---
product_id: 575146060
title: "Liquid Rubber Waterproof Sealant Black, 1 Gallon Covers up to 25-35 Sq ft| Roof Sealant Waterproof Coating for Indoor & Outdoor Leak Repair| Easy to Apply Waterproofing Foundation Sealer"
brand: "beest"
price: "¥39311"
currency: JPY
in_stock: true
reviews_count: 8
category: "Beest"
url: https://www.desertcart.jp/products/575146060-liquid-rubber-waterproof-sealant-black-1-gallon-covers-up-to
store_origin: JP
region: Japan
---

# UV & weather resistant Easy brush/roller application 30-80 mil durable membrane Liquid Rubber Waterproof Sealant Black, 1 Gallon Covers up to 25-35 Sq ft| Roof Sealant Waterproof Coating for Indoor & Outdoor Leak Repair| Easy to Apply Waterproofing Foundation Sealer

**Brand:** beest
**Price:** ¥39311
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal the deal with BEEST — waterproof confidence that lasts!

## Quick Answers

- **What is this?** Liquid Rubber Waterproof Sealant Black, 1 Gallon Covers up to 25-35 Sq ft| Roof Sealant Waterproof Coating for Indoor & Outdoor Leak Repair| Easy to Apply Waterproofing Foundation Sealer by beest
- **How much does it cost?** ¥39311 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/575146060-liquid-rubber-waterproof-sealant-black-1-gallon-covers-up-to)

## Best For

- beest enthusiasts

## Why This Product

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

## Key Features

- • **Proudly Made in the USA:** Backed by a family-owned company with 100% satisfaction guarantee and responsive customer support.
- • **DIY-Friendly Application:** Smooth, brush or roller-on formula that covers up to 35 sq ft per gallon with minimal prep.
- • **Extreme Weather Toughness:** Formulated with polymer-infused asphalt emulsion to withstand harsh temperatures and vibrations without cracking.
- • **Impenetrable Waterproof Barrier:** Creates a permanent, vapor-tight seal that defends your surfaces from moisture intrusion.
- • **Versatile Surface Compatibility:** Perfect for roofs, gutters, wood, metal, cement, and more—indoors or outdoors.

## Overview

BEEST Liquid Rubber Waterproof Sealant is a contractor-grade, polymer-enhanced asphalt emulsion that forms a tough, flexible, and UV-stable waterproof membrane. One gallon covers 25-35 sq ft depending on surface type, providing a durable 30-80 mil thick barrier ideal for indoor and outdoor leak repairs on multiple surfaces. Made in the USA, it offers easy brush or roller application and is designed to endure extreme weather conditions while ensuring long-lasting protection.

## Description

BEEST Liquid Rubber Waterproof Sealant Black, 1 Gallon Covers up to 25-35 Sq ft| Roof Sealant Waterproof Coating for Indoor & Outdoor Leak Repair| Easy to Apply Waterproofing Foundation Sealer: desertcart.com: Industrial & Scientific

Review: Great quality! - The sealability is great! Functionality is wonderful. Thickness is superb. Ease of application. Very durable. Love the fact that this stuff will last for a long time! Great quality for the price!
Review: Easy to apply. - Worked, easy to apply. Used a paint brush on a rubber roof.

## Features

- CONTRACTOR-GRADE WATERPROOF COATING: BEEST Waterproof Sealant creates an impenetrable barrier against water, providing ultimate damp-proofing and waterproofing for your surfaces. Its permanent bond and vapor barrier properties ensure your protection against moisture, making it the perfect waterproof coating for almost any job.
- Coverage Guidelines: For vertical surfaces, 1 gallon covers approximately 35 sq ft (2.8 sq m) with 3-4 heavy coats to achieve a 30 mil (0.76 mm) membrane. For flat or ponding surfaces, 1 gallon covers approximately 25 sq ft (1.4 sq m) with 4-5 heavy coats to achieve a 60-80 mil (1.5-2 mm) membrane.
- BUILT FOR EXTREME CONDITIONS: Our sealant is an ultra low VOC, heavy-duty asphalt emulsion infused with polymers. This unique formula ensures resilience against harsh temperatures, weather challenges, and vibrations, providing unwavering waterproof confidence in any situation. Its liquid rubber application dries to a tough, flexible, and UV-stable finish, making it the ideal choice for waterproofing projects indoors and outdoors.
- THE ULTIMATE DIY WATERPROOFER: BEEST Waterproof Sealant is tough and versatile enough to tackle almost any waterproofing project. Ideal for roofs, gutters, sheds, planter boxes, and more. From cement, brick, and block, to wood, metal, and more; BEEST Waterproof Sealant has you covered.
- NO HASSLE APPLICATION: Ensure surface is free of oil, grease, dirt, or other particles that could inhibit adhesion, open your pail of BEEST Waterproof Sealant and MIX THOROUGHLY. Apply with a brush or roller, working the coating into the substrate, at an approximate rate of 1 gallon per 25-35 sq. ft. for best results.
- MADE IN THE USA BY AMERICAN FAMILY-OWNED COMPANY: BEEST is a USA-based company located in Carlisle, Pennsylvania. All BEEST products have a 100% satisfaction guarantee and excellent USA customer service members waiting by the phone to answer any questions you may have. BEEST continues to work hard to deliver top-quality sealants and cleaners for your projects!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C7CTJTYP |
| Best Sellers Rank | #107,045 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #266 in Hardware Sealers |
| Brand | BEEST |
| Color | clear/colorless |
| Date First Available | June 7, 2023 |
| Item Form | Liquid |
| Item Weight | 8.07 pounds |
| Item dimensions L x W x H | 3.5 x 3.5 x 8 inches |
| Item model number | B-5020 |
| Manufacturer | Petra |
| Material | Rubber |
| Number of Items | 1 |
| Product Dimensions | 3.5 x 3.5 x 8 inches |
| Style | 1 Gallon |
| Surface Recommendation | Roof, Metal, Deck, Gutter, Basement |
| UPC | 810148640002 |
| Unit Count | 128.0 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** BEEST
- **Item dimensions L x W x H:** 3.5 x 3.5 x 8 inches
- **Material:** Rubber
- **Style:** 1 Gallon
- **Water Resistance Level:** Waterproof

## Images

![Liquid Rubber Waterproof Sealant Black, 1 Gallon Covers up to 25-35 Sq ft| Roof Sealant Waterproof Coating for Indoor & Outdoor Leak Repair| Easy to Apply Waterproofing Foundation Sealer - Image 1](https://m.media-amazon.com/images/I/71al1IFcuEL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great quality!
*by L***S on December 8, 2025*

The sealability is great! Functionality is wonderful. Thickness is superb. Ease of application. Very durable. Love the fact that this stuff will last for a long time! Great quality for the price!

### ⭐⭐⭐⭐ Easy to apply.
*by A***R on October 31, 2024*

Worked, easy to apply. Used a paint brush on a rubber roof.

### ⭐⭐⭐⭐⭐ Use gloves
*by A***D on September 20, 2025*

Very good product and easy to use

## Frequently Bought Together

- BEEST Liquid Rubber Waterproof Sealant Black, 1 Gallon Covers up to 25-35 Sq ft| Roof Sealant Waterproof Coating for Indoor & Outdoor Leak Repair| Easy to Apply Waterproofing Foundation Sealer
- BEEST Multi-Purpose Primer - Gray, 1 Gallon Covers up to 250 Sq Ft| Liquid Rubber Deck Coating - Elastomeric Roof Coating - Water-Based, High-Adhesion Bonding Primer for Concrete, Metal, Wood, TPO
- BEEST RV Roof Cleaner (32 Oz Super Concentrated Makes 5 gallons) - Roof Cleaner & Degreaser - Removes Dirt & Stains - Easy to Use - Best For Cleaning RVs, Campers, Trailer, Metal Building, Motorhomes

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**Shop now:** [https://www.desertcart.jp/products/575146060-liquid-rubber-waterproof-sealant-black-1-gallon-covers-up-to](https://www.desertcart.jp/products/575146060-liquid-rubber-waterproof-sealant-black-1-gallon-covers-up-to)

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