Polyurethane is a thermosetting plastic that tends to retain its shape. The ability to be molded into almost any shape, size and hardness makes PU extremely versatile. This material is often used as a substitute for rubber components whose quality deteriorates over time. With the properties of flexibility and resistance under stress, tension or compression, PU easily outperforms rubber. In addition, Polyurethane has better abrasion, aging and tear resistance than rubber. Polyurethane Rubber