Decorative Panels says its GreenCore Signature S2S hardboard panels feature a highly refined, 100% aspen overlay and PureSolid core for strength, with smooth surfaces on both sides that resist delaminating and limit water absorption. Panels contain no added urea-formaldehyde, and are rated CARB-exempt and compliant, the company adds. (800) 521-4301, DecPanels.com