Resources
Epoxy vs. polyurea & polyaspartic: which garage floor coating is better?
If you are comparing quotes, the chemistry matters more than the price per square foot. Here is the honest difference, and why Comer & Cross doesn’t install epoxy.
What is epoxy?
Epoxy is a two-part thermoset resin that has been used on garage floors for decades. It is inexpensive, widely available in DIY kits, and cures hard. Its weaknesses are the same hardness that makes it rigid and brittle, a slow 3–7 day cure, poor UV resistance (it yellows and chalks in sunlight), and a tendency to lift under hot tires (“hot-tire pickup”) because the bond softens with heat.
What are polyurea and polyaspartic?
Polyurea is a flexible elastomer, the same family of chemistry used for truck-bed liners. As a basecoat it bonds to diamond-ground concrete and flexes with it through freeze-thaw. Polyaspartic is a UV-stable aliphatic polyurea used as the clear topcoat: it cures in hours, resists chemicals and abrasion, and won’t yellow, which is why it can be used outdoors on patios and driveways.
Head to head
Epoxy vs. polyurea / polyaspartic
| Epoxy | Polyurea / polyaspartic | |
|---|---|---|
| Strength | Hard but brittle | Up to 4× stronger, flexible |
| Cure time | 3–7 days | Hours (1-day install) |
| UV resistance | Yellows and chalks | UV-stable, no yellowing |
| Hot-tire pickup | Common | Resistant |
| Freeze-thaw | Cracks with slab | Flexes with slab |
| Outdoor use | Not recommended | Patios, driveways |
| Typical lifespan | 1–7 years | 15+ years |
| Warranty | Often 1–2 years | 15-year warranty |
Watch
Polyaspartic vs. epoxy in 90 seconds
The bottom line
Why we only install polyurea / polyaspartic
Epoxy is cheaper up front because it is a cheaper product applied with less prep. Over ten years, most epoxy floors are re-done two or three times, or torn out. Our system costs more than a kit and about the same as a quality contractor epoxy, installs in one day instead of a week, and is the last coating your floor will need. That is why we can put a 15-year warranty in writing.
Comparison FAQs
Common questions
Can you coat over my old epoxy?
Only if it is fully bonded, and it rarely is. We typically grind failing epoxy off completely so the polyurea bonds to concrete, not to a layer that is about to let go.
Is polyaspartic the same as “polyurea”?
Polyaspartic is a type of polyurea. We use a polyurea basecoat for flexibility and adhesion, and a polyaspartic topcoat for UV stability and chemical resistance.
Why is polyurea more expensive than epoxy?
The materials cost more and require trained installers because of the fast cure. You are paying for a floor that lasts 15+ years instead of 3.
See what your floor would cost
Book a free estimate. We measure, check the concrete, bring color samples and leave a written quote. Current offer: Up to 50% OFF install + 15-year warranty.
No obligation · Safe, secure and confidential · Backed by our 15-year warranty