Michael Harding Oleo-Resin Medium is a historic glaze medium based on light coloured Canada Balsam fused with Dammar Resin and Linseed Stand Oil. It gives a gloss finish and imparts depth to the paint film.Michael Harding oil paint mediums have been developed to enhance and facilitate the effects of known oil paint techniques. Throughout history painters have always manipulated paint in search of the perfect paint film and finish. Michael Harding Oil Mediums are fully compatible with Michael Harding oil paints and can guarantee long-term stability.