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Sealing strip construction industry domestic epdm rubber sealing strip and similar foreign products than the market price about 40% lower, but still slow development, the reason for this is that the user has not yet aware of the sealing strip making small proportion in the total cost in doors and Windows, just considering the cost savings, without considering the comprehensive benefits of premium quality sealing material. Domestic plastic doors and Windows sealing strip because of the development of late, the original cross section shape is simple only for glass bead article seal using "K" form, window frame (fan) seal USES tablespoons of article and article gauze fan used by small "0", the variety is relatively single. Foreign sealing strip, on the other hand, with the development of plastic doors and Windows, its production has reached the standardization, scale, the design of each product section are accord with the requirement of related functions, cooperate with corresponding profiles between almost close to perfect.
With the introduction of foreign Windows make technology in recent years, the cross section shape of domestic sealing strip and variety are also great changes have taken place, but because of the domestic mould making process, as well as the value of the sealing material as one of the doors and Windows accessories in China with the importance of insufficient, lead to products produced from the shape close to the shape of the design, use function still has some defects, such as matching parts clearance is bigger, finished product of the pressure and the amount of overlap quantity can not meet the relevant requirements, etc, so that in use process will inevitably appear some quality problems. Sealing gasket is metal or non-metal plate material, the cutting, stamping or cutting technology, used in sealing connection between pipe, machinery and equipment parts and seal connections between the parts. According to the material can be divided into metal and nonmetal sealing gasket sealing gasket. Metal is copper gaskets, stainless steel sheet, iron sheet, aluminum sheet and so on.