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Better Boat Marine Sealant is a 10 oz black, silicone-free, elastomeric caulk designed for superior waterproof sealing and adhesion on boats, RVs, and autos. It offers a flexible, permanent bond that resists UV rays, saltwater, and extreme temperatures, curing fast and allowing sanding and painting. Made in the USA, it works on multiple surfaces including fiberglass, metal, wood, and glass, ensuring durable repairs above and below the waterline.


























































| ASIN | B09T8HKH61 |
| Best Sellers Rank | #49,590 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #99 in Silicone Caulk |
| Brand Name | Better Boat |
| Color | Black |
| Customer Reviews | 4.3 4.3 out of 5 stars (717) |
| Item Form | Liquid |
| Item Weight | 10 Ounces |
| Liquid Volume | 295.74 Milliliters |
| Manufacturer | Better Boat |
| Material Type | Elastomeric |
| Surface Recommendation | Door, Gutter, Pipe, Sink, Tile, Tub, Walls, Window |
| UPC | 850033414172 |
| Unit Count | 10.0 Ounce |
| Water Resistance Level | Waterproof |
B**Z
Works!
Works as advertised. I used it to reinforce boat flooring that I repurposed as cover for the benches on a small vintage fishing boat. After a few months out on the water, this produce still sticks like the day I installed the flooring. Good produce for marine use.
L**T
Very satisfied with waterproofing
Very nice and so far working great Only negative is the applying tube was bent about 45 degrees. Package was not damaged at all. I bent it back straight and was able to use
T**B
Easy to use
Worked great. Stopped a small leak around a screw in my kayak. Very sticky and messy to apply. A tapered tip would make it easier and less messy to apply to small areas. Probably should have worn gloves when using. As it sticks to everything it touches. I only needed a small amount, and I have plenty left over.
J**N
Great product, Great customer service.
Great stuff. miracle material. underwater, overwater, quick cure, etc. the first tube that I bought- stuff is thick, as I was squeezing it, it leaked at the crimp and also around the round transition on top- I may have been squeezing too hard (?) or didn't cut the nozzle as big as I needed. reached out to company- they have a satisfaction guarantee. and they painlessly sent me another tube. !!!
M**Y
Excellent Adhesive
This sets up very quickly, yet takes a long time to cure. Stays pliable weeks later. Highly recommend. Wish it came in a larger tube.
C**R
Seller and product both failures.
This product was used for a small hole and failed significantly. Although the seller says he will stand behind this product he does not at all..
K**N
For The Cost, I'm NOT Impressed!
I should send it all BACK. First off, the design of the tube is ridiculous. Try as I might, I couldn't get it to fit a standard caulking gun. Never in my life have I EVER had trouble with any other product not immediately fitting a caulking gun. It should drop in at once with NO hassle and be ready to use. NOT THIS STUFF! It was a complete and expensive waste costing 20 bucks a tube. I'm going to back to DICOR and other products I've used for years when resealing my two camping trailers. I threw this junk into a box in my shed where it'll likely remain for the rest of my life. I don't give a damn how good the product's supposed to be when you can't even get the damned tube into a caulking gun! Buyer beware. If there were a way to rate this stuff as a -50, I'd damn well DO IT. Save your money and your sanity and stick with the far better known and much easier to use other products that have been around for years long than this crap. If they can't even design a standard, ready to use tube, I wouldn't put much faith in the product, either.
D**G
Worked good but has longer cure times
It worked good for my application (garage siding contact with my concrete). Applied easily and good sealing. It skinned over in about 30 minutes to an hour so I had time to work with it but it takes 7 to 10 days to cure depending on temperature, humidity and quantity used and customer service said that a 100 percent cure may take up to 30 days. It did get relatively hard in 5 days and did repel rain after it skinned over. I wanted a clear caulk/sealant and I would use it again where cure times are not critical. The end cap ring on a few tubes was oversized - so it was a tight fit getting it in and out of the caulking gun and the end cap ring came off when I took the tube out of the caulking gun - I had to pry the end cap ring out of the caulking gun which wasn't too hard to do but with the end cap ring off now it would be easier to get the tube back into the caulking gun next time and it didn't affect the operation of the tube.
J**E
Easy to use, good adherence
D**C
looks good, dries fast, and is an excellent product.
R**N
Bon produit. Fait pour mon bateau de plaisance au plancher. sèche vite et résistant aux intempéries. Je recommande pour les bateaux.
M**T
J’ai essayé de remplir les vides entre les planches du pont de mon bateau,il y a eu trop de retrait mais devrais faire pour autre chose
A**R
still havent used it but im sure its ok. Purchased to seal holes on transom that will hold swim ladder.
Trustpilot
3 weeks ago
2 months ago