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⚓ Seal it fast, seal it right—your boat’s best defense against water and wear!
Berkland’s 10oz Marine Adhesive Sealant 4000/4200 FC is a professional-grade, fast-curing polyurethane sealant designed for above and below waterline use. It delivers a flexible, semi-permanent bond that resists UV rays, weathering, and saltwater degradation. Easy to apply with no mixing required, this waterproof sealant is ideal for marine components like fiberglass, wood, and gelcoat, curing fully within 24 hours to provide durable, crack-resistant protection.
| ASIN | B0CNBFSCZF |
| Best Sellers Rank | #18,966 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #640 in Boating Equipment |
| Brand Name | Berkland |
| Color | White |
| Compatible Material | Marine Components |
| Container Type | Tube |
| Customer Reviews | 4.6 4.6 out of 5 stars (287) |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00860010716663 |
| Included Components | Nozzle |
| Item Form | Paste |
| Item Package Quantity | 1 |
| Item Weight | 13 Ounces |
| Manufacturer | Berkland |
| Material Type | Polyurethane |
| Model | 86001071 |
| Other Special Features of the Product | Crack Resistant |
| Specific Uses For Product | Marine |
| UPC | 860010716663 |
| Unit Count | 10.0 Ounce |
| Viscosity | Medium |
| Volume | 10 Fluid Ounces |
| Water Resistance Level | Waterproof |
C**S
Easy to use, economy product that works well.
Used to secure new wall panel in a boat locker. Works as designed. Easy to apply with caulk gun and after 24 hours it’s setting up and holding firm. Cleanup up is typical, paint thinner or stronger. No idea on longevity, but it appears to work properly. A huge savings over big brands. It does seem smoother or thinner than big brands but works well and is easier to use. I will purchase again on my next project.
L**R
Great marine adhesive
Good stuff. Worked well on the boat, and it adheres to silicone which is a plus. Has held up well in my last couple outings on the boat, so no complaints on water resistance.
T**E
So far, better than the brand name stuff
I used the 3m version of this that has started to crack after 2/3 years on my boat. After one use I am impressed with this, it applies smoother than 3m and has held up better over the past 3 months than the brand name stuff did. Much better value and it seals well. I will update this after a year or two.
C**B
Recommend
As described
J**G
The adhesive is fantastic. I will be buying again.
I have used this stuff for everything on my RV build. I even used it to melt a plastic block to my boat transom to melt my transducer. Highly recommended.
J**E
Good stuff, but hard to get it to flow out
Very hard to get it to flow out of the tube
J**H
Tight seal!
I used this to sandwich two pieces of plexi glass to my forward portal on my boat because it cracked and a new portal is thousands of dollars. So I cut two pieces of glass, sandwiched the portal, and then I sealed the edges with this cement. Voila! No more leaks and cost me a smidge of what a new one would cost. It dried pretty quick and was easy to use. Functions as it should!
E**D
excellent replacable nozzle
I am very pleased with this. Works great and the removable nozzle is easy to clean out the hardened material. I have used it sporadically over the past two months without the tube hardening. Impossible to do with 5200.
Trustpilot
3 weeks ago
4 days ago