---
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: "฿19625"
currency: THB
in_stock: true
reviews_count: 8
category: "Natural Waterscapes"
url: https://www.desertcart.co.th/products/59461418-granular-sodium-bentonite-clay-for-pond-sealing-natural-soil-clay
store_origin: TH
region: Thailand
---

# 100% natural, eco-friendly clay Expands 15X on water contact Swell index > 30 for superior sealing 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:** ฿19625
**Availability:** ✅ In Stock

## Summary

> 💧 Seal your pond leaks like a pro—because your water garden deserves the best!

## 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?** ฿19625 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/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 seamless, flexible seal that lasts season after season.
- • **Pro-Grade Swell Power:** Boasts a swell index greater than 30, ensuring rapid and reliable pond leak repair.
- • **Ultimate Leak Defense:** Expands up to 15 times its size to create an impenetrable waterproof barrier.
- • **Versatile Natural Sealant:** Perfect for ponds, lakes, dams, livestock tanks, and pipe collars—nature’s own waterproofing solution.
- • **Eco-Conscious Waterproofing:** All-natural Wyoming sodium bentonite clay that protects your water features without harmful chemicals.

## Overview

Natural Waterscapes Granular Sodium Bentonite Clay is a 25-pound blend of chips and powder designed to expand up to 15 times when wet, creating a powerful, natural seal for ponds, dams, and water features. With a swell index over 30, it effectively stops leaks by integrating into soil and forming a flexible, waterproof barrier. Ideal for professional-grade pond leak repair and eco-friendly waterproofing.

## 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.

Review: pond leak repair - worked well to fix a pond leak
Review: Need several bags for any results - Decent sealant for my pond leak. Granular sodium bentonite helped slow the pond leak, but required more quantity than expected. Works better for smaller leaks, I think. Still, a helpful natural solution. 3 stars

## 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 | #101,008 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #58 in Water Garden & Pond Liners & Seals |
| Brand Name | Natural Waterscapes |
| Customer Reviews | 4.4 4.4 out of 5 stars (137) |
| Date First Available | November 20, 2017 |
| Date First Available  | November 20, 2017 |
| Directions | 1. Drain the pond. 2. Incorporate bentonite into the soil of the pond bottom and sides. 3. Mix the soil and bentonite and then compact it. 4. Cover the bentonite with clean soil or sand when using continuous blanket application. |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 12 x 12 x 11 inches |
| Item Package Dimensions L x W x H | 18 x 11.5 x 5.25 inches |
| Item Weight | 25 Pounds |
| Item model number | 200025 |
| Item model number  | 200025 |
| Manufacturer | Natural Waterscapes |
| Manufacturer  | Natural Waterscapes |
| Material | clay |
| Product Dimensions  | 12 x 12 x 11 inches; 25 Pounds |
| Size | 25 pounds |
| Target Audience Keyword | adults |

## Product Details

- **Brand:** Natural Waterscapes
- **Item Form:** Granules, Powder
- **Item Weight:** 25 Pounds
- **Liquid Volume:** 25 Liters
- **Manufacturer:** Natural Waterscapes

## 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)

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ pond leak repair
*by A***R on October 20, 2025*

worked well to fix a pond leak

### ⭐⭐⭐⭐⭐ Need several bags for any results
*by K***. on August 24, 2024*

Decent sealant for my pond leak. Granular sodium bentonite helped slow the pond leak, but required more quantity than expected. Works better for smaller leaks, I think. Still, a helpful natural solution. 3 stars

### ⭐⭐⭐⭐ Buy extra
*by Y***S on November 3, 2025*

Takes a little time to work.

## Frequently Bought Together

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-02-23*