---
product_id: 391095479
title: "Better Boat Marine Sealant and Adhesive Waterproof Marine Grade Sealant for and RV - White 10oz"
brand: "better boat"
price: "€ 51.96"
currency: EUR
in_stock: true
reviews_count: 5
category: "Better Boat"
url: https://www.desertcart.ie/products/391095479-better-boat-marine-sealant-and-adhesive-waterproof-marine-grade-sealant
store_origin: IE
region: Ireland
---

# Waterproof above & below waterline UV & saltwater resistant flexible bond Multi-surface adhesion: fiberglass, metal, wood Better Boat Marine Sealant and Adhesive Waterproof Marine Grade Sealant for and RV - White 10oz

**Brand:** better boat
**Price:** € 51.96
**Availability:** ✅ In Stock

## Summary

> 🛥️ Seal it once, sail forever — the last marine sealant you'll ever need!

## Quick Answers

- **What is this?** Better Boat Marine Sealant and Adhesive Waterproof Marine Grade Sealant for and RV - White 10oz by better boat
- **How much does it cost?** € 51.96 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/391095479-better-boat-marine-sealant-and-adhesive-waterproof-marine-grade-sealant)

## Best For

- better boat enthusiasts

## Why This Product

- Trusted better boat brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Flexible & Durable:** Expands, contracts, and bends with weather changes without cracking or losing adhesion.
- • **Multi-Surface Master:** Bonds securely to fiberglass, glass, metal, plastic, and wood for versatile marine and RV repairs.
- • **Fast-Cure & Paintable:** Cures white quickly, sands smooth, and accepts paint for a flawless finish that blends in.
- • **Trusted American Quality:** Made in the USA by boaters for boaters, backed by 500,000+ satisfied customers.
- • **Ultimate Waterproof Seal:** Heavy-duty elastomeric formula that stops leaks above and below waterline with lasting strength.

## Overview

Better Boat Marine Sealant is a premium, heavy-duty elastomeric adhesive designed for superior waterproof sealing above and below the waterline. It offers a flexible, permanent bond resistant to UV rays and saltwater, adhering to multiple surfaces including fiberglass, metal, and wood. Fast curing and paintable, this American-made sealant is trusted by over half a million customers for marine, RV, and home repairs.

## Description

Our premium marine waterproof adhesive sealant works like a sealant, caulk and superglue all in one that can be used above and below the waterline while offering superior long-lasting performance that stands up to sunlight and saltwater. It can be used to fix ed seams, joints, patch tears, as an aluminum boat sealant, aquarium sealent, to fix pools, for home repairs and more. Our above and underwater sealant is suitable for all climates as it is flexible while maintaining superior sealing abilities as it expands and compress without compromising the seal, our boat sealant cures white then can be sanded and painted any color to suit your needs. We proudly stand behind the quality of all our products! We are a family owned American business committed to making premium quality products. MADE IN USA

Review: Easy to use, good adherence
Review: looks good, dries fast, and is an excellent product.

## 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, d, trade-secret standards and you will find this premium marine sealant is no exception.
- WHY BETTER BOAT: An American company with over 500,000 happy customers and 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07V5QDLR4 |
| Batteries Included? | No |
| Brand | Better Boat |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (380) |
| Date First Available | 2 February 2020 |
| Item model number | BB-MRSL-WHT |
| Manufacturer | Better Boat |
| Material Type | Elastomer |
| Package Dimensions | 29.21 x 4.83 x 4.83 cm; 283.5 g |

## Product Details

- **Brand:** Better Boat
- **Colour:** White
- **Item form:** Paste
- **Item weight:** 10 Ounces
- **Liquid volume:** 10 Fluid Ounces

## Images

![Better Boat Marine Sealant and Adhesive Waterproof Marine Grade Sealant for and RV - White 10oz - Image 1](https://m.media-amazon.com/images/I/61hsul+wXbL.jpg)
![Better Boat Marine Sealant and Adhesive Waterproof Marine Grade Sealant for and RV - White 10oz - Image 2](https://m.media-amazon.com/images/I/719X7t-A+mL.jpg)
![Better Boat Marine Sealant and Adhesive Waterproof Marine Grade Sealant for and RV - White 10oz - Image 3](https://m.media-amazon.com/images/I/71VKe8tRGOL.jpg)
![Better Boat Marine Sealant and Adhesive Waterproof Marine Grade Sealant for and RV - White 10oz - Image 4](https://m.media-amazon.com/images/I/71Ye+ZFdElL.jpg)
![Better Boat Marine Sealant and Adhesive Waterproof Marine Grade Sealant for and RV - White 10oz - Image 5](https://m.media-amazon.com/images/I/71uJ0Un9j-L.jpg)

## Questions & Answers

**Q: What color is this when cured?**
A: This is white.  Hope that helps and thanks for your interest in our marine sealant.

**Q: can I use this to repair a crack in my hot tub? Is it safe for continual underwater use?**
A: Yes it is safe for continued underwater use but you will want to make sure it completely cures and dries prior to submerging it.  Hope that helps and thanks for your interest in Better Boat

**Q: How many Ounces is in a container**
A: Don’t have it in front of me, but it is the size of a normal tube of caulk and will fit into a standard caulk gun.

**Q: Will this work around my stainless steel fuel tank filler neck**
A: Yes our marine sealant will absolutely seal and adhere to your stainless steel neck. Thanks so much for your interest in our marine sealant.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***E on 22 April 2025*

Easy to use, good adherence

### ⭐⭐⭐⭐⭐ Review
*by D***C on 9 February 2025*

looks good, dries fast, and is an excellent product.

### ⭐⭐⭐⭐⭐ Review
*by R***N on 17 October 2024*

Bon produit. Fait pour mon bateau de plaisance au plancher. sèche vite et résistant aux intempéries. Je recommande pour les bateaux.

## Frequently Bought Together

- Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High-Temperature Water Sealant for Boat, Auto, and RV, Silicone-Free, White, 1 Tube, 10 Oz
- 3M Marine Adhesive Sealant Fast Cure 5200 (05220) Permanent Bonding and Sealing for Boats and RVs Above and Below the Waterline Waterproof Repair, White, 3 fl oz Tube
- Stainless Steel Boat Drain Plug Kit, 1/2" Threaded Transom Plug, Marine-Grade Garboard Thru-Hull Drain Plug

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**Shop now:** [https://www.desertcart.ie/products/391095479-better-boat-marine-sealant-and-adhesive-waterproof-marine-grade-sealant](https://www.desertcart.ie/products/391095479-better-boat-marine-sealant-and-adhesive-waterproof-marine-grade-sealant)

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-18*