... concentricity 4.No bubbles 5.Smooth surface 1. What is polyurethane?Polyurethane (commonly abbreviated PU) is a unique material that offers ... replace rubber, plastic and metal with the ultimate in abrasion resistance and physical properties. Polyurethane can reduce plant maintenance and OEM ... parts, Gaskets, Seals, Rollers, Roller covers, Sandblast curtains, diaphragms. Screw coated with polyurethane