is made of EPDM mixed with butyl rubber, vulcanizing agent, accelerator, softener and reinforcing agent, through mixing, filtering and extrusion. 
➡Good tensile performance, large elongation, can better adapt to the needs of base expansion or cracking deformation. 
➡High and low temperature resistance can be used in harsh environment for a long time. 
➡The light weight can reduce roof load. 
➡It can also be made through cold construction, with a convenient operation, which reduces environmental pollution, and improves the working conditions of workers.