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