Evaluate whether a slab patch/repair material is compatible with a planned polishing scope before repair work begins

Steps

1. Confirm the repair material (cementitious patch, epoxy mortar, polymer-modified patch) is compatible with mechanical grinding and, if applicable, with the planned densifier/dye chemistry, since polymer-modified or epoxy patches can grind, densify, or accept dye very differently than the surrounding native concrete.
2. Expect and disclose to the owner that repaired areas commonly show visible color/texture differences after polishing compared to surrounding original concrete, even with a well-matched patch material, due to differing aggregate exposure and paste characteristics.
3. Sequence patching before the main grinding passes wherever possible so the repaired area is ground, densified, and polished along with the rest of the floor rather than isolated as a later step that will not blend in.
4. For structural cracks or larger repairs, coordinate the repair method with a structural/engineering evaluation rather than treating it purely as cosmetic polishing prep.
5. Test the specific patch product with the specific planned densifier/dye system on a sample area before committing to full-floor repair-and-polish, since compatibility varies by manufacturer combination.