Muriatic Acid Stain Concrete

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Muriatic acid stain concrete.

Muriatic acid is commonly recommended to clean and remove rust stains from concrete. Despite its effectiveness muriatic acid should be used on concrete stains only if you ve tried gentler alternatives to no avail. A smooth concrete floor must be roughened before paint will stick to it. With proper use it removes stains when other cleaners fail.

You roughen such a floor by etching it with muriatic acid. 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. Mix 3 to 4 parts water with 1 part acid or follow label instructions for a 10 concentration 15 for hard smooth concrete. Muriatic acid is the strongest acid available to the public.

In these products the muriatic acid is mixed with a stain color. Have tried everything including scrubbing the hell out of it. Muriatic acid acts like liquid sandpaper by roughening the surface of the concrete. These solutions are for etching the concrete.

The muriatic acid etches the concrete allowing the color to seep into the concrete. It also reduces the surface alkalinity of the concrete that can cause some paints to adhere poorly. Muriatic acid can work wonders on filthy concrete and it can also be very useful in cleaning excess smears of dried mortar and grout or when attempting to alleviate tough rust stains. If you re just removing mineral deposits efflorescence use a much weaker mix 10 1 or 16 1 for muriatic acid.

It is also the primary component in most concrete staining products. It is excellent for cleaning away rust stains and efflorescence but must be used with extreme caution. Acid etching is the process of applying hydrochloric muriatic or buffered phosphoric acid to a slab then rinsing it off with water. Muriatic acid is a strong acid cleaner used on masonry surfaces to clean stains.

Muriatic acid should never be used indoors and has to be thoroughly neutralized before disposal. If the acid comes in contact with skin wash it away with large amounts of water.