Leaders in co-extruded composite decking - Eva-Last InfinityTM has outperformed wood and timber on a global scale. GLOBAL PROOF OF INFINITY'S. PERFORMANCE. Engineered Polymer Co-Extrusion.Naturale Composite Decking Boards | NewTechWood Since we offer these products, we become a one-stop-shop for your backyard deck materials. The result is a capped wood plastic composite protected on all four.What is the difference between normal classic WPC boards and Co. Co-extrusion or capped deck boards are WPC second generation boards.. a surface coating which is similar to the cover of a golf ball – it is that strong.