... :2008 certificate 3.wood plastic additive YM-900 is pvc foaming regulator developed by our R&D center with ... ,to be used as foam regulator for kinds of pvc foam products,which can efficiently improves quality and processability ... Uniform cell structure With high surface glossApplications: PVC foam window frames, panels, siding, fences, sign boards, roofing sheets, pipes, fittings, injection ...