... fungus agent, coupling agent, reinforcing agent, lubricants.)1.Difference between WPC and WoodWe can save 2.7cbm natural timber when use ... no Contraction/expansionDistorting effected by chang of moisture and temperatureUV ResistanceHigh Grade UV ResistanceEasily effected by UVFading ... , Brown, Dark brown, Light gray, Dark gray, Black,white,Wood,Cedar,Copper brown,Sandalwood,Coffee,Grey 5.Test ...