Gel Type Polyacrylic Weak Acid Cation exchanger (WAC). The functional carboxylic groups give high chemical efficiency in many applications, especially for the removal of bicarbonate alkalinity in water treatment and for treating aqueous organic solutions.

The major use  of WAC is in the dealkalization and softening of waters to resuce the ionic load on the subsequent strong acid resin bed. Weak Acid Cation resins are increasingly being used in special applications including treatment of waste water streams in order to reduce environmental pollution