... in rigid PVC products. 1. IntroductionYFG-902 is a Weatherable Acrylic Impact Modifier used in rigid PVC products. It is a “core ... .5Bulk density(g/cm3)0.40-0.55Equivalent Grade: FM-50, D-520, KM-355P, D-320, FM-40 etc.4 ... molding. Key applications include: Profiles, sheets, pipes, pipe fitting, etc. Acrylic Impact Modifier Grade: KM-355P