This is a bentonite-based sealing material designed for use in freshwater settings. It provides uniform delivery of powdered sodium bentonite directly through a water column, in saturated settings (e.g. below groundwater table), or where mechanical compaction is difficult or not possible. It will provide a low-permeability (hydraulic conductivity of 5×10-8 cm/sec) seal when hydrated. Resembling small stones, a major benefit of AquaBlok 2080FW is ease and speed of handling and installation.