Whether you install these with Montauk Blue Natural Gauged Slate Tile from MSI in a commercial or residential application, they will add a distinctive personal touch. The tiles measure 18 in. x 36 in. and are a GREENGUARD certified Genuine Stone. The elegant shades of blue and gray will add a chic look with a textured, low-sheen finish and highly skid resistant surface. The filling can work its way out and it may be necessary to refill these voids as part of a normal maintenance procedure. All natural stone products should be sealed with a penetrating sealer. We recommend blending tiles from different boxes when installing since natural stone products inherently lack uniformity.