--- product_id: 14871374 title: "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: "¥49774" currency: JPY in_stock: true reviews_count: 13 category: "Liquid Rubber" url: https://www.desertcart.jp/products/14871374-waterproof-sealant-roof-and-gutter-coating-black-1-gallon-diy store_origin: JP region: Japan --- # UV & temperature resistant for harsh climates 950% elongation for ultimate flexibility Covers up to 30 sq ft per gallon on vertical surfaces 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:** ¥49774 **Availability:** ✅ In Stock ## Summary > 💪 Seal the deal with Liquid Rubber — where durability meets flexibility! ## Quick Answers - **What is this?** 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?** ¥49774 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-waterproof-sealant-roof-and-gutter-coating-black-1-gallon-diy) ## 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 - • **Trusted by Pros & DIYers:** Millions of gallons sold, delivering reliable leak protection for every project scale. - • **Professional-Grade Coverage:** Effortlessly brush, roll, or spray on for precise application on roofs, gutters, and foundations. - • **Industrial-Grade Waterproofing:** Creates a seamless, durable barrier that outperforms traditional roof tar and patch products. - • **Eco-Friendly & Odorless Formula:** Water-based, VOC-free sealant safe for indoor/outdoor use and sensitive materials. - • **Extreme Flexibility & Durability:** Withstands building movement and temperature swings without cracking or peeling. ## Overview Liquid Rubber Waterproof Sealant is a premium, water-based elastomeric coating designed for flat and low-slope roofs, gutters, and concrete surfaces. Featuring 950% elongation and superior adhesion, it forms a flexible, UV-resistant membrane that withstands extreme weather and building movement. Easy to apply by brush, roll, or spray, this industrial-strength sealant offers professional-grade coverage without harmful VOCs, making it the go-to choice for contractors and DIYers seeking long-lasting waterproof protection. ## 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: Amazing product that actually works!! - We have tried nearly every type of roof caulking out there. The Texas summers on a metal roof are brutal. This and the paint are the only thing that have held up. They flex and still seal where 2 pieces of metal contact where we have had a roof leak for years... no more leak. It set solid in 48 hours. Application was really easy and forgiving. We put on 3 layers of the paint on the tape just to be safe which surprisingly didn't take very much to do. No running or bubbling found. Even after 120 degree Texas days making the roof well over 150... and it still held. No cracking, running.. nothing. It is our go to now. Well worth the money and the only roof sealant that still seems to work. Mineral oil to clean the brush, easy to apply - just like a thick paint. Dries in 24-48 hours. 3 layers with the tape was enough to handle 7 inches of rain in 3 hours no leaks this spring. Thank you for making this and please keep selling it! Review: Liquid rubber - Works as advertised. I will buy it again. ## 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 | #6,141 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #18 in Hardware Sealers | | Brand | Liquid Rubber | | Brand Name | Liquid Rubber | | Color | Original Black | | Compatible Material | Multiple | | Customer Reviews | 4.4 out of 5 stars 2,204 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 ![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 ### ⭐⭐⭐⭐⭐ Amazing product that actually works!! *by S***N on August 23, 2024* We have tried nearly every type of roof caulking out there. The Texas summers on a metal roof are brutal. This and the paint are the only thing that have held up. They flex and still seal where 2 pieces of metal contact where we have had a roof leak for years... no more leak. It set solid in 48 hours. Application was really easy and forgiving. We put on 3 layers of the paint on the tape just to be safe which surprisingly didn't take very much to do. No running or bubbling found. Even after 120 degree Texas days making the roof well over 150... and it still held. No cracking, running.. nothing. It is our go to now. Well worth the money and the only roof sealant that still seems to work. Mineral oil to clean the brush, easy to apply - just like a thick paint. Dries in 24-48 hours. 3 layers with the tape was enough to handle 7 inches of rain in 3 hours no leaks this spring. Thank you for making this and please keep selling it! ### ⭐⭐⭐⭐⭐ Liquid rubber *by M***R on August 13, 2026* Works as advertised. I will buy it again. ### ⭐⭐⭐⭐ Would purchase again *by L***A on February 12, 2026* My project that I used this on is over three years old. There is slight cracking under full sun but otherwise it has held up well. It deals with constant watering and has adhered well to my project. It wasnt hard to apply with a big brush but it does start to harden quickly. I still have some leftover because it spread so easily as is. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/14871374-waterproof-sealant-roof-and-gutter-coating-black-1-gallon-diy](https://www.desertcart.jp/products/14871374-waterproof-sealant-roof-and-gutter-coating-black-1-gallon-diy) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-20*