Foreverest Resources Glyceryl Rosinate (Industrial) G1004 is a Glycerol Ester of Gum Rosin, Ester Gum, GEGR. The Industry grade of Glyceryl Rosinate (a polyol ester of rosin), also called Glycerol Ester of Gum Rosin (GEGR), which is used for specialty industries of adhesives,coating and paints. It is also widely used in polymers including EVA, acrylics, polyurethanes, SIS and SBS.