Bitumen is a viscous, black, semi-solid form of petroleum that is often used in the construction industry as a binding agent for asphalt in roads and roofing materials. It is also known as asphalt or tar, and is derived from crude oil through a process of distillation. Bitumen has a high carbon content and is made up of complex hydrocarbons, which give it its characteristic properties of high viscosity and resistance to water and other chemicals. It is commonly used in road construction because of its ability to withstand heavy traffic and extreme weather conditions, and is also used in the manufacturing of various products such as adhesives, sealants, and waterproofing materials.