Pine Rosins PR 509.1 is a disproportionated gum rosin is a thermoplastic resin obtained by distillation of pine oleoresin–steam and modified by action of heat and catalysts to decrease the abietic acid content present in the natural Gum rosin. These resins are compatible with most well known compounds such as, EVA polymers, SIS, SBR, natural rubber, butyl rubber, hydrocarbon and terpene resins.