Polyurethane Duralst 4203 sealing material is suitable for environmentally friendly fluids and has been tested to ASTM D3131-81 (2001) for hydrolytic stability at 185° F and 98% relative humidity. In testing, tensile strength decreased only 0.7% after 72 hr and 4.6% after 576 hr. Seals available in many configurations for rod, piston, and special sealing applications.
American High Performance Seals Inc., (412) 788-8815, www.ahpseals.com