Bitumen is primarily used for industrial purposes. It can be found in the construction industry where it is used to make roads, which is why it is commonly called asphalt in this application. It also has waterproofing and adhesive properties, which makes it a good product for roofing. When people hear the word bitumen, they may often think of the roads on which they drive.  Bitumen is a byproduct of crude oil. It is commonly produced through a refining process in which crude oil is reduced. It removes lighter crude oil components and leaves behind the heavier bitumen.