Concrete Mortar Dissolver can be used to remove cured cement, concrete, mortar, or stucco from most surfaces. Nonfuming, noncorrosive, 100% biodegradable product contains no muratic, sulphuric, or phosphoric acid. Will not damage tools or equipment, and won't harm paint, rubber, plastic, vegetation, grass, or metal. Safe for drains. No need for respirators or protective clothing when using product. 23 oz (ounce) spray bottle.