Profile: Composites Uk Ltd. specializes in composite production. We provide polymer matrix composites, metal matrix composites and ceramic matrix composites. Our polymer matrix composites materials use a polymer-based resin as the matrix, and a variety of fibers such as glass, carbon, aramid and natural fibers as the reinforcement. Our metal matrix composites are increasingly found in the automotive industry. These materials use a metal such as aluminum as the matrix, and reinforce it with fibers such as silicon carbide.