Yes. Most materials exposed to UV and other weathering effects will fade. WPC products are blended with high quality raw material and UV-inhibiting pigments to minimize fade and produce products consistent in color. All products will fade evenly.
As WPC is an extruded blend of wood and polymers, the polymers component in the product gives it excellent resistance from the elements , making it far more water resistant than natural timber. However it should be noted that WPC is not designed to live in water this will eventually lead to moiture absorption and can cause the product to swell.