Epoxy vs polyaspartic: which is better for your garage?

It's the most common question we get. The honest answer is that they do different jobs, and the strongest garage floors use each one where it works best.

By Josh Burnett, owner and lead installer at Coating Commander. Updated October 4, 2026. 7-minute read.

100% solids epoxy base coat being applied to a ground concrete garage floor in Kansas City
The epoxy base coat going down on diamond-ground concrete.
In this guide
  1. What epoxy does well
  2. What polyaspartic does well
  3. Side by side
  4. Why the best floors use both
  5. What Kansas City weather does to a coating
  6. What about DIY epoxy kits?
  7. Common questions

What epoxy does well

A 100% solids epoxy is a two-part resin that soaks into freshly ground concrete, fills its pores and tiny cracks, and cures into a hard, bonded layer. It's the structural foundation of a coated floor.

  • Deep bond. Epoxy grips a properly ground slab extremely well.
  • Builds thickness. It goes down at a consistent 8 to 10 mil, giving the flake something solid to sit in.
  • Fills imperfections. It levels out the small pits and texture left after grinding.

Where epoxy falls short

Epoxy isn't UV stable. Used as the top layer, it yellows in sunlight, which matters in a garage that sits with the door open all summer. It's also softer on the surface, so it scuffs and shows wear sooner than a polyaspartic finish.

What polyaspartic does well

Polyaspartic is a type of polyurea coating. It's built to be the hard-wearing surface you actually walk and drive on.

  • UV stable. No yellowing, chalking or fading in direct sun.
  • Hard and chemical resistant. It stands up to oil, brake fluid, road salt and de-icers tracked in on your tires.
  • Fast cure. You can walk on it in 8 hours and drive on it in 24.

Where polyaspartic takes skill

Polyaspartic cures quickly, which is great for you and hard on the installer. It has to be mixed and rolled with good timing and technique. That's one reason it's rarely found in DIY kits.

Want an exact price for your floor?Call or text Josh for a free on-site estimate and a same-day flat-rate quote.

Side by side

100% solids epoxyPolyaspartic
Best jobBase coat that bonds to concreteTop coat you walk and drive on
SunlightYellows over timeUV stable
Surface hardnessGoodVery high, resists scuffs
Chemicals and saltGoodExcellent
Cure timeSlowerWalk in 8 hours, drive in 24

Why the best floors use both

Instead of choosing one, our Commander System uses each material where it's strongest:

  1. Polyurea crack repair. Semi-rigid polyurea fills every routed crack. It flexes with the slab and won't re-crack through freeze-thaw.
  2. Epoxy base. 100% solids epoxy bonds deep into the diamond-ground concrete.
  3. Flake broadcast. Color flake is broadcast until the surface won't hold any more.
  4. Polyaspartic top coat. Two cross-direction passes seal it all in with a UV-stable, hard-wearing finish.

Some customers prefer a full polyaspartic system from base to top, and we install that too. Either way, it's done in one day and backed by a 15-year warranty.

What Kansas City weather does to a coating

Kansas City is tough on garage floors. Hard freeze-thaw winters push moisture into the slab, road salt and de-icers ride in on every car, and summer sun bakes anything near the door. A coating here has to hold its bond through temperature swings and resist chemicals and UV at the same time.

That's exactly the split above: a bonded base that doesn't let go, and a top coat that doesn't yellow, stain or wear through.

What about DIY epoxy kits?

Big-box kits are usually a thin, water-based epoxy rolled over concrete that's been cleaned or acid etched rather than ground. Without a real surface profile and a proper top coat, they often peel where hot tires sit within the first year or two.

If you've already tried a kit and it's failing, that's fine. We grind it off along with any other old coating and start over on bare concrete.

Common questions

What is the difference between epoxy and polyaspartic floor coating?

Epoxy is a 100% solids base coat that bonds directly to concrete and provides structural strength. Polyaspartic is a UV-stable top coat that resists fading, chemicals and abrasion. Coating Commander uses both in a layered system for maximum durability.

Does epoxy turn yellow?

Epoxy is not UV stable, so it can yellow when it is used as the top layer and exposed to sunlight. A polyaspartic top coat prevents that.

How long before I can drive on a polyaspartic floor?

You can walk on it after about 8 hours and drive on it after 24 hours.

Can you coat over my old DIY epoxy?

Old coatings are ground off first so the new system bonds to bare concrete. Coating over a failing coating just means the new one fails with it.

Which warranty comes with your system?

Coating Commander floors come with a 15-year warranty covering adhesion, peeling and delamination on properly prepped horizontal surfaces.

Want an exact price for your floor?Call or text Josh for a free on-site estimate and a same-day flat-rate quote.

Ready for a floor done right? Call or text for a free estimate

(913) 669‑6867

Josh will come out, look at your floor and give you a flat-rate price the same day. No obligation and no hard sell. Serving Kansas City, Overland Park, Olathe, Leawood, Lenexa, Lee's Summit and the whole KC metro.

[email protected] Monday to Saturday, 7am to 6pm