Black Diamond Ultimate Grout Cleaner is quick and easy to use, The deep penetrating formula effectively cleans and lifts dirt out of grout and off the surface of your tile, This acid and bleach free product accomplishes this without damaging grout tile or thin set, Ultimate Grout Cleaner comes Ready-To-Use and is safe to clean both white or colored grout, Deep Penetrating Fast Action & Non-Abrasive Comes Ready to Use Acid Free- No Neutralization Needed Will Not Harm Grout or Thin set Quick & Easy to Use Safe for Both White and Colored Grout SKU: BKDS006