Cor (Alumakor) is an aluminum composite material system (ACM). Cor (Alumakor) is available in ACM sheets, fully fabricated extrusion attachment systems, and matching aluminum flat sheets. It is also available as components for field fabrication. Standard or custom panel designs are available. Lumabuilt has been providing ACM systems for more than 20 years. Cor (Alumakor) is a fully integrated and tested system.