Concrete Resurfacing vs. a Floor Coating: Fixing Worn, Pitted Concrete in Michigan
Quick answer: A concrete resurfacer is a thin cement-based layer troweled or squeegeed over old concrete to give it a fresh, even surface. It improves the look, but it's still concrete, so it can absorb salt and water and show old cracks again. A professional floor coating starts by grinding and repairing the slab, then covers it with a thick, non-porous surface. For a garage or patio that faces Michigan winters, repair plus coating usually lasts longer.
Michigan concrete takes a beating. After a few winters of salt and freeze-thaw, many garages, porches and patios around Downriver are pitted, flaking and patchy. Two fixes come up again and again: resurface it, or coat it. They sound similar, but they work very differently. Here's how to choose.
What a concrete resurfacer is
A resurfacer is a thin, polymer-modified cement mix. You can find it at most hardware stores. Quikrete's data sheet for its Re-Cap resurfacer, for example, describes it as a portland cement-based product for restoring worn or scaled surfaces, applied from a feather edge up to about 1/2 inch thick (Quikrete Re-Cap data sheet).
Done well, resurfacing can:
- Even out a rough, scaled or pitted surface
- Fill shallow spalls and pockmarks
- Give the concrete a uniform gray color again
Where resurfacing falls short
It's still concrete. A resurfaced slab is porous, just like the original. Salty water can soak in, freeze and start the scaling process all over again unless it's sealed and kept sealed. Our guide to concrete sealers vs. floor coatings explains why sealers need regular renewal.
Old cracks can come back. The Quikrete data sheet notes that reflective cracking into the new surface "cannot be completely prevented," and that old cracks can reappear if the base concrete moves.
Prep and weather are demanding. The same data sheet calls for removing paint, grease and loose concrete, pressure washing, and applying only when air and surface temperatures are between 50°F and 90°F. In Michigan, that narrows the window to the warmer months.
It can't go over sealers or paint. If your floor has old paint or sealer on it, that has to come off first.
How repair plus coating works
A professional coating approaches the same damage differently. Instead of adding a thin layer of new concrete, it fixes the slab and then covers it completely.
Here's how we do it at Fortified:
- Diamond grinding. We grind the entire floor to remove the weak, flaking top layer and open the concrete so the coating can bond permanently.
- Crack and pit repair. Pits, spider cracks and chipped joints are filled and smoothed flush. Our post on coating a cracked garage floor explains how we read and repair cracks.
- Base coat and flake. A 100% solids polyurea base coat goes down, and decorative flake is broadcast across the whole floor.
- UV-stable topcoat. A polyaspartic topcoat seals everything in with a slip-resistant, easy-to-clean finish. Learn more in polyaspartic floor coatings explained.
The result is a non-porous surface. Salt, slush and oil stay on top instead of soaking into the slab, which is what started the damage in the first place.
Side-by-side
| Feature | Concrete resurfacer | Repair + professional coating |
|---|---|---|
| What it is | Thin cement-based overlay | Ground, repaired slab under a thick bonded coating |
| Surface | Porous concrete | Non-porous |
| Road salt and water | Can soak in unless sealed | Stay on top |
| Old cracks | Can reappear | Repaired before coating |
| Look | Even gray concrete | Your choice of flake color |
| Upkeep | Seal and reseal | Sweep and mop |
| Warranty | Varies by product and installer | Manufacturer lifetime UV warranty and 15-year warranty against chipping, peeling and delaminating |
When resurfacing might make sense
- A large outdoor area like a long driveway, where you want plain concrete and plan to keep it sealed
- A budget fix on a slab you plan to replace in a few years
- A surface that will later be covered with something else
When to repair and coat instead
- Garages that see road salt, slush, oil and hot tires every winter
- Porches, steps and patios you want to look finished and stay easy to clean
- Basements where you want a bright, dust-free floor (after checking moisture, as covered in our basement floor coating guide)
- Any floor where you're tired of redoing the surface every few years
When neither one is the answer
Some concrete needs more than a new surface. If sections have heaved, sunk or broken apart, the slab is moving, and anything you put on top will crack with it. Those areas need to be repaired or replaced first. A good installer will tell you this up front rather than coating over a problem.
Frequently asked questions
What's the difference between resurfacing and coating concrete?
Resurfacing adds a thin layer of new cement-based material, so the surface is still porous concrete. Coating grinds and repairs the slab, then covers it with a thick, non-porous surface that keeps salt and water out.
Can you coat over a resurfaced floor?
Often, yes, if the resurfacer is well bonded and sound. It's ground and prepared the same way as the original slab. Loose or delaminating resurfacer has to be removed first.
Will a coating fix spalled or pitted concrete?
The spalls and pits are repaired during prep, then the coating covers the whole floor, so the finished surface is smooth and even.
Do old cracks come back through a coating?
Cracks are filled and smoothed before coating. If a slab is actively moving or settling, that has to be addressed first, because no surface product can stop a slab from moving.
How long does a resurfaced surface last compared to a coating?
It depends on the product, prep and how well it's sealed. Our coatings carry a manufacturer lifetime warranty against UV fading and a 15-year warranty against chipping, peeling and delaminating.
Not sure what your concrete needs?
Joe will look at the damage, explain your options honestly, and give you a straightforward quote. Book a free in-home estimate or see our residential floor coatings.