Colophane 25 AF Fumaric rosin DRT Tackifier >> Rosin Rubber - Elastomer (Chloroprene, Butyl …) ADHESIVE For over 60 years, DRT have been supplying a complete range of rosin derivatives based on Gum Rosin and Tall Oil Rosin for a variety of applications : adhesives, chewing gum, rubber, printing inks, pigments, cosmetics, soldering fluxes, road marking compounds, paint and varnishes, etc … ACID RESINS COLOPHANE 25 AF Fumaric rosin Fumaric rosin, acid resin. Used as a tackifier in adhesives.