Bitumen is a semi-solid hydrocarbon item delivered from refining rough additionally happens actually. It is regularly alluded to as black-top and the terms are ordinarily utilized reciprocally; be that as it may, bitumen is the dark oil item while black-top is a blend of bitumen and total stone. It is a substantial, gooey material, is profoundly impervious to water and to natural components and requires stockpiling and transportation at high temperatures.