TAR / COAL TAR
Coal tar is a by-product derived from 
coal during the manufacture of domestic town gas. It was commonly used 
in the UK as a binding agent for aggregate in the construction of 
highways, car parks and paving until the 1980's when North Sea gas was 
introduced and town gas works closed.
USED FOR : 
It is used as a base for coatings and paint, in roofing and paving,
 and as a binder in asphalt products. Both coal tar and coal-tar pitch 
contain many chemical compounds, including carcinogens such as benzene.
Properties: 
Properties of Coal Tar
 Coal tar is black in color. It's a semi-solid and semi-liquid in nature and is less permeable. Its density is very thick and It has a peculiar smell. Tar is insoluble in nature which means that it can't dissolve in water.
 
  
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