Bio-Plastic Solutions. Made from a sustainable corn-based resin, BioBead Corner Bead is intended as a replacement for PVC or ABS corner bead and is an alternative to metal corner bead where moisture and rust are concerns. Comprising 82% bio-based carbon content, the material is mechanically and thermally stable, emits no known toxic VOCs, and contains no known hazardous chemicals. BioBead will initially be available in five basic profiles in 8-, 9-, and 10-foot lengths. 507.583.0097. www.bioplasticsolutions.com.