Powers out tough stains! Makes floors look like new! Quickly cleans and brightens grout lines on floors. Safe on colored grout. Zep Commercial Grout Cleaner and Whitener quickly restores stained grout, lines on floors without the need for heavy scrubbing. No phosphates. www.zepcommercial.com Questions? 1-888-805-HELP. www.zepcommercial.com. Made in USA.