As steel panels become thinner, issues such as lower rigidity and higher noise generation arise. Nitto's solution to such problems is NITOHARD, an epoxy foam type reinforcing and vibration-damping material for steel panels, developed using Nitto's original polymer technology. An adhesive material is applied to the epoxy resin material, enabling it to firmly adhere to steel panels and to conform to curved surfaces. NITOHARD is expanded and hardened using the heat released during the paint-drying process. It provides partial reinforcement for steel panels.