Since 1882. Cleans. Shines. Protects. Bar Keepers Friend Granite & Stone Cleaner & Polish is designed and formulated to enhance and protect the natural beauty of your sealed stone and other solid surfaces. Use on granite, quartz, marble, Corian, travertine, terrazzo, limestone, slate and other natural stone, non-porous surfaces. Safely removes grease, grime, water marks and stains for a streak-free shine. The pH balanced formula highlights natural colors and beautifies your stone surfaces.