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.