---
product_id: 45157256
title: "Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 5 Gal"
brand: "liquid rubber"
price: "¥130351"
currency: JPY
in_stock: true
category: "Liquid Rubber"
url: https://www.desertcart.jp/products/45157256-liquid-rubber-foundation-sealant-basement-waterproof-sealer-black-5-gal
store_origin: JP
region: Japan
---

# 50 sq ft/gallon indoor coverage 900% elongation for ultimate flexibility Waterproof membrane seals active leaks Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 5 Gal

**Brand:** liquid rubber
**Price:** ¥130351
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal the deal with Liquid Rubber – your foundation’s best defense!

## Quick Answers

- **What is this?** Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 5 Gal by liquid rubber
- **How much does it cost?** ¥130351 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/45157256-liquid-rubber-foundation-sealant-basement-waterproof-sealer-black-5-gal)

## 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

- • **Safe & Easy Application:** Water-based, zero VOC formula with no mixing required
- • **High Coverage Efficiency:** Covers up to 50 sq ft/gallon indoors with just 2-3 coats
- • **Complete Waterproofing Solution:** Seals active leaks and moisture better than traditional sealants
- • **Versatile Multi-Surface Adhesion:** Bonds seamlessly to concrete, wood, metal, and masonry
- • **Unmatched Flexibility & Durability:** 900% elongation ensures crack-proof, long-lasting protection

## Overview

Liquid Rubber Basement and Foundation Repair Sealant is a professional-grade, flexible waterproof coating designed for indoor and outdoor use. With 900% elongation, it creates a permanent waterproof membrane that seals active leaks and prevents future cracks on multiple surfaces including concrete, wood, and metal. Offering up to 50 sq ft/gallon coverage indoors and a zero VOC, water-based formula, it’s the ultimate solution for durable, safe, and efficient basement and foundation waterproofing.

## Description

Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black, 5 Gallon - desertcart.com

## Features

- SUPERIOR FLEXIBLE SEALANT: Liquid Rubber's foundation sealer creates a permanent waterproof membrane for basement waterproofing, foundation leak repair, shower liners, and planter boxes. This professional-grade sealer delivers unmatched protection with 900% elongation, preventing leaks and water damage more effectively than traditional sealants
- COMPLETE BASEMENT WATERPROOFING SYSTEM: Surpassing basic concrete paint, concrete sealers, and standard waterproof agents, this waterproofing membrane is designed to seal and protect against active leaks and moisture, making it perfect for basement leak and foundation repair. Seamlessly compatible with self leveling concrete applications
- VERSATILE CONCRETE CRACK FILLER: The professional-grade rubber coating and rubber waterproofing technology maintains flexibility in all temperatures, preventing future cracks and damage. This liquid rubber waterproof sealant provides superior adhesion to concrete, masonry, wood, metal, and foundation surfaces, making it an ideal choice for your DIY projects
- MAXIMUM COVERAGE & PERFORMANCE: This high-build basement sealer goes on like waterproof paint - Interior basement surfaces: 50 sq ft/gallon (requires: 2-3 coats), Exterior concrete sealer outdoor surfaces: 20 sq ft/gallon (requires: 3-4 coats). Apply between 50°F-90°F. For complete protection, use the rubber sealant with Liquid Rubber Geo-Textile on joints and transitions
- IMPORTANT USAGE GUIDELINES: The water-based foundation sealer formula contains zero VOCs for safe indoor application. No mixing required! Apply by brush, roller, or professional sprayer as part of your basement waterproofing system. Not suitable for walking surfaces due to tackiness when cured
- FOR A WATERTIGHT SYSTEM - Use rubber sealant with Liquid Rubber Geo-Textile on joints and transitions, fill small cracks with Liquid Rubber Sealant & Adhesive, and bridge joints, seams, vents, and protrusions where movement may occur. Scroll down for full application steps

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071X7TYYM |
| Best Sellers Rank | #9,378 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #33 in Hardware Sealers |
| Brand Name | Liquid Rubber |
| Color | Black |
| Compatible Material | Cement, Concrete, Engineered Wood, Masonry, Wood |
| Customer Reviews | 4.5 4.5 out of 5 stars (3,358) |
| Included Components | 5 Gallon |
| Item Dimensions | 12 x 12 x 16 inches |
| Item Form | Liquid |
| Item Weight | 19.8 Kilograms |
| Manufacturer | Liquid Rubber USA |
| Material Type | Polymer |
| Model | 20602 |
| Number of Items | 1 |
| Part Number | 20602 |
| Style Name | Protective |
| Surface Recommendation | Poured concrete, Concrete masonry units (CMUs), Insulated concrete forms (ICF), Pre-cast and permanent wood foundations (PWFs), Wood (with proper priming and preparation) |
| UPC | 628421206025 |
| Unit Count | 640 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** Liquid Rubber
- **Item Weight:** 19.8 Kilograms
- **Item dimensions L x W x H:** 12 x 12 x 16 inches
- **Material:** Polymer
- **Style:** Protective

## Images

![Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 5 Gal - Image 1](https://m.media-amazon.com/images/I/717T5qOvVeL.jpg)

## Available Options

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

## Questions & Answers

**Q: will this work on a pond?**
A: Yes, as a matter of fact I just redid my riverbed and the pond with concrete and then applied a couple of good coats of the liquid rubber using the last coat to adhere the rocks and it is beautiful and is holding the water perfectly'

**Q: What's the lowest temperature to apply this product ?**
A: I don't think the temp affects the function of this product as it does not have a " Do not allow to freeze " requirement. It doesn't really dry as it remains pliable like rubber. I would however heed the suppliers advice and try not to apply it below 5c/40f if possible.

**Q: Approximately how many square feet will one 5 gallon bucket cover?**
A: 100-125sq ft at a 60mil thickness. 
 Bought 5, 5gal buckets to do 580sq ft of foundation and had about 1/2 gallon left over at an average of 60mil thickness.

**Q: Question for anyone who sealed their basement from the inside. Has it held up against water leaks?**
A: Yes so far... make sure you get every nook and cranny! I missed a tiny little hole and it leaked.

## Frequently Bought Together

- Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - Black, 5 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/45157256-liquid-rubber-foundation-sealant-basement-waterproof-sealer-black-5-gal](https://www.desertcart.jp/products/45157256-liquid-rubber-foundation-sealant-basement-waterproof-sealer-black-5-gal)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-30*