Manufactured with specially formulated polyurethane and combined with fire retardants and UV inhibitors, NextStone insulated stone siding panels and accessories are cast from actual stone and rock patterns. Our unique manufacturing process gives NextStone products the most authentic faux stone siding look on the market today. NextStone siding panels can be easily installed at home with no formal training. The innovative panel have been designed to totally rid the need to hire masonry installers, professional siding installers or skilled laborers. Each of the easily managed, lightweight panels only weigh about 1 lb./sq. ft., removing the need to pay for additional materials, equipment or labor. Color: Sandstone Charcoal. Material: Composite.