Oil Off has another superior distinction over the competition; it is soap free and pumice free. Pumice based products will over time clog drains due to the insolubility of the pumice itself together with either the fats and or solvent based substances that contain the pumice, the industrial dirt being cleaned and calcium in the water. This common combination really wreaks havoc on plumbing. Oil Off, on the other hand, has the benefit of intelligence. It actually emulsifies the dirts of industry taking them safely down the drain and makes them more manageable for the environment. Advantage you again.