3M Fast Cure 4200 Polyurethane Adhesive/Sealant

Priced: $20.99 Rated:   - 4 stars out of 5 by 5 reviews.
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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.

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3M Fast Cure 4200 Polyurethane Adhesive/Sealant Reviews:

Positive Reviews:

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 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.
Mad Ludwig at WestMarine.com on 04/04/2013


Filled holes with it does a good job
dellray at WestMarine.com on 07/07/2013

Good as bedding compound

Worked well for bedding traveler track
gmhyde at WestMarine.com on 05/05/2012

Great on stanchions and pulpit fittings

Catalina fixer at WestMarine.com on 09/09/2011

Negative Reviews:

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.
MrDave2You at WestMarine.com on 05/05/2011