Black Diamond Stoneworks GRANITE SEALER: Seals and Protects, Granite, Marble, Travertine, Limestone and Concrete Counter Tops. Works Great On Grout, Fireplaces and Patios.Black Diamond Stoneworks Granite Sealer is the finest quality oil and water repellent available. If you are looking for an impregnator sealer for your countertops that is easy to use with Professional results then you have found it! Using this granite protector will keep all your Granite Counters, natural stone, concrete, slate, brick, block, sandstone and grout looking new for years to come. Granite Sealer gives you the confidence your stone is