--- product_id: 59865111 title: "Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 1 Gal" brand: "liquid rubber" price: "R3007" currency: ZAR in_stock: true reviews_count: 13 category: "Liquid Rubber" url: https://www.desertcart.co.za/products/59865111-liquid-rubber-foundation-sealant-basement-waterproof-sealer-black-1-gal store_origin: ZA region: South Africa --- # 50 sq ft/gallon interior coverage 900% elongation for ultimate flexibility Permanent waterproof membrane Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 1 Gal **Brand:** liquid rubber **Price:** R3007 **Availability:** βœ… In Stock ## Summary > πŸ› οΈ Seal the deal with Liquid Rubber β€” waterproof your foundation like a pro! ## Quick Answers - **What is this?** Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 1 Gal by liquid rubber - **How much does it cost?** R3007 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/59865111-liquid-rubber-foundation-sealant-basement-waterproof-sealer-black-1-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 - β€’ **Safe & Easy Application:** Water-based, zero VOC formula applies smoothly with brush, roller, or sprayerβ€”no mixing required. - β€’ **High Coverage Efficiency:** Covers up to 50 sq ft per gallon indoors with just 2-3 coats, maximizing your investment. - β€’ **Versatile Surface Compatibility:** Bonds flawlessly to concrete, masonry, wood, and metal for all your repair and waterproofing needs. - β€’ **Professional-Grade Waterproofing:** Creates a durable, seamless membrane that outperforms traditional sealants for basement and foundation protection. - β€’ **Unmatched Flexibility & Strength:** Stretches up to 9x its size to seal cracks and prevent leaks under pressure. ## Overview Liquid Rubber Foundation Sealant is a professional-grade, flexible elastomeric coating designed to create a permanent waterproof membrane for basements and foundations. With 900% elongation, it prevents leaks and water damage by sealing cracks and active leaks on multiple surfaces including concrete, masonry, wood, and metal. Offering up to 50 sq ft coverage per gallon indoors, this water-based, zero VOC formula is easy to apply and ideal for DIY or professional use, ensuring long-lasting protection against moisture and structural damage. ## Description Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 1 Gal | Flexible Elastomeric Coating - Crack Filler, Leak Repair, Basement Waterproofing Solution, Indoor/Outdoor Use, DIY Protection - desertcart.com Review: Works great - I live in a 100 year old house and had experienced flooding in a ground level room. Apparently this had been going on for some time but previous owners didn't mention it. After getting quotes of up to $12k to excavate and repair the foundation (below grade) I decided to give it a try. After researching the internet I found this sealant and purchased the 5 gallon size. Next step was to excavate 25 ft long, about 18 inches deep, around where I thought the leak was occurring. I found several cracks and deteriorated concrete that I patched. Last step was to apply 4 coats of the foundation sealant using a concrete brush. Instructions say you can roll it on but it just seemed too thick so I went with the brush. My coats were probably thinner than what the instructions recommended but it looked really thick when I was applying it. Each coat dried in about 24 hours. You can tell when it's cured by the color change and it being dry to the touch. After the 4 coats, I back-filled the trench and waited for the rain. It's been 4 months and we've had several heavy rains with no leaks. So I'm calling it a success at this time. I ended up spending about $250 in materials so I'm glad I didn't contract this out. Maybe 30 man-hours to trench, patch, coat, and back-fill. I'm in my 60's so others may be quicker. Some noteworthy comments: I only used a couple of gallons when I had estimated I needed almost 4. Maybe my coats were thinner than they should be but appears to have been effective regardless; I used concrete brushes at about $10 a brush. I tried to clean the first one but this stuff is like a thick tar and wasn't worth the effort. I hate to put unnecessary stuff in the landfill but cleaning was just too difficult. I've got another area I may address similarly so I'm hoping the sealant will last a while after opening. Will probably be Fall project. Overall, a very good product, easy to apply and work with, and appears to have addressed my leak issues. Review: Impressive - A superior product. Goes on easily and drys fast. It cures into a rubber-tar based coat. I advise 2 coats. On corners, use the gause for added strength. This product was like painting Bitumen on the walls. Underground, this will last a hundred years and there's no way water will pass through a properly prepped wall! Color is black and fills voids, although a parge and repair should be used first then some gauze if theres a structural repare thats called for. When I purchased this, it was quite expensive. The price has come down since my purchase thus making it a better deal. Btw, thise using Blackjack, blackjack isn't in the same league! Wish I took some pics or did a video, just take my word on it as this was far from my first rodeo. ## 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 50Β°F-90Β°F. For complete protection, use the rubber sealant with Liquid Rubber Geo-Textile on joints and transitions - IMPORTANT USAGE GUIDELINES: Product goes on BROWN but dries Black; 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 | B071X7VL68 | | Best Sellers Rank | #9,687 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #39 in Hardware Sealers | | Brand | Liquid Rubber | | Brand Name | Liquid Rubber | | Color | Black | | Compatible Material | Cement, Concrete, Engineered Wood, Masonry, Wood | | Customer Reviews | 4.6 out of 5 stars 3,375 Reviews | | Included Components | 1 Gallon | | Item Dimensions | 8 x 8 x 8 inches | | Item Form | Liquid | | Item Weight | 9 pounds | | Item dimensions L x W x H | 8 x 8 x 8 inches | | Manufacturer | Liquid Rubber USA | | Material | Liquid-Based Rubber Elastomeric membrane | | Material Type | Liquid-Based Rubber Elastomeric membrane | | Model | 13 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | 10602 | | Style | Protective | | Style Name | Protective | | Supported Standards | ASTM C-920 | | 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 | 628421106028 | | 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:** 8 x 8 x 8 inches - **Material:** Liquid-Based Rubber Elastomeric membrane - **Style:** Protective ## Images ![Liquid Rubber Foundation Sealant - Basement Waterproof Sealer, Black, 1 Gal - Image 1](https://m.media-amazon.com/images/I/71Y0KORR55L.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: can i use in wood? i want to do wooden pots** A: Yes, you can use the Liquid Rubber Foundation Sealant in wooden pots or planters. Please see the Liquid Rubber USA site for more specific application info. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great *by R***A on June 6, 2025* I live in a 100 year old house and had experienced flooding in a ground level room. Apparently this had been going on for some time but previous owners didn't mention it. After getting quotes of up to $12k to excavate and repair the foundation (below grade) I decided to give it a try. After researching the internet I found this sealant and purchased the 5 gallon size. Next step was to excavate 25 ft long, about 18 inches deep, around where I thought the leak was occurring. I found several cracks and deteriorated concrete that I patched. Last step was to apply 4 coats of the foundation sealant using a concrete brush. Instructions say you can roll it on but it just seemed too thick so I went with the brush. My coats were probably thinner than what the instructions recommended but it looked really thick when I was applying it. Each coat dried in about 24 hours. You can tell when it's cured by the color change and it being dry to the touch. After the 4 coats, I back-filled the trench and waited for the rain. It's been 4 months and we've had several heavy rains with no leaks. So I'm calling it a success at this time. I ended up spending about $250 in materials so I'm glad I didn't contract this out. Maybe 30 man-hours to trench, patch, coat, and back-fill. I'm in my 60's so others may be quicker. Some noteworthy comments: I only used a couple of gallons when I had estimated I needed almost 4. Maybe my coats were thinner than they should be but appears to have been effective regardless; I used concrete brushes at about $10 a brush. I tried to clean the first one but this stuff is like a thick tar and wasn't worth the effort. I hate to put unnecessary stuff in the landfill but cleaning was just too difficult. I've got another area I may address similarly so I'm hoping the sealant will last a while after opening. Will probably be Fall project. Overall, a very good product, easy to apply and work with, and appears to have addressed my leak issues. ### ⭐⭐⭐⭐⭐ Impressive *by T***Y on November 27, 2025* A superior product. Goes on easily and drys fast. It cures into a rubber-tar based coat. I advise 2 coats. On corners, use the gause for added strength. This product was like painting Bitumen on the walls. Underground, this will last a hundred years and there's no way water will pass through a properly prepped wall! Color is black and fills voids, although a parge and repair should be used first then some gauze if theres a structural repare thats called for. When I purchased this, it was quite expensive. The price has come down since my purchase thus making it a better deal. Btw, thise using Blackjack, blackjack isn't in the same league! Wish I took some pics or did a video, just take my word on it as this was far from my first rodeo. ### ⭐⭐⭐⭐ Works well but, high sheen. *by J***. on December 31, 2025* Really nice sealant just wish it did not have such a high shine. If you prep the surface well, it goes on easily and seems to have very high adhesion. Worked quite well and now I will just need to wait and see how it holds up. ## Frequently Bought Together - Liquid Rubber Basement and Foundation Repair Sealant - Waterproof Concrete Sealer & Crack Filler - Flexible Coating for Indoor & Outdoor Use - Waterproofing Paint - 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, 1 Pack --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/59865111-liquid-rubber-foundation-sealant-basement-waterproof-sealer-black-1-gal](https://www.desertcart.co.za/products/59865111-liquid-rubber-foundation-sealant-basement-waterproof-sealer-black-1-gal) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-08-14*