Lustro Italiano Stone Sealer is an 8-1/2-ounce ultra premium grade natural stone sealer designed to deeply penetrate into the micropores of stone: granite, marble, travertine, limestone, etc. Lustro Italiano sealer also works excellent on quartz stone and concrete. May also be used as a premium grade grout sealer. Lustro Italiano Sealer does not change the color of the stone, does not leave a film and provides up to 5 years of protection. 8-1/2-ounce size is perfect for the average size kitchen! WARNING: Lustro Italiano Ultra Premium Grade Sealer does not provide anti-etch protection on marble surfaces. Use of acidic substances such as wine, tomatoes, citrus, coffee, etc. will etch the surface by creating a chemical reaction with eh calcium carbonate present in marbles. For etching problems use Lustro Italiano Etch Remover.