Plymax is a building material, used in airplanes. It consists of a thin sheet of duralumin bonded to a thicker sheet of plywood. Most notably it was used in the Morane-Saulnier M.S.406, and French aircraft of the 1930s. It was also used on the bodies of some cars such as a 1931 Triumph Super 9. The articulated body of the Trojan Tasker also used this material.