Diamond Grinding vs Acid Etching
Diamond grinding mechanically opens the concrete surface for coating adhesion. Acid etching chemically roughens the surface. Grinding is the standard for real coating systems.
Key points
- Diamond grinding: consistent profile, industry standard
- Acid etching: uneven results, environmental and residue issues
- Grinding required on power-troweled concrete common in garages
Frequently asked
Is acid etching ever OK?
For light-duty sealer applications on rough concrete, occasionally. For real coating systems, no.
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