Classic Organic Concrete Cleaner is an innovative organic acid alternative with zero VOC and eliminates the need for neutralization. It effectively eliminates grease, oil, efflorescence, grout haze, cement residue, calcium and more. EPA-approved as a non-food inert ingredient in biocide applications, this cleaner is both non-hazardous and biodegradable, ensuring safety for both users and the environment. Versatile for use indoors and outdoors, in various traffic conditions and climates, it's a go-to solution. With its environmentally friendly composition, cleanup is a breeze with just water. Its concentrated formula allows for versatile dilution, optimizing cleaning efficiency while minimizing costs. Outperforming citric acid, glycolic acid and phosphoric acid in dissolving calcium carbonate, it's the top choice for cleaning and etching. Classified as a mild skin irritant, yet non-corrosive to skin and mild steel, it offers effective cleaning without compromise. Mix 1 qt. of concentrated cleaner with 1 gal. of distilled water for 3-minutesto 4-minutes. Coverage is approximately 250 sq. ft. to 400 sq. ft. depending on application technique and surface composition.