Many acid etching projects are carried out to prepare a concrete floor for the application of a synthetic epoxy or sealant.
Acid etching concrete for epoxy.
Acid etching attacks the portland cement.
The portland cement is the glue that is holding your concrete together.
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.
These concentrated solutions use a mild acid typically phosphoric to lightly etch the surface for your new epoxy coating.
It is necessary before you acid etch concrete to remove most typical type of contamination like oil grease paint mastic and a host of other things first.
When etching a concrete garage or floor it is best to not use aggressive acids like hydrochloric or muriatic but a milder concentrated acid solution that produces a light etch.
This is usually considered a concrete preparation step prior to the application of an epoxy floor paint garage epoxy.
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.