Zep Commercial 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.

　　- Each case contains 12 bottles

　　- Use only for cleaning and whitening floor grout lines

　　- Bleach-free professional-strength formula cleans with little or no scrubbing

　　- Sassafras scent