Aluminum metal composite materials ( ACM ) are produced by laminating two thin sheets of aluminum on either side of an extruded thermoplastic core. Other metal composite materials are also available ( stainless, copper, zinc, bronze, etc.. ). The metallic surfaces are prefinished and coil-coated in a variety of paint finishes before bonding. ACM panels offer the rigidity of heavy-gauge sheet metal in a lightweight panel that’s easy to fabricate and adaptable to a vast range of indoor and outdoor building applications. Aluminum composite materials ( ACM ) offer a modern approach to building wall panel design. Used for both exterior and interior applications, ACM’s provide the ability to provide large format panels with a very smooth appearance ( no “oil-canning” ). Panel sizes up to 48” x 240” are examples of the sizes available.