SlipDoctors™ Stone-Grip works at the micro-pore level to improve traction, especially on wet surfaces. When properly applied, Stone-Grip will raise the slip coefficient to equal or exceed the Americans with Disabilities Act/U.S. Occupational Safety and Health Administration (ADA/OSHA) recommended guidelines — even when wet. Stone-Grip is not intended for use on synthetic tiles. One gallon of Stone-Grip will treat up to 500 square feet.