Search  for anything...
Better Boat

Marine Sealant and Adhesive Waterproof Marine Grade Sealant Caulk High Temp Caulking Water Sealant for Boat Auto and RV Without Silicone - 1 Tube Gray 10oz

    • Based on 594 reviews
Condition: New
Checking for product changes
$25.99 Why this price?

Buy Now, Pay Later

As low as $6 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

Non-returnable due to hazmat safety reasons

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Nov 28
Order within 11 hours and 47 minutes
Available payment plans shown during checkout

Color: Gray


Features

  • HEAVY-DUTY ELASTOMERIC SEALANT: Waterproof long-lasting superior strength above & below waterline to repair seams and stop leaks. Seal ports, wind-shields and more. Remains Flexible and can twist, bend, expand and contract with weather conditions.
  • FLEXIBLE PERMANENT BOND UV LIGHT AND SALTWATER RESISTANT: One-part sealant that forms a tough yet flexible permanent bond resistant to sunlight, rain, fresh & salt-water. Fast cure formula cures white then can be sanded and painted unlike silicone.
  • SEALS & ADHERES TO MULTIPLE SURFACES: Marine Adhesive works with fiberglass, glass, plastic, metal & wood. Safely and securely repairs windshields, joints, hardware, aluminum boats, pool decks, aquarium sealent , pool caulking , RV and Auto repairs.
  • MADE IN THE USA & EXCEPTIONAL QUALITY: Made by boaters for boaters, our waterproof sealant and other products are made to strict, tested, trade-secret standards and you will find this premium marine sealant is no exception.
  • WHY BETTER BOAT: An American company offering a line of premium quality boat detailing supplies. We offer the tools and products needed to make caring for your boat easier so you can spend more time on the water.

Color: Gray


Brand: Better Boat


Item Weight: 10 Ounces


Item Form: Foam


Water Resistance Level: Waterproof


Package Dimensions ‏ : ‎ 11.18 x 1.93 x 1.93 inches; 10 ounces


Item model number ‏ : ‎ BB-MRSL-GRY


Date First Available ‏ : ‎ March 31, 2023


Manufacturer ‏ : ‎ Better Boat


Country of Origin ‏ : ‎ USA


Best Sellers Rank: #6,176 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #18 in Silicone Caulk


#18 in Silicone Caulk:


Customer Reviews: 4.4 4.4 out of 5 stars 594 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Nov 28

This item is non-returnable:

Non-returnable due to hazmat safety reasons

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Sealing leaks
Color: Clear
Product was just as expected ! Used it on my boat to make sure seams were sealed , well worth the cost !
Reviewed in the United States on March 8, 2024 by U.P. Yooper
    • Great product
Color: Clear
Great product. Multiple uses. Sealed outside of motorhome roof great! Easy to use. Will use for more projects around the house.
Reviewed in the United States on February 12, 2024 by Momma C
    • This works
Color: Clear
Works great. Only there is not product. I had to buy a second one to fix where our cleats came apart.
Reviewed in the United States on August 3, 2023 by Nancy M
    • Great sealant for boat.
Color: Gray
little bit costly but apllied and dried perfectly evcellent product.
Reviewed in the United States on April 13, 2024 by Amazon Customer
    • Works great
Color: Gray
Very nice stuff to work with , high quality. At first I was thinking it was a little expensive, but after using it I can see why it was a little more than the other guys . Very nice stuff people, keep up the good work !! Oh yeah and it’s made in the USA.
Reviewed in the United States on January 6, 2024 by Inch
    • Worked good but has longer cure times
Color: Clear
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. ... show more
Reviewed in the United States on September 25, 2022 by Dan Ullberg
    • It works!
Color: White
After several frustrating weeks trying to repair a small crack in a polyethylene hot tub Marine Sealant did the trick. The consistency was perfect to adhere and seal a small aluminum patch over the crack. It did take about a week to cure but remains pliable enough to move as the tub expands and contracts. So far so good. ... show more
Reviewed in the United States on November 5, 2023 by Joseph W. Howard
    • For The Cost, I'm NOT Impressed!
Color: White
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. ... show more
Reviewed in the United States on August 17, 2021 by Ken

Can't find a product?

Find it on Amazon first, then paste the link below.