this was the first time I used this product.

Reviewed by 14 customers

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5.0

Marine sealant

By Randy

from Dallas, Tx

About Me Casual/ Recreational

Verified Buyer

Pros

  • Easy to Use
  • Protects Well
  • Visually Pleasing
  • Weather Proof

Cons

    Best Uses

    • Quick Fix

    Comments about 3M 4200 Fast Cure Marine Sealant:

    Great product. I replaced a drain fitting that was leaking into my boat. No more leak! Thanks JD

    • Was this a gift?:
    • No
     
    5.0

    reliable product

    By Burt

    from sheeds ferry NC.

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Easy to Use
    • Protects Well
    • Visually Pleasing
    • Weather Proof

    Cons

    • Messy

    Best Uses

    • Outdoor

    Comments about 3M 4200 Fast Cure Marine Sealant:

    i use this 4200 for everything above the waterline,

    • Was this a gift?:
    • No

    (1 of 1 customers found this review helpful)

     
    5.0

    Worked perfectly!

    By ryuandwings

    from JACKSON, TN

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Protects Well
    • Weather Proof

    Cons

      Best Uses

        Comments about 3M 4200 Fast Cure Marine Sealant:

        First, Jamestown has the best prince!
        I used this to adhere aluminum skin to the side of wooden trailer and it worked perfectly. I have no complaints for its performance, what so ever.
        The only thing you need to what is that once you open, there is not a easy way to keep remainder from hardening. The best thing to do is to plan ahead and use full tube all at once.
        There are a few more things I need to mount, so I will be ordering soon.

        • Was this a gift?:
        • No

        (1 of 1 customers found this review helpful)

         
        5.0

        Avoiding mess with 3M adhesives

        By Windnrock

        from Mid Atlantic

        About Me Advanced

        Verified Reviewer

        Pros

        • Easy to Use
        • Protects Well
        • Visually Pleasing
        • Weather Proof

        Cons

          Best Uses

          • Indoor
          • Marine
          • Outdoor

          Comments about 3M 4200 Fast Cure Marine Sealant:

          These are great products and yes, if you allow it, they will get messy.
          When using these products:
          Choose the right product for the application! 5200 will yellow in the sun.
          Tape off area, give yourself room, make your lines straight. Put on gloves.
          Don't over fill, you will just have to wipe more off. Wipe the end of the tube with a paper towel when you pull it away
          Don't over tighten fasteners, you want to leave some adhesive between surfaces and finish tightening after cure.
          Wipe off excess, a little at a time to avoid smearing.
          Wipe down with Multi purpose cleaner or acetone for a clean smooth finish, remove tape after surface cures.

          (1 of 1 customers found this review helpful)

           
          5.0

          Product was great, shipping was lousy

          By DIANA D

          from Loreauville, LA

          About Me Advanced

          Verified Buyer

          Pros

          • Easy to Use

          Cons

            Best Uses

            • Outdoor
            • Wood Trim

            Comments about 3M 4200 Fast Cure Marine Sealant:

            This product was easy to apply and dries very quickly. The only problem we had was the shipping.

            • Was this a gift?:
            • No

            (1 of 2 customers found this review helpful)

             
            1.0

            What a mess!

            By DavyGravy

            from Oklahoma City, OK

            About Me Casual/ Recreational

            Verified Reviewer

            Pros

              Cons

              • Difficult to Use
              • Messy

              Best Uses

                Comments about 3M 4200 Fast Cure Marine Sealant:

                I was using this product to bed and seal new jib tracks. When applying a 'dab', product was extremely stringy. Wind blown strands had to be cleaned off the hull and track. The air temperature was in the low 80's F. Also, the product appeared to set up much too quickly. I don't know if this was a defective batch since this was the first time I used this product.

                • Was this a gift?:
                • No

                (1 of 1 customers found this review helpful)

                 
                5.0

                Great temporary repair for truck floor!

                By Mitchell

                from Brooksville, FL

                About Me Advanced

                Verified Reviewer

                Pros

                • Easy to Use
                • Protects Well
                • Weather Proof

                Cons

                  Best Uses

                  • Engine
                  • Outdoor
                  • Quick Fix

                  Comments about 3M 4200 Fast Cure Marine Sealant:

                  I used this to repair some rust holes in the floor of my truck as a temporary repair. I simply dried it out, gave it a good vacuuming and applied it and it adhered incredibly well, much better than standard silicone would have...

                  • Was this a gift?:
                  • No

                  (1 of 1 customers found this review helpful)

                   
                  4.0

                  What else is there?

                  By Derfsikrab

                  from Long Beach, CA

                  About Me Advanced

                  Pros

                  • Protects Well
                  • Weather Proof

                  Cons

                  • Messy

                  Best Uses

                  • Outdoor
                  • Quick Fix

                  Comments about 3M 4200 Fast Cure Marine Sealant:

                  This is the best bonding and bedding compound for hardware. Its very reliable and I've been using it for years.
                  Its messy as hell, so equipe yourself with an abundance of rags; some dry, some with mineral spirits on them.

                  • Was this a gift?:
                  • No

                  (1 of 1 customers found this review helpful)

                   
                  4.0

                  Just what I needed....

                  By Tennis Court Todd

                  from Pompano Beach, FL

                  About Me Professional

                  Verified Reviewer

                  Pros

                  • Protects Well
                  • Visually Pleasing
                  • Weather Proof

                  Cons

                  • Messy

                  Best Uses

                  • Outdoor

                  Comments about 3M 4200 Fast Cure Marine Sealant:

                  I was looking for a durable product to use on an project that is highly exposed to sun, salt and water in the Bahamas. I figured this would be the best solution and it needed to be black in color. Only wish it was sold in smaller quantities so that application wouldn't require a caulking gun.

                  • Was this a gift?:
                  • No

                  (2 of 2 customers found this review helpful)

                   
                  5.0

                  Great stuff

                  By amelia

                  from memphis, tn

                  About Me Beginner

                  Pros

                  • Easy to Use
                  • Protects Well
                  • Visually Pleasing
                  • Weather Proof

                  Cons

                  • Messy

                  Best Uses

                  • Inground pool

                  Comments about 3M 4200 Fast Cure Marine Sealant:

                  I used this to repair the tiles that had fallen off my inground pool at the water line. Great stuff. Have to use w/in 24 hrs of opening but is workable for awhile after I placed the tile. By the next morning, it was on for good. DO NOT get this on your hands. If you do-I used goofoff til I couldn't stand the burning anymore then it took a couple of days to wear off. I did notice it wore off really quick after I scrubbed my bathtub-I have no idea why. By the way-I am a woman so you can do this too.

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