Diamond Prep Process, Polishing Steps, and Care

Before any grinding, we assess the slab for moisture, identify the contaminants — old sealer, oil, adhesive, laitance — and determine what the surface needs. A slab getting a coating needs a preparation profile; a slab getting a polish needs a progressive refinement. The assessment tells us what the slab needs before we quote the prep — because a prep that's quoted without assessing the slab is a prep that's quoted blind.

We also assess the slab's soundness. A slab with soft spots or hidden cracks may need repair before the prep, and a slab with structural failure may not be a candidate for a polish. We tell you honestly what the slab needs, because we don't sell prep that doesn't last.

The first grind is coarse — it removes the laitance, the contaminants, and the old sealer or coating. The coarse diamonds cut the surface to sound concrete, revealing the slab's true condition. This is the step that removes what would prevent the coating from bonding, and it's the step that's most often skipped by a prep that doesn't last.

The coarse grind is dust-controlled — the grinder has a vacuum attachment that captures the dust at the source. The preparation is not a dusty mess; it's a controlled process that keeps the slab clean and the air clear. See our existing coating removal for the removal step that may come first if a thick old coating has to come off.

For a preparation, the second grind creates the profile — the microscopic roughness that the coating locks onto. The grit is matched to the coating system — an aggressive profile for a thick coating, a smoother profile for a thinner one. The profile is what makes the coating bond, and the grinding is what creates the profile.

For a polishing, the second grind begins the refinement — progressively finer diamonds refine the surface from the coarse grind toward the final polish. The polishing uses multiple grits, each one finer than the last, until the surface reaches the desired gloss. The polishing is a separate process from the preparation, and we keep them distinct.

Cracks and spalls are repaired after the coarse grind, when the slab's true condition is visible. See our concrete crack and hole repair for the repair scope. The repair is leveled to the surrounding slab, and the surface is ready for the coating or the next step of the polish. The repair and the prep together create the sound, profiled surface the coating bonds to.

A prepared surface gets the coating's care routine — sweep, mop with a neutral cleaner, clean spills promptly. The preparation itself doesn't need separate care; it's the substrate, and the coating protects it. See our coated floor renovation and maintenance for the coating's care scope.

A polished floor has its own care routine — sweep or dust-mop regularly, mop with a neutral cleaner or a polished-floor maintenance product, and avoid acidic or abrasive cleaners that can etch the polish. A polished floor can be re-polished when the gloss dulls, and a densifier applied during the polishing helps the surface resist wear. We can set a maintenance schedule based on the traffic so the next re-polish is planned, not reactive.