Powerful & Concentrated Emulsifying Cleaner, Classified Heavy-Duty Degreaser for Oil, Grease, and Sludge Removal. Tankclean ECO is concentrated formulation designed to break down and emulsify heavy oils, grease, carbon deposits, removal of coaltar, crude benzene, lube oils, Petroleum distillate, pyrolyze gas oil, bitumen & similar and petroleum-based sludge. It is especially effective in demanding environments such as marine vessels, refineries, engine rooms, and industrial plants.