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. bituminous material
8. natural bituminous material
9. bitumen (material)
10. asphalt (bituminous material)
11. modified asphalt

Anotations

Scope note:

Dark brown or black solid to semisolid material that is the organic, or hydrocarbon, portion of asphalt. It was used in ancient times as a sealant, for example in ancient Egypt. It is currently is used in hot-melt adhesives, coating, paints, sealants, roofing, and road coating.