... 2008 certificate 3.wood plastic additive YM-900 is pvc foaming regulator developed by our R&D center with ... products,which can efficiently improves quality and processability of PVC resin by reducing foam density and increasing impact strength, ... With high surface glossApplications: PVC foam window frames, panels, siding, fences, sign boards, roofing sheets, pipes, fittings, injection molded parts ...