Road sealant is a material used to fill cracks and seal surfaces in roads, driveways, and other paved areas. It is typically made of asphalt, which is a mixture of bitumen and aggregate materials. TAR is a type of road sealant that is made from coal TAR, which is a by-product of the production of coke and coal gas. TAR is often used to fill cracks and seal surfaces in roads, driveways, and other paved areas. It is also used to waterproof roofs and protect wood from decay.