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3M
Fast Cure 4200 Polyurethane Adhesive/Sealant

Cures fast and forms a watertight seal between joints and hardware

One-part, all-purpose sealant chemically reacts with moisture and forms flexible, watertight, weather-resistant seals on joints and hardware. Can be used above or below the waterline; approximately half the strength of 3M's 5200, which allows for eventual dissasembly of parts. Note: Can be softened by some teak cleaners and sealers and is not recommended for sealing teak decks.

  • Formulation: One-part fast-cure polyurethane adhesive/sealant
  • Recommended Usage: Fiberglass, wood, metal, some plastics, above or below water
  • Material Incompatibilities: Acrylics ABS, Lexan
  • Cure Time: Tack free: 2 hrs; complete cure: 24 hrs
  • Cleanup: Mineral spirits or kerosene
  • Removal: Mechanical removal
  • Tensile Strength: 300psi
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
Fast Cure 4200 Polyurethane/Adhesive Sealant - White, 3oz. 593147 05260
In stock online.

$17.99

Fast Cure 4200 Polyurethane/Adhesive Sealant - White, 10oz. 593154 06560
In stock online.

$22.99

Fast Cure 4200 Polyurethane/Adhesive Sealant - Black, 10oz. 593139 06564
In stock online.

$23.99

Product Description

Cures fast and forms a watertight seal between joints and hardware

One-part, all-purpose sealant chemically reacts with moisture and forms flexible, watertight, weather-resistant seals on joints and hardware. Can be used above or below the waterline; approximately half the strength of 3M's 5200, which allows for eventual dissasembly of parts. Note: Can be softened by some teak cleaners and sealers and is not recommended for sealing teak decks.

  • Formulation: One-part fast-cure polyurethane adhesive/sealant
  • Recommended Usage: Fiberglass, wood, metal, some plastics, above or below water
  • Material Incompatibilities: Acrylics ABS, Lexan
  • Cure Time: Tack free: 2 hrs; complete cure: 24 hrs
  • Cleanup: Mineral spirits or kerosene
  • Removal: Mechanical removal
  • Tensile Strength: 300psi

Specs

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REVIEW SNAPSHOT®

by PowerReviews
3M Fast Cure 4200 Polyurethane/adhesive Sealant - White, 3oz.
 
4.4

(based on 13 reviews)

Ratings Distribution

  • 5 Stars

     

    (9)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (2)

  • 1 Stars

     

    (0)

85%

of respondents would recommend this to a friend.

Pros

  • Easy to use (9)
  • Weather proof (8)
  • Visually pleasing (6)
  • Protects well (5)

Cons

  • Messy (6)

Best Uses

  • Outdoors (6)
  • Quick fix (3)
    • Reviewer Profile:
    • Advanced (8)
    • Was this a gift?:
    • No (7)

Most Liked Positive Review

 

Strong and Tenacious Bond - Waterproof

4200 is a thick product that bonds tenaciously to a wide range of surfaces. Unlike 5200, it allows bonded parts to be removed at a later date with less risk of damage to gelcoated...Read complete review

4200 is a thick product that bonds tenaciously to a wide range of surfaces. Unlike 5200, it allows bonded parts to be removed at a later date with less risk of damage to gelcoated surfaces.

Good for use under the waterline to seal thru-hull fittings and under water light housings.

The product is difficult to clean up, which is a trade-off for the superior bonding characteristics.

White 4200 yellows somewhat over time, so do not use it in high visability areas, such as windshield frames and trim areas. Use 4000 UV in those situations which will stay bright white.

VS

Most Liked Negative Review

 

Unhappy customer

Do not try to fill seams, cracks, or small holes with this product. I guess it is only good foor attaching thru hull and other hardware.

Do not try to fill seams, cracks, or small holes with this product. I guess it is only good foor attaching thru hull and other hardware.

Reviewed by 13 customers

Displaying reviews 1-10

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5.0

Best Price for the Best Product

By Rami

from Longview, TX

About Me Advanced

Pros

  • Easy to Use
  • Protects Well
  • Weather Proof

Cons

    Best Uses

    • Outdoor

    Comments about 3M Fast Cure 4200 Polyurethane/adhesive Sealant - White, 3oz.:

    Boats and motorhomes have a great deal in common. I am restoring my motorhome with 3M 4200 fast cure for rebuilding the cab-over to secure the fiberglass to the wood. It forms a strong flexible bond with great working time and it cures fast in high heat and humidity (I live in East Texas). It is removable with a scraper, but not much else will cause it to let go. I have used many tubes of this adhesive, and partially used tubes keep well if the are wrapped up and placed in the back of the refrigerator (won't cure below 40 degees fahrenheit) Great Product at a great price

    • Was this a gift?:
    • No

    (0 of 1 customers found this review helpful)

     
    2.0

    Low priced gun.

    By Captain Bob

    from Pensacola Florida

    About Me Professional

    Verified Buyer

    Pros

    • Easy to Use

    Cons

    • Not Durable

    Best Uses

      Comments about Fast Cure 4200 Polyurethane Adhesive/Sealant:

      Not good for higher density products. Unit distorts easily under moderate trigger pressure. Buy the better quality units for dispensing 3M 4200 or 5200 type caulks.

      • Was this a gift?:
      • No
       
      5.0

      Always a good choice for above and below waterline

      By Captain Bob

      from Pensacola Florida

      About Me Professional

      Verified Buyer

      Pros

        Cons

          Best Uses

          • Indoor
          • Outdoor
          • Quick Fix

          Comments about Fast Cure 4200 Polyurethane Adhesive/Sealant:

          Used to seal dorade vents and thru hull fittings

          • Was this a gift?:
          • No
           
          5.0

          Excellent product.

          By GT Joe

          from Grand Rapids, MI

          About Me Casual/ Recreational

          Verified Buyer

          Pros

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

          Cons

            Best Uses

            • Indoor
            • Outdoor
            • Quick Fix

            Comments about Fast Cure 4200 Polyurethane Adhesive/Sealant:

            I used the 4200 to re-seal around the rub rail on my old Glastron GT-150. The whole back half of the rail is under water more than its above water due to the low stance of the boat. I let this stuff cure for a few days and it has created a firm rubbery seal that seems to have a great bond to the fiberglass. The only thing I would say is negative would be it messy to use and it dries fast so you have to work fast, but I knew that before I bought it. The 5200 is easier to use but I wanted to be able to take it apart some day.

            Service and delivery comments:

            The guys at my local West Marine Store were very knowledgeable and helpful in selecting the right product for my needs.

            • Was this a gift?:
            • No
             
            5.0

            Great stuff

            By Sailor

            from Palmetto, Florida

            About Me Advanced

            Verified Buyer

            Pros

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

            Cons

            • Messy

            Best Uses

            • Attaching rubber trim

            Comments about Fast Cure 4200 Polyurethane Adhesive/Sealant:

            Rubber trim around gunnel was loose, Cleaned area with MEK and it worked perfectly

            Service and delivery comments:

            Picked up in store

            • Was this a gift?:
            • No
             
            5.0

            Excellent performer

            By Cap'n Rick

            from Kemah TX

            About Me Advanced

            Verified Buyer

            Pros

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

            Cons

            • Messy

            Best Uses

            • hull-deck joint
            • Outdoor
            • Quick Fix

            Comments about Fast Cure 4200 Polyurethane Adhesive/Sealant:

            A bit messy, but cleanup is reasonable and product adheres well to surfaces and is easy to work before it starts to cure.

            • Was this a gift?:
            • No
             
            5.0

            Easy to use

            By Jim

            from East Haddam, CT

            About Me Advanced

            Verified Buyer

            Pros

            • Easy to Use
            • Visually Pleasing

            Cons

              Best Uses

              • Outdoor

              Comments about Fast Cure 4200 Polyurethane Adhesive/Sealant:

              Installed some new thru hulls and bedded them with this. It lasts a long time and is durable.

              • Was this a gift?:
              • No

              (1 of 1 customers found this review helpful)

               
              5.0

              Worked great

              By Bravo

              from Atlanta

              About Me Casual/ Recreational

              Verified Reviewer

              Pros

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

              Cons

              • Messy

              Best Uses

              • Outdoor

              Comments about 3M Fast Cure 4200 Polyurethane/adhesive Sealant - White, 3oz.:

              Works greasy for sealing new traveler track. Didn't realize it was available in black until I was done with project though.

              (2 of 2 customers found this review helpful)

               
              4.0

              works

              By dellray

              from washington

              Verified Buyer

              Comments about Fast Cure 4200 Polyurethane Adhesive/Sealant:

              Filled holes with it does a good job

              (5 of 5 customers found this review helpful)

               
              5.0

              Strong and Tenacious Bond - Waterproof

              By Mad Ludwig

              from NJ

              About Me Advanced

              Verified Buyer

              Pros

              • Bonds well
              • Superior Reliability

              Cons

              • Cleanup Difficult
              • Messy

              Best Uses

              • Thru-hull Fittings
              • Under Water Lights

              Comments about 3M Fast Cure 4200 Polyurethane/adhesive Sealant - White, 3oz.:

              4200 is a thick product that bonds tenaciously to a wide range of surfaces. Unlike 5200, it allows bonded parts to be removed at a later date with less risk of damage to gelcoated surfaces.

              Good for use under the waterline to seal thru-hull fittings and under water light housings.

              The product is difficult to clean up, which is a trade-off for the superior bonding characteristics.

              White 4200 yellows somewhat over time, so do not use it in high visability areas, such as windshield frames and trim areas. Use 4000 UV in those situations which will stay bright white.

              Displaying reviews 1-10

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