Goes on quickly with a cotton mop or scrubbing machine, then digs deep to remove stubborn finishes and heavy buildup. The ammonia-free, high-alkaline formula is concentrated so one gallon makes nine gallons of floor stripping solution. Heavy-Duty floor stripper goes on quickly with a cotton mop or scrubbing machine, then digs deep to remove stubborn finishes and heavy buildup. The ammonia-free, high-alkaline formula is concentrated so one gallon makes nine gallons of floor stripping solution. Not for use on marble, natural stone or wood floors. Goes on quickly with a cotton mop or scrubbing machine. Digs deep to remove stubborn finishes and heavy buildup. Ammonia-free, high-alkaline formula. Concentrated, so one gallon makes up to 45 gallons of stripping solution.