... Waterproof,environmental friendly 2.Corrosion resistant 4.Weather-resistant 3.Anti-UV Agent wpc outdoor pergola:1:the proportion of ... is:55% wood-fiber,30% recycle PE,15% additives(light calcium carbonate,talc,PE compatible agent,PE wax,pigment,etc ... resistance, and color stability4). Moisture/Water resistant,5). Barefoot friendly, anti-slip, less cracking, less warping,6). Requires no painting, ...