TPU Isoplast® Thermoplastic Polyurethane TPU Isoplast® Thermoplastic Polyurethane plastic is used to make parts including screws, hex bolts, hex nuts and many custom components. Because of its high strength and impact resistance thermoplastic polyurethane TPU Isoplast® is used when a rigid polymer is needed due to its high strength and impact resistance. Technically thermoplastic polyurethane is a thermoplastic elastomer made up of block copolymers which have hard and soft segments. Basically a TPU