An oleoresinous exudate from coniferous trees, especially of the Pinus genus. Balsams have been used since antiquity for medicinal purposes and as sealers. The exudate is a soft, semi-liquid consisting of terpenes of resinous character and a large amount of essential oils. Upon distillation, a liquid portion, called turpentine, and a solid residue, called rosin, are produced. Balsams have been used in varnishes and paint mediums; however, they deteriorate easily unless a harder resin is mixed with them.
