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They are developed from completely different sources. Asphalt is a product made from crude oil. Coal tar comes from coal, as its name implies. This means that even though these two products look and may even smell similar, they are very different. Asphalt has a higher softening point than coal tar.Tar is a black sticky substance that is used to hold roofing tiles in place.Asphalt is used to build city roads and contains rocks and small stones.
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