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 is the 10 oz. cartridge. Choose Color and Cartridge Size.

IN STOCK - Available for pickup
$19.94 / ea
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Tech Spec Product Info User Generated Content
Below Water Line (yes/no): Yes
Material: Polyurethane
Rate Of Cure: Fast
Strength: Good
Type: Adhesive
Usage: Bonding
4.3 15

great product to work with


this product was fresh


green bay WI.


Marine sealant


Great product. I replaced a drain fitting that was leaking into my boat. No more leak! Thanks JD


Dallas, Tx

reliable product


i use this 4200 for everything above the waterline,


sheeds ferry NC.


Worked perfectly!


First, Jamestown has the best prince!I used this to adhere aluminum skin to the side of wooden trailer and it worked perfectly. I have no complaints for its performance, what so ever. The only thing you need to what is that once you open, there is not a easy way to keep remainder from hardening. The best thing to do is to plan ahead and use full tube all at once.There are a few more things I need to mount, so I will be ordering soon.




Avoiding mess with 3M adhesives


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.


Mid Atlantic


Product was great, shipping was lousy


This product was easy to apply and dries very quickly. The only problem we had was the shipping.


Loreauville, LA


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. 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.


Oklahoma City, OK


Great temporary repair for truck floor!


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...


Brooksville, FL


What else is there?


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.


Long Beach, CA


Just what I needed....


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.

Tennis Court Todd

Pompano Beach, FL


3M 4200 Fast Cure Marine Sealant



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