Let the detergent sit for 45 minutes then pour boiling water on the area and vigorously scrub the stained section with the broom.
Muriatic acid to clean concrete garage floor.
Acid etching is the process of applying hydrochloric muriatic or buffered phosphoric acid to a slab then rinsing it off with water.
Laitance is a weak milky accumulation of fine particles of cement dust lime and sand fines on the surface of fresh concrete usually caused by an excess of water bleeding to the surface.
Spray the floor with water until it s completely wet.
Pour dry dishwasher detergent or a concrete cleaning agent on the stain.
What is etching concrete.
Acid washing also known as acid etching prepares a concrete surface to accept a sealer.
For example muriatic acid is sometimes used to clean concrete and masonry.
Muriatic acid is one of the stronger acids so you ll need lots of caution and safety gear rubber boots or coveralls respirator mask safety goggles and thick gloves step 4 apply the acid before you can apply the acid wash to the flooring you have to first lay a layer of water.
Acid washing is dangerous for people plants and metal objects especially indoors where fumes can concentrate.
While some stains can be rinsed away with a pressure washer tougher stains such as rust require an acid based cleaner like muriatic acid.
You can also use acid in weaker concentrations to remove white mineral deposits efflorescence and heavy grime.
For stubborn stains use muriatic acid in combination with your pressure washer set to at least 1200 psi.
For many years it was a standard method of concrete preparation used by nearly all industrial commercial and institutional floor coating.
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.