The Foundation Of Every Coating
Concrete Grinding & Surface Preparation
Every coating is only as good as the concrete underneath it. We mechanically grind the slab, remove contaminants and old coatings, treat cracks, and check moisture conditions before any system goes down — the step that determines whether a floor bonds for the long run or starts lifting within months.
Why it matters
A coating is only as good as what it's bonded to
Most epoxy failures people call us about didn't start with a bad batch of resin — they started with a slab that was coated without being properly prepared. Concrete straight from the truck, or an old floor with paint or a failed coating still on it, doesn't give a new system anything to grip. Preparation is the step that turns raw or compromised concrete into a surface a coating can actually bond to for the long run, and it's where most of our time on a project goes before a single coat is applied.
- Garages with peeling paint or old coatings
- Slabs with visible cracks or contamination
- Any floor before a new epoxy or polyaspartic system
- Commercial slabs being recoated
What we check for
Preparation isn't one step — it's several
Mechanical, not chemical
Diamond grinding opens the concrete's pores and creates a textured profile that coatings can mechanically key into — something a chemical etch alone can't reliably produce.
Every contaminant addressed
Oil, curing compounds, old sealers, and failed coatings are removed from the slab before anything new goes down, so the new system bonds to sound concrete instead of whatever was sitting on top of it.
Checked before it's covered
Cracks get opened and treated, edges get worked by hand, and moisture conditions get checked — so problems are addressed while the slab is still visible, not after they're sealed underneath a coating.
What's actually involved
What full mechanical preparation includes
Not every job needs every step below — the scope depends on the slab's condition and what's going on top of it.
Diamond grinding
Diamond-segmented tooling grinds away the top layer of the slab and opens a mechanical texture the coating can key into — the main way we create a bondable surface.
A profile the coating needs
The industry describes ground concrete texture on a numbered profile scale, from nearly smooth to aggressively textured. Which profile a floor needs depends on the coating system going down, not a single standard for every job.
Contaminant removal
Oil, grease, curing compounds, and residue from old sealers sit on top of concrete and block adhesion. Grinding removes that layer along with the compromised concrete underneath it.
Old coating removal
Failed paint, a previous epoxy system, or a sealer that's not compatible with what's going down next gets mechanically removed rather than coated over.
Crack opening & repair
Cracks get opened wider along their length and filled with an appropriate repair material, so the crack is addressed structurally instead of just bridged by a thin coating.
Dust-extraction grinding
Grinders run with attached vacuum extraction that pulls concrete dust as it's produced, instead of leaving a fine layer of dust across the space and surrounding area.
Dust control
Grinding concrete produces a fine dust that's disruptive and unhealthy to breathe in volume. Dust-extraction grinding attaches a vacuum directly to the grinder head, so dust is captured as it's created rather than settling across the floor, walls, and anything stored nearby.
Moisture testing before coating
Concrete can move moisture vapor upward from below even when the surface looks and feels completely dry. We check moisture conditions as part of preparation on slabs where it's a relevant risk, because that result — not how the surface looks — is what determines whether a moisture-tolerant system is needed. See how we handle moisture mitigation.
A common shortcut
Why mechanical preparation, not acid etching
Acid etching
A diluted acid solution is applied to lightly roughen the top of the slab. It's inexpensive and doesn't require equipment, but it only affects the very surface of the concrete, doesn't remove contamination or old coatings, and produces an inconsistent profile that's hard to control — and hard to verify — once it's rinsed and dry.
Mechanical grinding
Diamond tooling physically removes a controlled layer of concrete, producing a consistent, verifiable profile across the whole slab, and pulling up contamination and old coatings along with it rather than working around them. It's the more reliable method for the systems we install.
What's at stake
Why improper preparation causes peeling and delamination
When a coating is applied over concrete that hasn't been properly prepared — smooth, contaminated, or still carrying a failed previous coating — it may look fine on installation day and still fail weeks or months later. Without a mechanical profile to grip, adhesion depends on a much weaker chemical bond that traffic, moisture, and time can break down. That's the root cause behind most of the peeling and delamination cases we get called out to look at.
If you're trying to understand why a floor is already lifting, our guide on why epoxy floors peel walks through the common causes in more detail, and our floor repair and recoating page covers how we evaluate a failed floor before fixing it. For the full picture of what good preparation involves before any coating goes down, see our epoxy floor preparation guide.
How it comes together
Installation, step by step
- 1
Consultation
Tell us about your space by phone, WhatsApp, or the quote form. We discuss goals, finishes, and budget expectations.
- 2
Surface evaluation
We assess the existing slab — cracks, moisture, previous coatings — because the right system starts with what's under it.
- 3
Design & finish selection
Choose your finish family and colors: metallic pigment combinations, flake blends, or a custom direction for your brand.
- 4
Preparation
Mechanical grinding, crack treatment, and cleaning create the profile the coating needs to bond permanently.
- 5
Installation
Base coats, decorative layer, and protective top coat are applied in stages, each cured before the next.
- 6
Final inspection & care guidance
We walk the finished floor with you and explain simple cleaning and care so it keeps its look.
Real installs
Floors built on properly prepared concrete
Questions
Surface preparation FAQ
Explore more
Related services
Where we install
Serving Miami-Dade, Broward & South Florida
SalasResin is a service-area business — no fixed public office, but on-site consultations and installation throughout the following cities and the areas around them.
Not sure what your slab needs?
Tell us about the floor's condition — old coatings, cracks, or a history of peeling — and we'll walk through what preparation it actually calls for.