Polymer-coated decking is using the latest technology of co-extrusion. New material capped outside, the shell is made of a high performance and moisture-resistant polymer which is anti-scratches and easy to clean as well as keeps the core inside from water absorption. The shield and core are extruded simultaneously, so there are no adhesives or chemicals that are harmful to the environment. Natural surface and stable quality make the second-generation co-extrusion decking become more and more popular in the yard. The hollow type is more affordable compared to the solid type.