Hydrogenated resin is produced through the controlled hydrogenation of basic aliphatic, aromatic, dicyclopentadiene or mixture. A hydrogenated hydrocarbon tackifier resin is the best choice when color and stability are overriding concerns. Usually these resins are colorless (water-white) and are very stable to heat, weathering, and oxidation. Most are hypo-allergenic, with no skin-sensitization properties and are ideally suited for adhesives used in the medical industry where these considerations are critical.