- Safe on colored grout
- Cleans with little or no scrubbing
- Bleach-free professional strength formula
ZEP Commercial 32 oz. Grout Cleaner and Whitener is formulated for use only on floor grout lines. It cleans and whitens grout and removes light rust stains off concrete with little or no scrubbing. It is not recommended for marble, stone, metal, or Corian.
