Protects concrete (including GFRC) from the damaging effects of acid rain, deicer scaling, freeze-thaw cycles, and freeze-thaw related damage. Keeps concrete clean by reducing the amount of dirt and other pollutants that may absorb into the substrate. Prevents corrosion on reinforcing steel from water, deicing salts, and other waterborne chemicals. Provides resistance against water, alkalis, acid rain, UV and staining.