Surfacing Materials: Coverings ETCMBDC has given Bio-Glass, from Coverings ETC, silver certification. Bio-Glass is made from 100 percent post-consumer recycled glass and can easily be recycled by the final customer as well. It has no colorants or other additives, but is available in shades ranging from white to dark brown. Available in 110-in. by 49-in. slabs, it can be used for flooring, countertops and other decorative surfaces. The layers of compressed glass pieces create unique patterns through which light permeates resulting in a solid surface that appears lit from within.