05/15/14, 06:19 PM
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Join Date: Dec 2008
Location: north Alabama
Posts: 10,814
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"
As described in an earlier blog article, a clean concrete surface is a critical factor to ensuring that your garage floor coating can bond properly. When coatings are applied to concrete floors, the surface must be clean, free of contaminants and abraded to obtain maximum adhesion. For many new garage floors or light-duty coating installations, simply cleaning the concrete with a detergent and scrubbing the surface with a bristle may be an appropriate enough to prepare the surface for a coatingFor heavy deposits of contaminants or laitance, more aggressive methods, such as acid etching have become a fairly popular method used to remove laitance, grease, oil, and other penetrating contaminants.
The latter technique involves applying a solution of an acid solution diluted in water and applied directly to the concrete. Since concrete is alkaline, a reaction takes places, in the vigorous formation and release of gas bubbles, when the strong acid solution comes into contact the alkaline cement. The residue is then rinsed with fresh water. When done properly the concrete surface will have a texture similar to sandpaper."
Any stain or dirt that now gets on the surface may be harder to remove.
Source: http://www.vaultgarage.com/btug/stan...ching-concrete
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