Best® tar remover is a super penetranting dual acting formula contains mild solvents and polishing agents strong enough to chemically dissolve and remove bugs, tar, oil, asphalt, grime, road, film, tree sap, road oil, paint spots and stubborn stains. Yet best® tar remover gentle enough not to harm a cars finish.it’s polishing agents physically facilitate removal of more stubborn stains and enhance the micro-smoothness of the surface. ideal for car finishes.