The pro-level heavy-duty floor stripper concentrate is fast-acting and ammonia-free. The concentrated, high-alkaline formula goes on quickly with a scrubbing machine or a cotton mop and commercial mop bucket with a wringer, then digs deep to remove stubborn finishes and heavy buildup in preparation for a new finish. It is ideal for use in offices, businesses and warehouses. 1 gal of concentrate makes 9 gal of floor stripping solution.