Bentonite for ponds

Wildlife Pond Repair

Sometimes the places where the ponds have been built are less than ideal and require an experienced crew to repair them. That is the case with this wildlife pond. It has two peculiarities that make it a no easy task for beginners, the location and the soil.


This wildlife pond was built next to a hill, a good location for when you want the pond to fill with rainwater.


Still, this pond was losing water faster than the rain could fill in it .


To succeed in repairing this pond, we had to consider the slope and the soil.


When you build a pond next to a hill, you must excavate a gentle slope to reduce the risk of a landslide. Also, you need to consider that commonly, this soil contains a lot of rock.


In this project, the pond soil contains a mixture of rock, black clay, and red clay, the waterproofing material in this mixture wasn’t enough to hold water.


We initiate the repair by removing some old material to expose the soil layers. Then, we add sodium bentonite and mix them to get a more even soil, this time with enough sealing material (sodium bentonite) to create a very resistant pond seal.


The soil preparation is crucial for water retention, no matter which pond liner you use, you should try to get the most even soil possible.


After a couple of days of hard work, this wildlife pond is holding water even when the location and soil are not ideal.

Project Type

Pond Repair

Pond Location


Pond Size

Half acre

Pond Liner, Pond Repair