Bitumen, dense, extremely viscous, petroleum-based hydrocarbon which is found in deposits such as oil sands and pitch lakes (natural bitumen) or is obtained as a residue of the distillation of crude oil (refined bitumen). Bitumen is often called asphalt, though that name is almost universally used for the road-paving material made from a mixture of gravel, sand, and other fillers in a bituminous binder. This material comes in high demand due to its ever-increasing use in modern urban construction. We supply quality bitumen.