... cracking and moisture3. CE Certificate SummaryTaixu Wood-Plastic Composite (WPC) railing bar is manufactured from a combination of plastic, ... 35%~40%Grade A HDPE, 10%~15% additivesSurface treating methodBrushing, grooved, sanding, embossing etcApplications Garden, park, landscape, villa, summer house, ... resistant, Durable12.Dimension stability against moisture and temperature qingdao WPC fence board