WHAT ARE THE ADVANTAGES OF EPDM GASKETS? EPDM gaskets are the most tested and widely used sealing technique. For decades, the tested material has been used by window producers and other industries. Reliable sealing of media over a long period of time. Outstanding sealing properties in extreme weather conditions and excellent temperature stability (–40° to +150°C) in cold climate. If compared to gaskets made from other materials, EPDM gaskets are extremely resistant to wear, ageing, weather influences, ozone and UV-light. EPDM gaskets are colour-stable and leave no stains on PVC window frames.