How much bentonite to seal a pond? | Free calculation here
To give you an idea, each full truckload of bentonite contains 45,000 lbs in 15 super sacks of 3,000 lbs each. So you'll need at least one and a half truckloads of bentonite to be able to create an effective pond liner for your pond. The more porous the soil, the more bentonite you require for a good seal.