Sodium Bentonite, 50 lb bag at
Sodium bentonite is a natural sealant and is used for sealing stock and recreational ponds, dairy and sewage lagoons, and city landfills. It is also effective as a hole plug as well as for controlling dust on highways. Sodium bentonite is one of the quot;most effective low cost methodsquot; of treating porous soils. It is so effective, that the Federal Government and most states require a liner of sodium bentonite