Phosphoric Acid Garage Floor

Start on an area of concrete that isn t too noticeable.

Phosphoric acid garage floor.

Apply the diluted phosphoric acid to the concrete with a nylon scrub brush. Mix 1 part acid to 3 parts water for sufficient strength. Acid etching is the process of applying hydrochloric muriatic or buffered phosphoric acid to a slab then rinsing it off with water. Use a sprayer or watering can to distribute the acid.

Do not allow the phosphoric acid to dry on the concrete. Both types of acids can remove rust from concrete flooring. Allow the solution to remain on the surface for about five minutes as you continue scrubbing with the brush. Acid etching as a surface preparation is the process of applying an acid solution to a concrete surface allowing the acid to react with and etch the concrete.

For many years it was a standard method of concrete preparation used by nearly all industrial commercial and institutional floor coating installers depending on the floor size and system to be installed. Professionals recommend testing the strength needed on one area before applying it on the entire garage floor. Phosphoric acid can emulsify oils something that hydrochloric acid is not capable of doing.