Sylvaros PR RX Tall oil rosin Arizona Chemical Natural Resins & Gum >> Rosin Coatings SYLVAROS® PR RX Resin is a stabilized tall oil rosin with excellent resistance to crystallization. A Balance of properties is achievable with EVA, PE, and PP containing hot melt adhesives. This polar resin can be used to promote adhesion to difficult-to-bond surfaces. Resistant to crystallization, available in drums High acid number Uniform composition versus gum rosin Ease of handling More versatility for purchasing Good adhesion to low energy surfaces Maintains adhesion at low temperature More consistent final products Hot melt coatings Stabilized, polar, tall oil rosin. Used in hot-melt coatings. Offers very good resistance to crystallization and high acid number. Can be used to promote adhesion to difficult-to-bond surfaces. Gives ease of handling.