Granular Sodium Bentonite Clay for Pond Sealing - Natural Soil Clay Pond Liner 25 Pounds - Blend of Chips and Powder - Use for Pond Leak Repair & Dam Sealer

Bentonite chips and powder blend expands in contact with water to seal pond soils Granular Wyoming Sodium Bentonite for pond leak repair has a swell index greater than 30 to stop pond leaks. All-natural pond sealant for use in large ponds, lakes, waterfall edges, farm ponds, livestock tanks, pipe sealing, and other waterproofing applications that require a natural flexible seal. Expands when in contact with water to seal soil - Use to create a waterproof collar around outlet pipes and other penetrations Bentonite clay pond sealer should be mixed with pond soil and compacted to create the tightest soil seal