... fiber) 10% chemical additives (Anti-UV agent, Anti-oxidation agent, stabilizers, colorants, anti-fungus agent, coupling agent, reinforcing agent, lubricants...etc.)Product Details: ... like nature wood.3. Waterproofing, fireproofing, Mildew-resistant, anti-UV.4. Less cracking, less warping.5. No ... Low maintenance, durable, economic, long lifetime10. Anti-slip, less cracking, less warping.Product Photos: