--- product_id: 59461418 title: "Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer" brand: "natural waterscapes" price: "1268.87 DT" currency: TND in_stock: true category: "Natural Waterscapes" url: https://www.desertcart.tn/products/59461418-granular-sodium-bentonite-clay-for-pond-sealing-natural-soil-clay store_origin: TN region: Tunisia --- # 100% natural, eco-friendly clay Expands 15X on water contact Swell index > 30 for leak-proof seal Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer **Brand:** natural waterscapes **Price:** 1268.87 DT **Availability:** ✅ In Stock ## Summary > 💧 Seal your pond like a pro — natural, powerful, and leak-proof! ## Quick Answers - **What is this?** Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer by natural waterscapes - **How much does it cost?** 1268.87 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/59461418-granular-sodium-bentonite-clay-for-pond-sealing-natural-soil-clay) ## Best For - natural waterscapes enthusiasts ## Why This Product - Trusted natural waterscapes brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Easy Soil Integration:** Blend with pond soil and compact for a tight, long-lasting seal that outperforms synthetic liners. - • **Pro-Grade Swell Index:** With a swell index over 30, it guarantees superior pond leak repair performance. - • **Eco-Conscious Pond Care:** All-natural Wyoming sodium bentonite ensures your water features stay sealed without harmful chemicals. - • **Ultimate Waterproof Seal:** Expands dramatically to create an impenetrable barrier against leaks. - • **Versatile Natural Solution:** Perfect for ponds, lakes, dams, livestock tanks, and pipe sealing with flexible, natural clay. ## Overview Natural Waterscapes Granular Sodium Bentonite Clay is a 25-pound blend of chips and powder that expands up to 15 times its size when wet, creating a highly effective, all-natural waterproof seal for ponds, dams, and water features. With a swell index greater than 30, it ensures superior leak repair by integrating seamlessly with soil, making it the trusted choice for eco-conscious professionals and pond enthusiasts alike. ## Description Bentonite clay is a natural expanding clay sealant that when exposed to moisture can expand 15X or more creating a very effective pond sealant when applied correctly. Bentonite Clay Application Rates for pond/lake bottoms To properly apply bentonite to seal a pond, the pond must be drained and the bentonite clay then incorporated into the soil of the pond bottom and sides. The application rate for bentonite ranges from 2 pounds to more than 5 pounds per square foot depending on the soil characteristics. For clayey and silty soils, 2 pounds per square foot MAY be sufficient. For sandy soils 4 pounds MAY be sufficient and for soil containing gravel and rock, in excess of 5 pounds will be required to obtain a seal. Once the bentonite is applied, the soil should be disk harrowed to mix the soil and bentonite and then compacted. Alternatively, a continuous blanket of bentonite can be applied to the soil and then carefully covered with clean soil or sand to prevent the clay from mobilizing into the water column. ## Features - Bentonite chips and powder blend expands in contact with water to seal pond soils - Granular Wyoming Sodium Bentonite for pond leak repair has a swell index greater than 30 to stop pond leaks. - All-natural pond sealant for use in large ponds, lakes, waterfall edges, farm ponds, livestock tanks, pipe sealing, and other waterproofing applications that require a natural flexible seal. - Expands when in contact with water to seal soil - Use to create a waterproof collar around outlet pipes and other penetrations - Bentonite clay pond sealer should be mixed with pond soil and compacted to create the tightest soil seal ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B077MMVPJM | | ASIN | B077MMVPJM | | Best Sellers Rank | #95,045 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #66 in Water Garden & Pond Liners & Seals | | Brand Name | Natural Waterscapes | | Customer Reviews | 4.3 4.3 out of 5 stars (145) | | Date First Available | November 20, 2017 | | Item Dimensions | 12 x 12 x 11 inches | | Item Form | Granules, Powder | | Item Weight | 25 pounds | | Item model number | 200025 | | Manufacturer | Natural Waterscapes | | Manufacturer | Natural Waterscapes | | Material Type | clay | | Model | 200025 | | Part Number | 200025 | | Product Dimensions | 12 x 12 x 11 inches; 25 pounds | | UPC | 860625000317 | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** Natural Waterscapes - **Item Weight:** 25 pounds - **Item dimensions L x W x H:** 12 x 12 x 11 inches - **Material:** clay - **Water Resistance Level:** Waterproof ## Images ![Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer - Image 1](https://m.media-amazon.com/images/I/71XU+fP4KzL.jpg) ![Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer - Image 2](https://m.media-amazon.com/images/I/81JOLAPpIjL.jpg) ![Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer - Image 3](https://m.media-amazon.com/images/I/71+9yD3KRAL.jpg) ![Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer - Image 4](https://m.media-amazon.com/images/I/91cjw3mxM8L.jpg) ![Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer - Image 5](https://m.media-amazon.com/images/I/81sAsuuDc-L.jpg) ## Questions & Answers **Q: I plan to make a slurry of the bentonite. Do these granules dissolve easily in water or does it stay in granular form?** A: Turns into a gooey soft clay **Q: I have a lined pond where the leak is at the bottom rocks also on the bottom. The pond has no water, will this work?** A: Sodium bentonite is meant to be mixed with the dry soil in the bottom and sides of the pond and compacted. We do not recommend using this on ponds with liners. **Q: I have a small man made concrete creek...flex seal and pool paint has not worked to deal it...will this work?** A: We wouldn't recommend sodium bentonite for this application. It is best used when you can mix it with soil and compact it. **Q: Can I use this product to seal the bottom of my concrete pond?** A: We would not recommend using this product for sealing concrete. Sodium Bentonite is designed for sealing earth bottom ponds. We recommend using a epoxy sealant like Pond Shield for a concrete pond. ## Frequently Bought Together - Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer - 50 Pound Benseal Bentonite Drilling Mud Water Well Pond Foundation Seal Waterproof Baroid Grouting Wyoming Sodium Bentonite - Natural Waterscapes Granular Sodium Bentonite Clay for Pond Sealing 45 lbs --- ## 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.tn/products/59461418-granular-sodium-bentonite-clay-for-pond-sealing-natural-soil-clay](https://www.desertcart.tn/products/59461418-granular-sodium-bentonite-clay-for-pond-sealing-natural-soil-clay) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-22*