Click here to go to the site.
For Concrete polymer-modified overlays: Contractors
and manufacturers are split between roughening the concrete by
mechanical profiling or acid etching. Large or difficult surfaces
will usually be mechanically profiled.
Acid etching can provide adequate surface preparation for
horizontal installations of coatings, and toppings in areas that
are well ventilated and require a sparkand/ or dust free
environment.
But they will not remove petroleum-based products or animal
vegetable oils from the concrete.
After acid etching is done- the surface must be neutralized.
Bonding problems can occur if acidic residue remains on the
concrete.
For
Floor Coatings in Industrial or Commercial
Applications:
"Mechanical profiling is the method of choice." Thomas Kline of
Structural Preservation
William Perenchio of Wiss, Janney, Elstner Associates, Inc. notes
that "acid etching should only be done when no alternative means of
preparation is possible."