Powerful, rust stripper removes corrosion from steel and other ferrous metals. Gets rid of flash rust in as little as 15 minutes, cleans heavily rusted steel overnight. Environmentally safe formula attacks the rust but won’t hurt the metal underneath, so it’s great for restorations where bead-blasting and repolishing are undesirable. Penetrates dirt and oil, eliminating need for pre-cleaning on most jobs. Safer than traditional acid “pickling” processes. Non-flammable, acid-free, and biodegradable with low toxicity and minimal odor. Easy, one-step process doesn’t require multiple baths or rinses. Use full-strength straight from container, no messy diluting, mixing, or measuring. Re-usable - one gallon cleans up to 325 lbs. of rusty metal. Solution turns black when its rust removal properties have been exhausted. Also great for de-rusting tools, autos, bikes, antiques, lawn furniture, and many other items around the house or shop. SPECS: 1 gal. (128 fl. oz./3.8 liters) plastic jug.