Pondseal Aquablok Pondsealer 50 lb.

Is composed of the highest quality Wyoming sodium bentonite - coated over a limestone aggregate core - PondSeal provides precision placement and targeted delivery for reliable swell and an extremely low-permeable seal. Effective both during and after construction - even through standing water. No dusting, dissipation, or product loss (literally sinks "like a stone"). Incredibly durable; structurally stable; all-natural (won't harm fish). Blanket over porous soils or other suspected problem areas at 5-10 lbs per sq ft.