Grout-Aide 8 oz Kit is the best product for those projects to refresh and renew stains on grout. The 8 oz. kit includes two size applicator tips, a fiber tip for hard to reach areas and a roller applicator to give you those perfect straight lines. Use indoors or outdoors on multiple surfaces like granite, marble, glass, stone, wood, slate and synthetic tile. Available in designer colors to change grout and give a fresh look.