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⚓ Seal your adventure with confidence—marine-grade strength that won’t let you down!
3M Marine Grade Silicone Sealant is a premium, one-component silicone designed specifically for above-waterline sealing on boats and RVs. It offers fast curing in 24-48 hours, superior adhesion to multiple surfaces, and long-lasting flexibility that resists weather, mildew, and yellowing. Ideal for professionals and enthusiasts who demand a durable, clean, and reliable seal to protect and maintain their watercraft’s pristine look.
| ASIN | B000N9RVAA |
| Best Sellers Rank | #26,163 in Automotive ( See Top 100 in Automotive ) #126 in RV Sealants |
| Brand | 3M |
| Brand Name | 3M |
| Color | White |
| Compatible Material | Fiberglass, Glass, Metal, Plastic |
| Customer Reviews | 4.7 out of 5 stars 1,883 Reviews |
| Global Trade Identification Number | 00051135080276 |
| Included Components | 3M 08027 Marine Grade Silicon Sealant - 1/10 Gallon Cartridge, White |
| Item Dimensions | 8.5 x 6.5 x 12.25 inches |
| Item Form | Liquid |
| Item Type Name | 3M Marine Grade Silicone Sealant, 08027, For Boats and RVs, Above the Waterline Interior/Exterior Sealing, White, 10.3 fl oz Cartridge |
| Item Weight | 12.6 Ounces |
| Item dimensions L x W x H | 8.5 x 6.5 x 12.25 inches |
| Manufacturer | 3M |
| Material | Silicone |
| Material Type | Silicone |
| Model | MG Sil |
| Number of Items | 1 |
| Part Number | 051135080276 |
| Style | 10.3 fl oz (Cartridge) |
| Style Name | 10.3 fl oz (Cartridge) |
| Surface Recommendation | Wall |
| UPC | 051135080276 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |
M**C
great sealant, holds up on the water
Used this for sealing some fittings on my boat and it worked exactly as expected, no leaks at all and it's held up through sun and water exposure without cracking or pulling away. The cap seals well so the tube doesn't cure between uses which is a huge deal with silicone products since they can dry out fast. Only minor thing is the dispenser cap threads can be a little finicky if you push sideways on them but that's pretty minor overall. Solid marine silicone from a brand you can trust and I'd buy it again.
R**R
Great product!
Great product!
J**F
Good marine grade silicone
Needed some marine grade silicone for some fittings on my camper and this worked perfectly. Put the cap on after you're done and the product doesn't cure in the tube and become a solid mess like some other products. The only thing which doesn't work well is the threaded screw-on dispenser cap. The thread will strip with too much lateral pressure, which always happens to me. Also, do yourself a favor and purchase one of those metal tube keys that help you squish material out of a metal tube. It will save your fingers from exessive squishing, lol.
A**S
Great product! Works great! Highly recommend!
Great product! Works great! Highly recommend!
A**O
Good stuff
This is some serious sealant. But the bottom end popped on me so be careful.
L**R
Fixed car leak
We used this sealant to seal some cracks in our Honda that were causing water leaks. This product was easy to apply and sealed the cracked that was causing the water leak. I would recommend this sealant as a cheap and easy solution for water leaks in cars.
W**I
As advertised
This product, works completely as advertised. Nothing adheres any better, above or below the Waterline. My only complaint (why I gave value for money only 4 stars) is that they don't make it in any smaller quantities. Often times, you just don't need 3 fl ozs. And once you open the tube, and the air hits the end, you can't put the genie back in the bottle. It's all going to harden, used on the project, or left in the tube :-(
D**E
3M marine grade silicone
Great stuff for my boat on installing new equipment
Trustpilot
2 months ago
2 months ago