PondSeal is an all natural product that can be used as a water containment membrane (compacted or pure layer) in stock ponds, sewer lagoons, landfills, irrigation canals and cut-off walls, decorative garden ponds, etc. PondSeal’s bentonite clay sealant can expand 15 times or more when exposed to moisture making it an ideal choice for sealing ponds. The general application rate for bentonite varies from 2 to 6 lbs per square foot of area.
Unaltered high-swelling sodium bentonite.