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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
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
Fast Cure 4200 Polyurethane/Adhesive Sealant - White, 3oz. 593147 05260
In stock online.

$16.49

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

$21.99

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

$22.99

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
3MFast Cure 4200 Polyurethane Adhesive/Sealant
 
4.5

(based on 10 reviews)

Ratings Distribution

  • 5 Stars

     

    (7)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

90%

of respondents would recommend this to a friend.

Pros

  • Easy to use (7)
  • Weather proof (7)
  • Visually pleasing (6)
  • Protects well (4)

Cons

  • Messy (6)

Best Uses

  • Outdoors (4)
    • Reviewer Profile:
    • Advanced (7)
    • Was this a gift?:
    • No (4)

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 10 customers

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Displaying reviews 1-10

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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:

      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

      (4 of 4 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.

      (3 of 3 customers found this review helpful)

       
      4.0

      Good as bedding compound

      By gmhyde

      from Pullman, WA

      About Me Advanced

      Verified Buyer

      Pros

      • Easy to Use
      • Weather Proof

      Cons

      • Messy

      Best Uses

      • Bedding compound

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

      Worked well for bedding traveler track

      (4 of 4 customers found this review helpful)

       
      5.0

      Great on stanchions and pulpit fittings

      By Catalina fixer

      from minnetonka

      About Me Advanced

      Pros

      • Easy to Use
      • Visually Pleasing
      • Weather Proof

      Cons

        Best Uses

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

          Watertight

          (8 of 14 customers found this review helpful)

           
          2.0

          Unhappy customer

          By MrDave2You

          from Bakersfield, CA

          About Me Advanced

          Verified Buyer

          Pros

          • Forms a watertight seal
          • Weather Proof

          Cons

          • Difficult to Use
          • Does not fill cracks well
          • Forms bubbles
          • High priced
          • Messy

          Best Uses

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

            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.

            Displaying reviews 1-10

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