Manual bay ultra concentrated engine degreaser, Vortex Engine Degreaser is a high alkaline concentrate that performs on the most stubborn of grease areas. Even though Vortex Engine Degreaser is highly concentrated, it does not produce annoying fumes or odors. The buffers in this compound make it safe to use on painted surfaces yet strong enough to degrease the most stubborn problems. Vortex Engine Degreaser's ultra concentrate allows for maximum dilution ratios for utmost economy.