---
product_id: 186562713
title: "Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz"
brand: "better boat"
price: "A$67"
currency: AUD
in_stock: true
reviews_count: 13
category: "Better Boat"
url: https://www.desertcart.com.au/products/186562713-marine-sealant-and-adhesive-waterproof-marine-grade-caulk-high-temp
store_origin: AU
region: Australia
---

# 100% Waterproof & Saltwater Resistant High Temp Durable Sealant Multi-Surface Adhesion Power Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz

**Brand:** better boat
**Price:** A$67
**Availability:** ✅ In Stock

## Summary

> 🛥️ Seal it once, sail forever – the ultimate marine-grade bond!

## Quick Answers

- **What is this?** Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz by better boat
- **How much does it cost?** A$67 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/186562713-marine-sealant-and-adhesive-waterproof-marine-grade-caulk-high-temp)

## 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 & Weatherproof:** Expands, contracts, and stays flexible through all weather conditions.
- • **UV & Saltwater Resistant:** Permanent bond that won’t degrade under sun or saltwater exposure.
- • **Unmatched Waterproof Strength:** Seals leaks above & below waterline with heavy-duty elastomeric formula.
- • **Versatile Surface Compatibility:** Bonds securely to fiberglass, metal, wood, glass, and plastic.
- • **Made in the USA, Trusted by Boaters:** Premium quality marine sealant crafted by experts for lasting performance.

## Overview

This 10 oz tube of Better Boat Marine Sealant is a high-performance, waterproof, elastomeric caulk designed for marine, automotive, and RV applications. It forms a flexible, permanent bond resistant to UV rays, saltwater, and high temperatures, adhering to multiple surfaces like fiberglass, metal, and wood. Made in the USA, it cures fast, sands and paints easily, ensuring durable leak protection above and below the waterline.

## Description

Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz: desertcart.com: Industrial & Scientific

Review: 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.
Review: 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

## 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 with 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 |
| Best Sellers Rank | #52,823 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #105 in Silicone Caulk #697 in Industrial Sealants #71,068 in Hardware |
| Brand | Better Boat |
| Color | White |
| Date First Available | September 30, 2019 |
| Item Form | Liquid |
| Item Weight | 10 ounces |
| Item model number | BB-MRSL-WHT |
| Liquid Volume | 10 Fluid Ounces |
| Manufacturer | Better Boat |
| Material | Elastomeric |
| Number of Items | 1 |
| Package Dimensions | 11.5 x 1.9 x 1.9 inches |
| Surface Recommendation | Door, Sink, Tile, Tub, Walls, Window |
| UPC | 850009198198 |
| Unit Count | 10 Ounce |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Better Boat
- **Color:** White
- **Item Form:** Liquid
- **Item Weight:** 10 Ounces
- **Liquid Volume:** 10 Fluid Ounces

## Images

![Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz - Image 1](https://m.media-amazon.com/images/I/81vWUiLQghL.jpg)
![Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz - Image 2](https://m.media-amazon.com/images/I/8102h-9SdgL.jpg)
![Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz - Image 3](https://m.media-amazon.com/images/I/61hsul+wXbL.jpg)
![Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz - Image 4](https://m.media-amazon.com/images/I/719X7t-A+mL.jpg)
![Marine Sealant and Adhesive, Waterproof Marine Grade Caulk, High Temp Water Sealant for Boat, Auto, RV, Without Silicone - 1 Tube, White, 10 oz - Image 5](https://m.media-amazon.com/images/I/71uJ0Un9j-L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## 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

### ⭐⭐⭐⭐⭐ Works!
*by B***Z on November 29, 2025*

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.

### ⭐⭐⭐⭐⭐ Very satisfied with waterproofing
*by L***T on September 14, 2025*

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

### ⭐⭐⭐⭐ Easy to use
*by T***B on July 16, 2025*

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.

## 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.com.au/products/186562713-marine-sealant-and-adhesive-waterproof-marine-grade-caulk-high-temp](https://www.desertcart.com.au/products/186562713-marine-sealant-and-adhesive-waterproof-marine-grade-caulk-high-temp)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-13*