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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$179.99 / cs
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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
4.2 11

REVIEW SNAPSHOT®

by PowerReviews
3M 4200 Fast Cure Marine Sealant
 
4.2

(based on 11 reviews)

Ratings Distribution

  • 5 Stars

     

    (5)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

91%

of respondents would recommend this to a friend.

Pros

  • Protects well (8)
  • Easy to use (7)
  • Visually pleasing (7)
  • Weather proof (7)

Cons

  • Messy (5)

Best Uses

  • Outdoors (7)
    • Reviewer Profile:
    • Advanced (5)
    • Was this a gift?:
    • No (5)

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 11 customers

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Displaying reviews 1-10

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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.

     
    5.0

    Product was great, shipping was lousy

    By DIANA D

    from Loreauville, LA

    About Me Advanced

    Verified Buyer
    Ensign

    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
       
      1.0

      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
           
          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
             
            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
             
            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
             
            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.

            (0 of 2 customers found this review helpful)

             
            4.0

            Site Icon vs. Product

            By Russ

            from Rockaway, NJ

            About Me Casual/ Recreational

            Verified Reviewer

            Pros

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

            Cons

              Best Uses

              • Outdoor

              Comments about 3M 4200 Fast Cure Marine Sealant:

              [...]

              (4 of 4 customers found this review helpful)

               
              4.0

              3M 4200 Sealant as caulk for bathroom

              By TonyBarr

              from Birmingham, MI

              About Me Advanced

              Verified Reviewer

              Pros

              • Easy to Use
              • Visually Pleasing

              Cons

              • Must use 24hr after open

              Best Uses

              • Bathroom

              Comments about 3M 4200 Fast Cure Marine Sealant:

              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.

              (2 of 2 customers found this review helpful)

               
              5.0

              Excellent on fiberglass sailboat

              By Willybob48

              from Wisconsin Northwoods

              About Me Recreational

              Verified Reviewer

              Pros

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

              Cons

                Best Uses

                • Outdoor

                Comments about 3M 4200 Fast Cure Marine Sealant:

                Repaired seam between hull and deck on older sailboat. Easy to apply, worked very well, and took a coat of paint. Very pleased. Dries fast.

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