... fiber) 10% chemical additives (Anti-UV agent, Anti-oxidation agent, stabilizers, colorants, anti-fungus agent, coupling agent, reinforcing agent, lubricants...etc.)Product Details: Product NameWPC exterior ... natural wood grain, color and texture, looks like nature wood.3. Waterproofing, fireproofing, Mildew-resistant, anti-UV.4. Less cracking, less ...