Gum Rosin Ester S Glycerol ester of stabilized gum rosin Whittaker Tackifier >> Rosin ester >> Glycerol ester Wax - Technical Grade Gum Rosin Ester S - Gum Rosin Ester S is a glycerol ester of stabilized gum rosin. This plant based natural product derivative has smooth glass like properties. Gum Rosin Ester S is typi-cally used as a tackifier in a wide array of applications. Note: Specific product application recommendations are available on request. Gum Rosin Ester S functions as a skin conditioner, emollient, tackifier and emulsifying agent. These functions allow it to be incorporated into a wide range of applications. The Gum Rosin Ester S also serves as a solublizer and thickener in clear lipsticks. Uses: Clear Lip Sticks, Depilatories, Stick Pencils, Make-ups, Mascaras & Hair Coloring Concentrations Used: 2 - 20% Glycerol ester of stabilized gum rosin. Used as a tackifier. Offers smooth glass. Use level: 2-20%.