Leaking pond?
Pond Sealer holds water naturally.


Pond Sealer solves water retention problems in both new and existing ponds, even in sandy or rocky soil.

Many ponds composed of a variety of soil types are prone to water loss by seepage. This water loss can be controlled by the application of Pond Sealer. Pond Sealer Sodium Bentonite Pond Sealant makes an excellent liner for new pond construction and sealing existing ponds with leaks or seepages. Pond Sealer is also used for spot treating specific problem areas. It is an economical and environmentally safe way to accomplish pond and lake sealing to reduce seepage losses. 

What is sodium bentonite and how does it work?

Pond Sealer is a high swelling, chemically unaltered, sodium bentonite pond sealant that contains no additives. Sodium bentonite is a naturally occurring clay that absorbs water and expands many times its dry size to form a watertight membrane or barrier on the pond bottom. This barrier provides a reduction or elimination of water loss due to seepage. Watch the video, see how effective it is!

Sodium Bentonite is a safe natural mineral.

Pond Sealer Pond Sealant is a natural mineral and can be used for sealing recreational ponds, farm ponds, stock tanks, retention ponds and wastewater treatment lagoons. When properly applied, Pond Sealer sodium bentonite pond sealant will not affect the water or wildlife. It is EPA approved and is NSF Certified to Standard 60 for use in drinking water applications.

Learn about your pond soil’s porosity in a Soil Test you can perform at home. 

How fast will Pond Sealer seal your
pond? Watch this Soil Test video and see for yourself.

How do you apply Pond Sealer to your pond?

There are 3 different methods for applying Pond Sealer.
1. The Blanket Method
2. The Mixed Method
3. and the Sprinkle Method.

The method you will use is dependent on several factors. Your situation may be a case of construction of a new pond or sealing an existing pond that’s leaking.

If it’s an existing pond, how much you know about the location of the leak will be a determining factor. There will most likely be preparation work that will need to be done. This is covered in depth in the Application Methods page.