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Decorative Concrete Questions and answers by the Pros

Question:
saf-t: How soon can we "neutrilize concrete" with acid wash, after the
concrete has been poured...?
and how soon after a concrete pour can we apply an acrylic prime coat
for decorating concrete with polomers    


Answer:
Tech-101: Saf-t, - Decorative Concrete, especially stamped or natural stone
textured concrete should be done while the concrete is being poured, not "after
the fact" Pouring concrete and then coming back another day to apply polymer
textures is like putting tooth paste on your brush After you've brushed your
teeth!. Overlays are designed to be installed over older concrete...a less
expensive alternative than ripping it all out and starting over.

In your case it sounds like you've already got fresh concrete so now you must
wait 28 days for the concrete to cure and hydrate completely for the over-lay
primer to bond. Use a high strength premium water based co-polymer which will
reduce permeability.  Primers are not meant to be applied to non-cured
surfaces. A water based co-primer would be best for your situation because of
its re-emulsifying  properties.  Hopefully the new slab of concrete has a
moisture barrier of minimum .006 mil visqueen to prevent hydrostatic build-up
which can alleviate the polymer veneer from delaminating.......good luck!
(next time try
casting, coloring and texturing  the decorative concrete in place)


Question answered in:  1 hour 07 minutes           
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