---
product_id: 14871374
title: "Liquid Rubber Waterproof Sealant - Roof & Gutter Coating, Black, 1 Gallon | DIY Leak Repair Coating, Flexible Elastomeric Waterproofing Membrane for Flat & Low-Slope Roofs, Gutters, Concrete, Plywood"
brand: "liquid rubber"
price: "¥55286"
currency: JPY
in_stock: true
reviews_count: 13
category: "Liquid Rubber"
url: https://www.desertcart.jp/products/14871374-liquid-rubber-waterproof-sealant-roof-and-gutter-coating-black-1
store_origin: JP
region: Japan
---

# UV resistant & crack-proof durability 950% elongation for ultimate flexibility Covers up to 30 sq ft per gallon on vertical surfaces Liquid Rubber Waterproof Sealant - Roof & Gutter Coating, Black, 1 Gallon | DIY Leak Repair Coating, Flexible Elastomeric Waterproofing Membrane for Flat & Low-Slope Roofs, Gutters, Concrete, Plywood

**Brand:** liquid rubber
**Price:** ¥55286
**Availability:** ✅ In Stock

## Summary

> 💪 Seal the deal with Liquid Rubber — where durability meets flexibility!

## Quick Answers

- **What is this?** Liquid Rubber Waterproof Sealant - Roof & Gutter Coating, Black, 1 Gallon | DIY Leak Repair Coating, Flexible Elastomeric Waterproofing Membrane for Flat & Low-Slope Roofs, Gutters, Concrete, Plywood by liquid rubber
- **How much does it cost?** ¥55286 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/14871374-liquid-rubber-waterproof-sealant-roof-and-gutter-coating-black-1)

## Best For

- liquid rubber enthusiasts

## Why This Product

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

## Key Features

- • **Pro-Level Coverage:** Effortlessly apply by brush, roll, or spray—1 gallon covers up to 30 sq ft vertically, ensuring efficient, professional-grade results.
- • **Unmatched Flexibility:** Stretches over 9x its length to resist cracking and peeling despite building shifts and weather extremes.
- • **Eco-Friendly & Odorless:** Water-based, VOC-free formula safe for indoor/outdoor use and sensitive materials—no harsh fumes, no compromise.
- • **Trusted by Pros & DIYers:** Millions of gallons sold, delivering reliable leak repair and waterproofing that keeps your property protected and your peace of mind intact.
- • **Industrial-Strength Waterproofing:** Seamlessly shields roofs, gutters & foundations with a premium bitumen formula that outperforms traditional tar.

## Overview

Liquid Rubber Waterproof Sealant is a premium, water-based bitumen coating designed for flat and low-slope roofs, gutters, and concrete surfaces. Offering over 950% elongation and superior UV resistance, it creates a flexible, durable waterproof membrane that outlasts traditional tar. Easy to apply by brush, roll, or spray, it covers up to 30 sq ft per gallon on vertical surfaces and is VOC-free, making it safe for indoor and outdoor use. Trusted by professionals and DIYers alike, it’s the go-to solution for long-lasting leak repair and preventative maintenance.

## Description

Liquid Rubber Waterproof Sealant - Roof & Gutter Coating, Black, 1 Gallon | DIY Leak Repair Coating, Flexible Elastomeric Waterproofing Membrane for Flat & Low-Slope Roofs, Gutters, Concrete, Plywood: desertcart.com: Tools & Home Improvement

Review: Easy to use - I waited to post this review until it rained to give honest feed back. I had a horrible leak in my garage. I bought this in hopes it would save me the cost of a roof repair. It did. Works well, easy to apply with a roller brush. My S.I.L. applied a thin coat as directed on a warm day. I had no problems with it curing at all. I would recommend this product to everyone and if the problem comes up again on another area of my roof I will not hesitate to buy this product again for that fix as well.
Review: Liquid Rubber Sealant - Purchased this Liquid rubber waterproof sealant for the roof on the greenhouse. Applied with ease and dried in a reasonable amount of time. Seems to be a good quality product and anyone needing such a product should consider this company.

## Features

- INDUSTRIAL STRENGTH BITUMEN FORMULA - Create a seamless waterproof membrane on flat roofs, metal roofs, low slope roofs, foundations, gutters, concrete surfaces, planter boxes, and more. Our premium liquid rubber forms a durable barrier against water infiltration where other sealants fail. Superior alternative to traditional roof tar or patch products
- SUPERIOR FLEXIBILITY & DURABILITY - With over 950% elongation, this waterproof sealant maintains adhesion even with building movement and temperature changes. Our sealant is designed to resist cracking, peeling, and UV damage. Creates a flexible rubberized coating that delivers long-lasting protection
- PROFESSIONAL COVERAGE SPECIFICATIONS - Brush, roll or spray on - For flat/low slope roofs & standing water surfaces: 1 gallon covers 15 sq ft (3-4 heavy coats to achieve 60-80 mil membrane). For vertical surfaces like foundations: 1 gallon covers 30 sq ft (2-3 heavy coats for 30 mil membrane). Ideal for both roof repair and preventative maintenance applications
- WATER-BASED ADVANCED FORMULA - Unlike harsh roof tar or solvent-based products, our water-based formula contains no VOCs or harmful odors, making it perfect for indoor and outdoor use. Doesn't damage foam insulation or sensitive materials. Perfect for waterproofing projects in confined spaces
- ENGINEERED WATERPROOFING SYSTEM - For maximum protection, use with Liquid Rubber Seam Tape or Geo-Textile to bridge joints, seams, vents, skylights, and protrusions where movement may occur. Creates a comprehensive waterproofing system for long-lasting leak repair and prevention on your roof, basement, or foundation
- USED BY PROFESSIONALS & DIYers ALIKE - With millions of gallons sold, Liquid Rubber is the go-to choice for contractors, property managers, and homeowners tackling projects from roof leak fixes to basement waterproofing. Our high-performance formula delivers professional results whether you're an experienced pro or a first-time DIYer
- PREMIUM ADHESION TECHNOLOGY - Superior adhesion to most building materials including metal, concrete, wood, and more. This hardware sealer can remain tacky after curing - NOT suitable for walking surfaces such as walkways, patios or decks. Use for waterproofing applications where foot traffic where foot traffic is minimal or not needed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00NI150Z8 |
| Best Sellers Rank | #6,119 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #21 in Hardware Sealers |
| Brand | Liquid Rubber |
| Brand Name | Liquid Rubber |
| Color | Original Black |
| Compatible Material | Multiple |
| Customer Reviews | 4.4 out of 5 stars 4,145 Reviews |
| Global Trade Identification Number | 00628421000012 |
| Included Components | 1 Gallon |
| Item Dimensions | 12 x 12 x 16 inches |
| Item Form | Liquid |
| Item Weight | 9 pounds |
| Item dimensions L x W x H | 12 x 12 x 16 inches |
| Manufacturer | Liquid Rubber USA |
| Material | Polymer |
| Material Type | Polymer |
| Model | 12602 |
| Number of Items | 1 |
| Part Number | 12602 |
| Style | Waterproof Sealant |
| Style Name | Waterproof Sealant |
| Surface Recommendation | Roof, Vent |
| UPC | 628421126026 |
| Unit Count | 128 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Liquid Rubber
- **Item Weight:** 9 pounds
- **Item dimensions L x W x H:** 12 x 12 x 16 inches
- **Material:** Polymer
- **Style:** Waterproof Sealant

## Images

![Liquid Rubber Waterproof Sealant - Roof & Gutter Coating, Black, 1 Gallon | DIY Leak Repair Coating, Flexible Elastomeric Waterproofing Membrane for Flat & Low-Slope Roofs, Gutters, Concrete, Plywood - Image 1](https://m.media-amazon.com/images/I/718p80gVGfL.jpg)

## Available Options

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

## Questions & Answers

**Q: How long does new concrete need to cure before applying liquid rubber?  We are sealing our new concrete pond with this product = will not have fish in**
A: New concrete needs to cure as per the installation instructions.  Applying any of the Liquid Rubber products or most waterproofing products prior to a full cure may compromise the curing process of the concrete.

**Q: I have a black plastic pond i got from home depot. will it adhere to that material?**
A: Yes, put a few coats on. Let each coat dry well (24)hrs . You can spray on inside of pond. I used a undercoating product used for undercoating cars for the outside of pond. I put 3 coats on. I let each coat dry for 2 days before applying the next coat. All worked great my pond is like new and no leaks and all of my goldfish are fat and happy! Good luck! Take your time and cover every spot even sides. Make sure the pond is very clean before u start applications. I used a ruff kitchen pot scrubber to scrub clean.

**Q: Does this project leave much of an odor after it has set?**
A: Haven't smelled any odor. When putting it on there is a usual rubber smell like a basketball, but it doesn't seem to last very long. And it  smells just like putting rubber on, which wasn't bad. It works for me.

**Q: what color is it when it dries?**
A: The product is brown when it is wet and black when it dries.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy to use
*by M***N on May 3, 2026*

I waited to post this review until it rained to give honest feed back. I had a horrible leak in my garage. I bought this in hopes it would save me the cost of a roof repair. It did. Works well, easy to apply with a roller brush. My S.I.L. applied a thin coat as directed on a warm day. I had no problems with it curing at all. I would recommend this product to everyone and if the problem comes up again on another area of my roof I will not hesitate to buy this product again for that fix as well.

### ⭐⭐⭐⭐⭐ Liquid Rubber Sealant
*by S***K on June 16, 2026*

Purchased this Liquid rubber waterproof sealant for the roof on the greenhouse. Applied with ease and dried in a reasonable amount of time. Seems to be a good quality product and anyone needing such a product should consider this company.

### ⭐⭐⭐⭐⭐ Worth the added price if you need a relatively thin water sealant.
*by P***3 on July 11, 2026*

Worked great for a rainwater leak between the neghibors cement wall and the new aluminum flashing I installed over the new framing of our basement Bilco doors. Taking advantage of a recent heat wave, in addition to heating up the liquid rubber container in some warm water prior to pouring really helped get the product thin enough to run down into some very tight spots. Wife and I used a large plastic medical syringe along with some 5/16" OD polyurethane tube that screwed perfectly into the Luer-Lock end of the syringe to inject the rubber into the problem areas. It was well worth the price, for our application, IMO.

## Frequently Bought Together

- Liquid Rubber Waterproof Sealant – DIY Leak Repair Coating for Flat, Metal & Low Slope Roofs, Foundations, Gutters & More – Flexible Protective Membrane - Black - 1 Gallon
- Liquid Rubber Geo-Textile - Fix Leaks - Repair and Restore - Easy to Use, 4 Inch x 160 Foot Roll
- Liquid Rubber Caulk - Hybrid Adhesive and Protective Sealant, White, 4 Pack

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**Shop now:** [https://www.desertcart.jp/products/14871374-liquid-rubber-waterproof-sealant-roof-and-gutter-coating-black-1](https://www.desertcart.jp/products/14871374-liquid-rubber-waterproof-sealant-roof-and-gutter-coating-black-1)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-08-03*