... fibers and 20% additives such as coupling agent,reinforcement agent,anti-UV agent,stabilizing agent,foamimg agent,foaming adjusting agent etc ... ,or by co-extruding into a desired shape with pvc or ASA coated(anti-fading).2,Two typical types:wpc free foaming ... encrusted foaming.3,Its water-proof,anticrash,flame retardant(pass B grade),anti-corrosion,UV-protected,sound&thermal insulation and energy saving ...