There are three types of sealant strips commonly used

1. Modified PVC tape

Modified PVC tape: the price is relatively low, due to the different quality advantages and disadvantages, low-end products due to the use of waste, substitute plasticizer and high filling amount, resulting in poor elasticity of the tape, easy to hard, have a sharp nose taste, easy migration to yellow frame material, short service life. Because PVC products contain halogens and heavy metals in the stabilizer, it is not conducive to environmental protection. Therefore, developed countries abroad and domestic Beijing and coastal cities have eliminated or restricted the use of PVC tape.

2. Sulfide EPDM seal strip

The vulcanized EPDM rubber sealing strip: in terms of sealing elasticity durability is stronger than PVC adhesive strip, but due to the need for microwave vulcanization line finalization, high processing energy consumption, usually more than 20 times of PVC processing, the product can not be reused, not environmental protection, not national advocacy of products. So the basic door enterprises are not used.

3. Thermoplastic EPDM seal strip

The thermoplastic EPDM rubber sealing strip is a new material developed on the basis of foreign introduced technology and domestic independent research and development in recent years. It is mainly used for automobile doors and Windows sealing strip. In recent years, it has been used for building doors and Windows sealing strip.