Along with the development of science & technology and living level, and the call on material saving and harmonious society by the government, our government has attached enough importance to windows for it is the eyes of a building and it
wear off 40% of total material. Especially, in 2004 , Beijing the capital of China consider the heat transmission coefficient of a window as the quality confirmation index enforceability. Arising a great attention and practice in all cities around our whole state, now the material saving window has been the artery in the architecture system.

The material saving window mainly made up of profiles, hardware accessories, glass��EPDM sealing strips and machining process. Because the sealing strip cost is low and the traditional concept affect that people ignore the material
saving standard, the sealing strips are always be ignored by many window product factories. However, The sealing strips have the most important affect in the window system, which affect of EPDM sealing strip take on in the window system? The sealing strips are installed in the window frame leaves and
glass, Depending on its excellent elasticity capability, EPDM can connect the profiles, hardware accessories and glass together, and make them as a whole. According to the base principium equal press design of the material saving window, the sealing strips have the function of sealing equal press, consequently achieve the weather resistance,air-tightness,elasticity capability standard and material saving standard of window, it have the critical affect on increasing the air-tightness, water-tightness and sound insulation ability of window, and make the window to be the qualified material saving window.