Polyurethane rubber is divided into two major categories of polyester type and polyether type, compared with the other rubber, have very good wear resistance, the tensile strength of the polyurethane rubber is the highest of all rubber, it has the oil resistance of NBR.

一般應用于物理機械性能要求高的產品，如耐磨制品、高強度耐油制品和高硬度高模量制品等。在液壓與氣動、采礦工業(yè)、土木工程、工程機械、紡織機械等行業(yè)中都有廣泛應用。

1. 聚酯型：有油膜工況下的往復運動密封件，適合于高壓或超高壓低速油缸。

2. 聚醚型：耐低溫、耐水解性較聚酯型好。