Exterior grade MDF (Extira) for your outdoor mosaic art. Available in many sizes and 1/2" thickness.
Extira is a green panel product that is moisture and rot resistant, and offers excellent performance in exterior environments. As measured by ASTM D1037-99, Extira panels showed thickness swell approximately 40% less than MR 50 MDF. This product is used by the sign industry because of its ability to withstand exterior conditions better than MDF and plywood.