Where to buy bentonite clay for ponds?

To answer the question “Where to buy bentonite clay for ponds?” we must first understand the amount of bentonite required for a pond. Why? Well, because approximating this amount will also give you a better idea of how to choose the best suppliers to buy bentonite clay for ponds.

Where to buy bentonite clay for ponds?

Understanding the amount of bentonite required for a pond

Let me take, as an example, a 20 ft x 20 ft farm pond with a maximum depth of 6 ft. Using our Bentonite Calculator we obtain a Pond Area of 1,024 sqft.
Now, depending on the type of soil of your pond, you can require anywhere from 2 lb/sqft to 5 lbs/sqft.


(Based on a maximum depth and considering water pressure of 7.5 feet’s)

Type Of Soil Bentonite required
Rock or Gravel 5 lbs per sqft
Sand Soil 4 lbs per sqft
Silt Soil 3 lbs per sqft
Clay Soil 2 lbs per sqft

*Reference values only: Please keep in mind these are average values and your particular needs may differ from the ones in these table*

Why is it important to know this before you find

where to buy bentonite clay for ponds?

So, best-case scenario, you will need 2,000 lbs of bentonite. Worst case scenario, you will need 10,000 lbs of bentonite. And that’s only for a 20ft by 20ft, with a 6 ft depth. (Not really huge, tbh).

As you can see, even for “not so big” ponds, you will require several thousand pounds of bentonite. Before you panic, let me tell you bentonite is an inexpensive product. So, when buying bentonite as pond sealant, you need to be looking for bulk bentonite suppliers or, in other words, a bentonite wholesaler.

Buy from someone that can offer you considerable amounts at a very competitive price. A bentonite wholesaler will be able to provide you better pricing because of the volume of material you will be purchasing and in many cases, can also take care of transportation and delivery for you.

3000 lbs super sack load

What should I look for in a bulk bentonite supplier?

When looking for a bulk bentonite clay supplier, try to find a wholesaler with various packing presentations. Analyze each packing option carefully, as the pricing may be affected by the presentation. Usually, super sacks have the lowest cost, but you will need to make sure you can handle them properly when they arrive at your property, to avoid logistical complications. Bags may be easier to handle by hand if you don’t have any equipment, but they can also be more expensive due to the packing cost.

Look for a bentonite wholesaler that delivers nationwide. Although delivery isn’t usually an issue in the twenty-first century, make sure they are very clear about the packing, delivery process, and reception process on your end. They share the expertise with you on how to apply the bentonite pond sealer. You don’t want a wholesaler to deliver the bentonite to your address and then leave you to research how to apply it. In my experience, 90% of the success of using bentonite as a pond sealer is knowing how to apply it to your particular pond situation effectively. You want a bulk bentonite supplier that can walk you through each step of the way and that can answer any questions you may have during the process, especially if you choose to do it yourself.

Bentonite clay for ponds

Bulk bentonite supplier packing sizes available

Bulk bentonite pond sealer is usually available from wholesalers in the following packaging sizes:

50 lbs

Plastic Bucket

Sodium Bentonite 5 gallon bucket

5-gallon buckets, filled with 50 lbs of bentonite per bucket. A pallet holds 30 buckets, and a truckload contains 18 pallets, which equals 27,000 lbs of bentonite.

50 lbs

Paper Bag

50 lbs and 100 lbs Bentonite Powder

Brown paper bag holding 50 lbs of bentonite. A pallet has 50 bags, and a whole truckload contains 18 pallets, which equals 900 bags or 45,000 lbs of bentonite.

100 lbs

Paper Bag

Where to buy bentonite clay for ponds?

Brown paper bag holding 100 lbs of bentonite. A pallet holds 25 bags, and a full truckload contains 18 pallets, which equals 450 bags or 45,000 lbs of bentonite.

3000 lbs

Super Sack

Where to buy bentonite clay for ponds?

The super sacks usually come with straps to be able to lift them and with a discharge valve at the bottom that quickly unties, to pour the bentonite into the desired area.

Most bentonite wholesale suppliers will allow you to order a partial truckload (less-than-truckload) as well as by full truckload.



To order a partial truckload, consider each pallet holds 2,500 lbs of product, and a super sack holds 3,000 lbs, make sure you order in multiples of those.

Full Truckload

3000 lbs super sack load

Each full truckload holds 45,000 lbs of bulk bentonite in any presentation, except for the 50 lbs bucket, which has only 27,000 lbs. Mostly resellers require this presentation (the 50 lbs bucket).

Why trust Lonestar Minerals to be your bulk bentonite supplier?

With Lonestar Minerals you can expect competitive pricing, extensive expertise, great quality product and turnkey service.

Lonestar Minerals is a company with over 50 years of history and experience. Over time, we have increased our expertise and, using our knowledge from many years in the field, we have developed our special mix of grain sizes (we call it the mix-mesh) to be more efficient than a single grain size bentonite pond liner.

We have the expertise of applying bentonite to seal your pond and, more importantly, we are willing to share it with you. Whether you want to do it yourself or trust us to do it for you, we are always willing to walk you through the process and answer any questions you may have.


We are passionate about our business and this Passion translates into our whole process, from the acquisition of our bentonite to research, delivery and application of the bentonite out in the field.


We are driven by a desire to achieve Excellence. Each batch of bentonite that we process at our plant to ensure its quality. Our production process is ISO-9001 certified.


We conduct ourselves with Integrity, providing truthful consultation services and operating under laws, legislation and policies.


We focus on the People, rather than the things. Our main goal is to aid our customer’s success and to know our staff is proud to be working with us.