Sylvaros PR R-85 Dimerized rosin Arizona Chemical Tackifier >> Rosin >> Dimerized rosin ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) SYLVAROS® PR R-85 is a polymerized rosin with unique properties that enable it to totally or partially replace gum or modified rosins for improved properties. SYLVAROS PR R-85 has compatibility and solubility features which allow it to be used in a variety of adhesive, coating and compounding applications. Good Compatibility High Acid Number surfaces Flaked Form Improved strength properties in adhesives Good adhesion to difficult-to-bond Eas of handling Pressure sensitive adhesives Construction adhesives Pick up gums for labelling Adhesion promoter for difficult-to-bond substrates High acid number, polymerized rosin. Can replace gum or modified rosins for improved properties. Possesses compatibility and solubility features which allow it to be used in a variety of adhesives. Can be used as adhesion promoter for difficult-to-bond substrates.