Aluminum composite panel (ACP) also aluminum composite material (ACM) is a type of flat panel that consists of two thin aluminum sheets bonded to a non-aluminum core. Aluminum sheets can be coated with PVDF, fluoropolymer resins (FEVE) or Polyester paint. Aluminum can be painted in any kind of color, and ACPs are produced in a wide range of metallic and non-metallic colors as well as patterns that imitate other materials, such as wood or marble. The core is commonly low density polyethylene, or a mix of low density polyethylene and mineral material to exhibit fire retardant properties. ACPs are frequently used for external cladding or facades of buildings, insulation, and signage.