Proline Decorative Concrete Systems 5IS 60" x 60" Seamless Italian Slate Concrete Stamp. "Avere un bell'aspetto" in Italian means to make beautiful- and that's exactly what Proline's Seamless Italian Slate will do to any area of your home or workplace. Italian Slate in its natural form is relatively soft and therefore used primarily for billiard tables. Proline has replicated the stunning look of Italian Slate with the endurance of concrete. Seamless textures continue to be a favorite among Proline users due to the ease and quickness of installation, the durability and low cost of concrete, the clean look with less grout lines and it's overall beauty.