1.For PVC window frames, panels, fences, sign boards and WPC ... 3.wood plastic additive YM-900 is pvc foaming regulator developed by our R&D center with high ... and very fast plasticization,to be used as foam regulator for kinds of pvc foam products,which can ... matrix Uniform cell structure With high surface glossApplications: PVC foam window frames, panels, siding, fences, sign boards, roofing sheets ...