ACP (Aluminum Composite Panel) ALCOTUFF contains a core of refractory core between 2 pieces of aluminum. the back side is coated with Polyester. And the front side is coated by X-TRA Durable PVD (Polyvinylenefluoride) or FEVE (Fluoroethylene Vinyl Ether). OTHER FEATURES ACP ALCOTUFF Very flat. Each Alcotuff aluminum sheet is only 0.5mm thick. Coated goes through our co-extrusion process which prevents the coating from becoming uneven. Very sturdy and impact resistant. Easy to work on and flexible design. Easy, bent, cut and can be installed quickly. Good insulation and anti-vibration.