The safe, easy way to maintain beautiful tile areas by covering up stubborn stained grout! Much easier to use than traditional grout colorants, Miracle Grout Pen Markers dry rapidly and leave a clean, uniform grout line without harsh chemicals and is completely odorless - no fumes! Special Features: Covers Grout Stains Easy-to-Use Non-Slip Comfort Grip Reversible Nib Odorless Non-Toxic