Skip to content Skip to navigation menu

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.

$14.99

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

$20.99

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

$21.99

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

West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.

REVIEW SNAPSHOT®

by PowerReviews
 
4.2

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

83%

of respondents would recommend this to a friend.

Pros

  • Weather proof (4)
  • Easy to use (3)

Cons

  • Messy (4)

Best Uses

      • Reviewer Profile:
      • Advanced (4)

    Reviewed by 6 customers

    Sort by

    Displaying reviews 1-6

    Back to top

     
    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

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

    (1 of 1 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

    (2 of 2 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 Fast Cure 4200 Polyurethane Adhesive/Sealant:

    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 Fast Cure 4200 Polyurethane Adhesive/Sealant:

    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 Fast Cure 4200 Polyurethane Adhesive/Sealant:

        Watertight

        (7 of 13 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 Fast Cure 4200 Polyurethane Adhesive/Sealant:

          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 1-6

          Back to top

          Questions about this Product?
          1 (800) 262-8464