Printed from: https://conservationhandbooks.com/waterways-wetlands/artificial-linings/bentonite/
Bentonite is a very fine powder of clay particles which swells in contact with water to become a waterproof clay. Two basic types are available, either sodium bentonite or calcium bentonite. Sodium bentonite is imported from the USAand is the higher quality but more expensive material, absorbing five times more water, weight for weight, than...