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🚤 Seal it fast, seal it right—stay afloat with 3M Marine Fast Cure!
3M Marine Adhesive Sealant Fast Cure 4200FC is a professional-grade, one-part polyurethane sealant that cures in 24 hours. Designed for marine environments, it forms flexible, waterproof bonds above and below the waterline with 300 psi tensile strength. Its semi-permanent formula resists cracking and peeling while allowing disassembly, making it ideal for boat repairs and maintenance.







| ASIN | B001QWN8VE |
| Best Sellers Rank | #2,449 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #23 in Adhesive Caulk #26 in Industrial Sealants #1,943 in Hardware |
| Brand | 3M |
| Brand Name | 3M |
| Color | White |
| Compatible Material | Wood |
| Container Type | Cartridge |
| Customer Reviews | 4.6 out of 5 stars 1,696 Reviews |
| Full Cure Time | 24 hours |
| Global Trade Identification Number | 00051135065600 |
| Included Components | One 10 Ounce Cartridge |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Type Name | 3M Marine Adhesive Sealant Fast Cure 4200 (06560) – Semi-Permanent Flexible Adhesive Sealant for Boats and RVs – White - 10 fl oz (295 mil) |
| Item Weight | 12.8 ounces |
| Manufacturer | 3M |
| Material | Polyurethane , Wood |
| Material Type | Polyurethane,Wood |
| Model | 3004.78 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Strong |
| Part Number | 00051135065600 |
| Special Feature | Strong |
| Specific Uses For Product | boating |
| Tensile Strength | 300 psi |
| UPC | 051135065600 |
| Unit Count | 10 Fluid Ounces |
| Viscosity Level | Medium |
| Volume | 295 ml |
| Water Resistance Level | Waterproof |
W**G
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!!
L**E
Came Smashed
This came packed between 2 12volt batteries. Needless to say fedup X handled with care( that they would ruin whatever was inside.) And that they accomplished as well as a professional demo team could! I used a spatula for what I could but there was a lot of waste, I will be buying at home dep. unless Amazon teaches the shipping packer of theirs how to pack, Amazon should have their people put in a shipped or packed by slip to get feedback on an employee that doesn't care about the quality of their work. Other than that the product was Great!
T**1
Holds up to Texas heat
Works as expected
K**P
I Recommend This Product
Fast shipping and quality product.
M**E
Product Quality
I wish there had been a clear version available. Outside of that I liked the product and the apparent adhesive qualities. The true test will be its sustainability in properly preparing and adhering two resin vases to a granite headstone. Hopefully it lasts for a very long time.
L**D
Great product!
Great product!
A**L
Buy again
Buy again
O**.
I had a good experience
It is looks good but I did not use yet
C**L
Qualité
Qualité de l’adhésif
E**S
Buenisimo
Buenisimo y el precio magnífico
K**N
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.
L**O
Es una silicon marina de muy buena calidad
Desde que conozco esta marca es la que uso. Quizá parezca cara pero es muy eficaz.
I**W
3M adhesives
Used this to seal the bottom of my leaky aluminium boat. Amazing adhesive that sticks to aluminium and does not wash off. Used it on another boat over 5 years ago and still water tight.
Trustpilot
1 day ago
2 months ago