Natural way to seal leaking ponds, dikes, dams, spillways, etc. Sodium bentonite clay will create a waterproof seal. Apply at the rate of 2-5 lbs. per Square foot. Pondseal

Natural way to seal leaking ponds, dikes, dams, spillways, etc. Sodium bentonite.

Seals leaks without draining the pond
Clay particles swell when wet, creating a solid layer of leak protection
Great for sealing around intake pipes, muskrat holes, cuts and tears in liners
Eco-friendly - all earthen ingredients, will not alter water chemistry
Apply at two to five pounds per square foot for a 3/4" thick coverage or ten pounds per square foot for 1 1/2" thick coverage

Sealing a pond with bentonite clay is the most effective way for making a pond able to retain water. You can fix the leaking pond with bentonite in many ways like the sprinkle method, blanket method and mix blanket method. The simplest of all is the sprinkle method.

You just have to sprinkle this bentonite clay in the leaking area by hand or by using broadcast spreader. For this method you have to use granular bentonite. You have to use 5 pounds of this bentonite clay for each square foot. Don’t forget to wear a face/dust mask while doing this.

Instructions

The amount of bentonite clay that is required to seal a pond depends upon the porosity of pond soil. Porosity is more when high seepage of water occurs.
Bentonite is a natural substance. It is non toxic to fish.
First remove all the debris from the pond while you add the bentonite clay in the pond. Using the blanket method:

Do not leave any blank space.
If you don’t want to disturb the bentonite layer then add the water carefully.
You have to maintain a good depth of soil layer.
Don’t perform this method if the weather is too hot.

Bentonite application rates

Soil type

Fair clay : 2 lbs of bentonite per square foot
Poor clay : 3 lbs of bentonite per square foot
Silty Loam : 3-4 lbs of bentonite per square foot
Sandy Loam : 4-5 lbs of bentonite per square foot
Sand : 6 lbs of bentonite per square foot
Sand and gravel : 6-8 lbs of bentonite per square foot
Gravel and fractured bedrock 8-10 lbs of bentonite per square foot

https://smithcreekfishfarm.com/products/bentonite-pond-seal-50-pound-bag

Bentonite Pond Seal 50 Pound Bag

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