Sodium Bentonite Clay for Pond Sealing 3000 lb Super Sack
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.