Formulated for all Auto-Scrubber machinery. Most walk-behind scrubbers are 25 gallons, in which case drop 2 PAK-It®s into reservoir and add water. You can also use it as a heavy-duty degreaser by dropping 1 PAK-IT® in a 5 gallon mop bucket. To strip a floor drop 2 PAK-It®s in a 5 gallon mop bucket. Safe for use on all nonporous surfaces.