Cleaning Oil From Concrete With Muriatic Acid

Make sure the detergent you use is ammonia free.

Cleaning oil from concrete with muriatic acid.

The acid works well on concrete and on many masonry projects because it neutralizes alkalinity. Muriatic acid is diluted hydrochloric acid and is a very potent chemical. Use it only as a last resort to clean stains. The surface becomes etched and clean which allows for the proper adhesion of a new coating.

Mixing ammonia with bleach creates a lethal gas similar to mustard gas. Mold rust and other stains can mar the clean beauty of your concrete lessening the visual impact and even the curb appeal of your property. Scrub the gray stain with a solution of 1 cup liquid chlorine bleach 1 cup powdered laundry detergent and 1 gallon of very hot water. While some stains can be rinsed away with a pressure washer tougher stains such as rust require an acid based cleaner like muriatic acid.