I created this product to solve an age old problem with concrete driveways and garage floors. Old, dried-in, embedded oil stains in concrete. The microextracting technology absorbs, lifts and removes deep oil-based stains and dries to a powder for easy removal. Simply pour the product over the stain (the consistency is like pancake batter), allow it to sit (5 to 8 hours or longer depending on the stain) then simply sweep up the remaining powder. No need for heavy scrubbing or rinsing. It will also remove stains caused by grease, antifreeze, transmission fluid, tar, wax, cooking oils, food grease and hydraulic fluid. Any oil-based material is no match for this cleaner. It's phosphate-free and biodegradable making it safe for the environment. Nice orange smell too as it uses the cleaning power of citrus. The gallon container covers approximately 24 square feet. Best when used above 60°F. If your stain is bigger than that, you've got a serious oil leak! Fix your car. Not for use on asphalt.