---
product_id: 32639628
title: "Rubber Sealant Coating, Waterproof, Black, 32 oz"
brand: "flex seal liquid"
price: "$143.47"
currency: USD
in_stock: true
reviews_count: 13
category: "Flex Seal Liquid"
url: https://www.desertcart.ec/products/32639628-rubber-sealant-coating-waterproof-black-32-oz
store_origin: EC
region: Ecuador
---

# 100% waterproof sealant UV resistant for lasting protection 32 oz versatile liquid rubber Rubber Sealant Coating, Waterproof, Black, 32 oz

**Brand:** flex seal liquid
**Price:** $143.47
**Availability:** ✅ In Stock

## Summary

> 💧 Seal the deal with Flex Seal – where leaks meet their match!

## Quick Answers

- **What is this?** Rubber Sealant Coating, Waterproof, Black, 32 oz by flex seal liquid
- **How much does it cost?** $143.47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/32639628-rubber-sealant-coating-waterproof-black-32-oz)

## Best For

- flex seal liquid enthusiasts

## Why This Product

- Trusted flex seal liquid brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-Surface Mastery:** Works seamlessly on wood, metal, glass, plastic, and PVC
- • **Ultimate Leak Stopper:** Brush, roll, dip, or pour on for instant watertight sealing
- • **Fast-Cover, Long-Lasting:** Smooth application with quick coverage and durable finish
- • **Rust & Corrosion Defender:** Protects metal and masonry from environmental damage
- • **Flexible Rubberized Shield:** Adapts to surfaces, preventing cracks and leaks under stress

## Overview

Flex Seal Liquid Rubber Sealant Coating is a 32 oz black, waterproof, and UV-resistant liquid rubber that can be brushed, rolled, dipped, or poured onto multiple surfaces. It provides a flexible, durable barrier that stops leaks fast while preventing rust and corrosion, making it ideal for roofs, basements, RVs, gutters, and masonry. Trusted by thousands with a 4.5-star rating, it’s the go-to solution for professional-grade waterproofing and protection.

## Description

desertcart.com: Flex Seal Liquid Rubber Sealant Coating, Waterproof, Black, 32 oz | Stops leaks fast, brush, roll, dip or pour on, UV resistant, prevents rust, corrosion, roof, basement, RV, gutters, masonry : Tools & Home Improvement

Review: Crazy good stuff - I have a 20 year old 5th wheel camper that has 2 clear plastic skylights. They started cracking around the edges about a year ago and were getting very brittle and started leaking water inside. Although I didn’t, you could’ve put your finger right through the skylights, they were so thin and weathered. The camper isn’t worth much anymore, so I wasn’t going to spend the money for new skylights. I wanted a quality clear sealant to brush on over the skylights, so it still let light in. This clear Flexseal fit the bill. After brushing 2 coats on them, they are as strong as they were when they were new. It stiffened them up tremendously and I’ve have no more leaks. I’m good for the rest of the camping season.
Review: Amazing Flex Seal for Old Wood Boat Seats - Flex Seal is amazing and easy to apply. I needed to waterproof my fishing boat wooden seats that were the old school of paint on them and they needed some tinder loving care to get them back to a good state. I sanded the wood seats to get a good surface first, then applied the Flex Seal. OMG after a first coat I was amazed how well it adhered to the old plywood seats! Heads up though, do the prep work first, then apply the Flex seal with a good brush with even strokes in one direction. Allow it to be done in warm clear weather as it will take awhile to fully cure. I let it dry for a full week. Amazing finish in the final result. It is waterproof now too! Love it. I used the light gray.

## Features

- Flex Seal Liquid is liquid rubber in a can! Now you can brush, roll, dip or pour it on!
- Use anywhere you need a watertight, flexible rubberized coating
- Goes on smooth and covers fast, sealing out water, air and moisture
- UV Resistant
- Prevents rust and corrosion. Chemical resistant

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01GFYA5IG |
| Best Sellers Rank | #1,368 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #5 in Hardware Sealers |
| Brand | Flex Seal Liquid |
| Brand Name | Flex Seal Liquid |
| Color | Black |
| Compatible Material | Rubber |
| Customer Reviews | 4.5 out of 5 stars 14,079 Reviews |
| Global Trade Identification Number | 00853517006290 |
| Included Components | LFSBLKR32 |
| Item Dimensions | 4.75 x 4.25 x 4.25 inches |
| Item Form | Liquid |
| Item Highlight | Stops leaks fast, brush, roll, dip or pour on, UV resistant, prevents rust, corrosion, roof, basement, RV, gutters, masonry |
| Item Type Name | LFSBLKR32 |
| Item Weight | 2 pounds |
| Item dimensions L x W x H | 4.75 x 4.25 x 4.25 inches |
| Manufacturer | SWIFT RESPONSE LLC |
| Material | Rubber |
| Material Type | Rubber |
| Model | LFSBLKR32 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | LFSBLKD32BC |
| Style | LFSBLKR32 |
| Style Name | LFSBLKR32 |
| Surface Recommendation | Wood, Metal, Glass, Plastic, PVC |
| UPC | 853517006290 |
| Unit Count | 1 Count |
| Warranty Description | 1 Year Limited |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Flex Seal Liquid
- **Item Weight:** 2 pounds
- **Item dimensions L x W x H:** 4.75 x 4.25 x 4.25 inches
- **Material:** Rubber
- **Style:** LFSBLKR32

## Images

![Rubber Sealant Coating, Waterproof, Black, 32 oz - Image 1](https://m.media-amazon.com/images/I/81TV0ebuvwL.jpg)

## Available Options

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

## Questions & Answers

**Q: Can i use this to seal the bottom of camping trail made of plywood would it make the bottom water proof to the road conditions?**
A: Hi there. Thank you so much for reaching out with your question. Yes, Flex Seal Liquid will effectively coat and seal the bottom of the trailer and protecting it from water. However, road conditions may require you to reapply coats from the wear and tear put through time. Please let us know how it turns out for you. Please message us with any other questions. We're always happy to help.

**Q: Can this be used to repair a spring box?**
A: Thank you for reaching out! 
We have not tested Flex Seal Liquid for this type of application.
Lucas - Customer Care at Flex Seal Products
(Swift Response - The makers of Flex Seal Liquid)

**Q: Will it it hold a little crack on the thread of water tank causing pressure lost?**
A: Hi there, great question! We cannot guarantee that Flex Seal Liquid will hold on the crack due to the fact that it is not meant to withstand high PSI.

**Q: Can this be used to repair cracking finish on metal garden posts?**
A: Yes. Keep in mind it’s rubber so apply accordingly

## Customer Reviews

### ⭐⭐⭐⭐⭐ Crazy good stuff
*by T***J on September 8, 2026*

I have a 20 year old 5th wheel camper that has 2 clear plastic skylights. They started cracking around the edges about a year ago and were getting very brittle and started leaking water inside. Although I didn’t, you could’ve put your finger right through the skylights, they were so thin and weathered. The camper isn’t worth much anymore, so I wasn’t going to spend the money for new skylights. I wanted a quality clear sealant to brush on over the skylights, so it still let light in. This clear Flexseal fit the bill. After brushing 2 coats on them, they are as strong as they were when they were new. It stiffened them up tremendously and I’ve have no more leaks. I’m good for the rest of the camping season.

### ⭐⭐⭐⭐⭐ Amazing Flex Seal for Old Wood Boat Seats
*by Y***G on July 6, 2026*

Flex Seal is amazing and easy to apply. I needed to waterproof my fishing boat wooden seats that were the old school of paint on them and they needed some tinder loving care to get them back to a good state. I sanded the wood seats to get a good surface first, then applied the Flex Seal. OMG after a first coat I was amazed how well it adhered to the old plywood seats! Heads up though, do the prep work first, then apply the Flex seal with a good brush with even strokes in one direction. Allow it to be done in warm clear weather as it will take awhile to fully cure. I let it dry for a full week. Amazing finish in the final result. It is waterproof now too! Love it. I used the light gray.

### ⭐⭐⭐⭐ A little expensive, but it does the job.
*by G***R on April 6, 2026*

I used this on a steel trash can that I store bird seed in. The top had a gash in it and no matter what I did, water would get in and ruin the seed. I hated to throw it away since that was the only problem. A can of this, and the problem was solved. It's a little spendy for the amount you get which is why I removed 1 star. But there's no question it works good. My only other gripe is that it takes a long time to set up and dry. So if you can keep your project level and dry for 24 hours, that will go a long way to helping it cure. I just used a disposable paint brush to apply it and I kept the now hard brush for future applications. It's fairly durable depending on what you're trying to accomplish. I tried using it on the feet of my deck chairs hoping it would save wear and tear on my deck? Not a good idea, it just fell off after a couple of uses. But for sealing, this is a good product.

## Frequently Bought Together

- Flex Seal Liquid Rubber in a Can, 32-oz, Black
- Gorilla Waterproof Patch & Seal Clear Spray 14oz
- Gorilla Waterproof Patch & Seal Tape 4" X 10' Black, Pack Of 1

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**Shop now:** [https://www.desertcart.ec/products/32639628-rubber-sealant-coating-waterproof-black-32-oz](https://www.desertcart.ec/products/32639628-rubber-sealant-coating-waterproof-black-32-oz)

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-10-21*