Road surfacing goop, also known as TAR, is a sticky, black substance used to seal and protect roads from the elements. It is made up of a combination of asphalt, sand, and gravel, and is heated and mixed together before being applied to the road surface. TAR is an important part of road maintenance, as it helps to prevent water from seeping into the pavement and causing damage. It also provides a smoother ride for drivers, as it fills in any cracks or holes in the road.