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⚓ Seal it fast, seal it strong — stay leak-free and ahead of the tide!
3M Marine Adhesive/Sealant 4200 is a professional-grade, fast-curing polyurethane sealant designed for marine applications. It bonds and seals fiberglass, gelcoat, wood, plastics, and metals with a strong 300 PSI tensile strength. Fully curing in 24 hours, it forms flexible, watertight seals that withstand harsh weather and underwater conditions. Paintable and sandable, it offers medium strength for easy disassembly, making it ideal for rub-rails, stern joints, deck fittings, and more. Highly rated and trusted by boaters and repair pros alike.







| Asin | B001QWN8VE |
| Best Sellers Rank | #58,953 in Sporting Goods (See Top 100 in Sporting Goods) #73 in Boat Maintenance Supplies |
| Brand Name | 3M |
| Color | White |
| Compatible Material | Fiberglass, Plastic, Wood |
| Container Type | Tube |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,639) 4.6 out of 5 stars |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00051135065600 |
| Item Form | Bonds |
| Item Package Quantity | 1 |
| Item Weight | 0.8 Pounds |
| Manufacturer | 3M |
| Material Type | Polyurethane |
| Model | 3004.7819 |
| Number Of Pieces | 1 |
| Other Special Features Of The Product | Strong |
| Part Number | 00051135065600 |
| Specific Uses For Product | boating |
| Tensile Strength | 300 Pounds Per Square Inch |
| Unit Count | 37854.08 Milliliters |
| Upc | 051135065600 |
| Volume | 295 Milliliters |
| Water Resistance Level | Water Resistant |
User
Very good product
I used this product to seal up bolts on a boat transom. I was able to use it to seal the tube shut, then use it again several weeks later. It starts to cure very quickly, so if you want to tidy is up your seams then you only have a few minutes before it’s too thick to manipulate into a uniform joint.
User
Qualité
Qualité de l’adhésif
User
Buenisimo
Buenisimo y el precio magnífico
User
Great adhesive for fibreglass
Great product ! Easy to apply. Used it to repair a fibreglass trailer. Results were better than expected. Easily sanded off the excess adhesive.
User
EXCELLENT, WORKED GREAT TO STOP THE LEAK IN OUR CAMPER.
Had a slight leak in the caulking of our “new to us” camper so we removed the caulking and used this #M Marine Sealent. Cure time was fairly fast, just as advertised. We were expecting major storms the next several days and after 6 straight days of hard rain we were pleased there was no leaking. The application was easy. I recommend cutting the tip at an angle to get a small beading. It did dry with slight coloration. It is not a white/white. I felt the cost was a bit much, but it’s the first time I’ve bought sealant of this nature. That said…. The price I spent on this single tube- and the excellent job it did at stopping the leak was priceless! Will buy again when/ if the need arises in any other locations on the camper. So in that sense, GREAT value for our money!!
Trustpilot
2 days ago
1 month ago