Jesse Im/bugonmyleaf It's a natural poured concrete tiles without the sealer. It will get slightly darker and shiny after the sealer but you can choose to have matte finish as well.
Obviously, a single sail like this does not provide full coverage, and protection shifts as the angle of the sun changes throughout the day and the year. "The fun comes in with 3-D computer modeling," says Jones. "I create shadow mapping studies that show how the shade will move around during any time of day, any time of the year."