1. modified PVC strips:

       The price is relatively low, due to the varying quality of the merits, the price is generally between 6000 yuan 15,000 yuan / ton. Low-end products due to the use of waste, alternative plasticizer and high filler content, to make elastic tape is poor, prone to hard, there are assassination nose smell, easy migration to make frame material yellow, short life. Few low-level price competition in the doors and windows are still in use. The high-end PVC strips can meet the standard indicators, life is relatively longer.

       2. The thermoplastic EPDM rubber seal:

       The seal is developed in recent years on the basis of technology introduced from abroad and domestic independent research and development of a new material, mainly used in automotive sealing doors and windows, in recent years begun to seal doors and windows for buildings.

    3. vulcanized EPDM rubber seal:

       In terms of durability sealing elastic than PVC strips greatly enhanced, but because of the need microwave curing line shape processing of high energy consumption, usually more than 20 times the PVC processing, the product can not be reused, not environmental protection, not a national advocacy product. In addition, the proportion of these product materials (1.4 above) quite (low specific gravity greater vulcanized EPDM seals) and a PVC type windows with PVC strips similar rate, the cost is relatively high, doors and windows are difficult to accept.