This is a Anodized Aluminum tile backsplash that Van Osdol Marble and Tile installed in Sarasota Florida. With this type of backsplash there isn't any grout so it is very important to create a very tight fitment of the tiles. The tiles do not require sealing. It is critical that your substrate is flat and free of any defects prior to installing the tiles otherwise lippage will be evident in your installation. For superior marble and tile installation seek out a contractor with a track record of 100% customer satisfaction.Tiles can be very expensive and difficult to install so hiring the right is contractor is key. Read what people are saying about the person you are considering to do your job it could save you money in the long run. To research more about Mark Van Osdol and his company Van Osdol Marble and Tile check out his website on Houzz. It features pictures of his craftsmanship along with customer testimonials. The link to his site is www.TilePro.info