Bitumen is defined as a viscous liquid or solid, consisting mainly of hydrocarbons and their derivatives, which is soluble in trichloro-ethylene and is largely non-volatile and softens slowly on heating. It is black or brown in color and has waterproof and adhesive properties. It is obtained from petroleum by refinery processes, and is also found as natural deposits or as a component ... https://www.cgoc.in/post/what-is-bitumen