Sealing a pond with bentonite is the most effective method to make the pond retain water. Sodium Bentonite clay is used for this purpose. In this article, you will learn how to seal a pond with bentonite by three methods.

Bentonite, a naturally occurring clay, is renowned for its ability to seal ponds and lakes, effectively preventing water loss through seepage. Packed with absorbent properties, it expands upon contact with water, making it an ideal barrier against leaks.

HOW TO USE BENTONITE TO SEAL A POND. In order to create a good bentonite seal, bentonite must be “trapped” inside the soil of the bottom of the pond; effectively expanding within the bottom of the pond and preventing the leakage of water to the underground or the sides of the pond.

To seal a 1 acre pond, you need between 65 and 140 tons of bentonite. To give you an idea, each full truckload of bentonite contains 22.5 tons of bentonite, so you’ll need between 3 and 5 truckloads of bentonite to fully seal the pond.

How to use bentonite to seal an existing pond. Bentonite can also be used to seal a leaking pond. For an existing pond that leaks too much water to your liking, you have a choice between the already introduced mixing method and the blanket method, as well as a so-called sprinkle method.