Citrikleen^® HD is a patented blend of a natural hydrocarbon solvent (non-petroleum), carbon removers and surfactants. It is specifically formulated to dislodge and reduce carbonaceous soils, gelled oils and grease masses into easily rinsed particles to leave a clean surface. Requiring no heat, Citrikleen HD has a pleasing odor and high efficiency. Permitted to stand overnight, oils, greases and carbonaceous particles will rise to the top of the tank and may be skimmed off.