To improve the decorative properties of WPC, the surfaces are often embossed to resemble wood. The colouring is usually realised by colouring the polymer matrix. However, a lot of pigments are needed and the colour brilliance is not very pronounced. Another option is coextrusion with a coloured PE. However, due to time-consuming re-setting procedures, both processes are not suitable for flexible colour change. Sustainable water-borne paints have therefore been developed that provide a durable protective coating on the WPC for outdoor applications. Weathering results over a period of 10 years are presented. The WPC ...