Bitumen

Bitumen is a viscous substance that exists in a liquid to a semi-solid phase. Crude oil is the primary source of bitumen for the industry. Crude oil is a mixture of different compounds that is separated by a distillation tower. The remnants of the distillation tower, called vacuum bottom, are transferred to be processed and turned into bitumen. 

Bitumen is a beneficial material that is used in various industries. More than 85% of the world's bitumen production is used for road construction, 10% is used in other constructions and 5% is used in a variety of other industries, including insulation.