A gel acid will effectively etch concrete surfaces to create a concrete surface profile. Gel acid is also an effective iron remover that takes rust stains off concrete surfaces. A gel acid will not absorb into concrete surface and weaken concrete. A gel acid only reacts with the concrete surface and will not change PH level. Additional coats will add to the concrete surface roughness.

Etching Solutions

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Tek Gel for Profiling Concrete...
Tek Gel for Profiling Concrete is a medium-duty gelled acid for removing dirt, organic material, grease/oil, and to profile for thin coatings and overlay applications typically less than 10 mils...
$78.40
$78.40