Early uses of bitumen in history
- Waterproofing
- Adhesives
- Mortars
- Works of Art
- 1830s in Europe
- 1870s in USA
- Maltenes
- Asphaltenes
- Solid
- Softens with temperature
- Non-volatile
- Black
- Waterproof
- Adhesive
- Cohesive
- Durable
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