It is a product extruded by combining EPDM (Ethylene Propylene Diene Monomer) foam and dense material. It has advantages such as high weather resistance, high elasticity, high sealing performance, high sound insulation, and light weight, making it the best choice for high-end doors and windows.

Its disadvantages include complex production processes and high rejection rates. It can be used at 100-120°C for a long time, can maintain effective physical properties for a relatively long period at 140-150°C, and can withstand high temperatures of 230-260°C for a short time. The optimal operating temperature range is -60°C to +150°C.