... and 20% additives such as coupling agent,reinforcement agent,anti-UV agent,stabilizing agent,foamimg agent,foaming adjusting agent etc ... ,Its water-proof,anticrash,flame retardant(pass B grade),anti-corrosion,UV-protected,sound&thermal insulation and energy saving. ... stronger,widely used as building decoration,especially for outdoor wall cladding,outdoor flooring and garden ornaments or accessories.5, ...