Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material
7. gum (material)

Anotations

Scope note:

The balsam exudate obtained from several North American trees, including the longleaf pine, Pinus palustris, the Cuban pine, Pinus caribaea, and the loblolly pine, Pinus taeda. Gum thus is a thick, yellowish, sticky mass with a characteristic piney odor. It is used as an additive in oil paints, an insecticide, a polish, and as an antiseptic agent.