Black Diamond"s Nex-Gen Sealer is the finest quality oil and water repellent available. Using this product will keep all your natural stone, granite, marble brick, block, slate or concrete looking new for years to come. From granite, marble, travertine or limestone, Nex-Gen Stone Sealer gives you the confidence your stone is protected. This product is so easy to use and because it is water-based and low odor so you can seal your natural stone without smelling up the whole house and neighborhood. Just spray it on.