Epoxy vs. Polyaspartic Garage Floors: Which One Should You Get?
By Santa Monica Epoxy Flooring · Updated · 2 min read
See more: Polyaspartic & outdoor ›You usually want both. Epoxy bonds hard to concrete and builds thickness, so it makes a good basecoat. Polyaspartic is UV-stable, cures fast and stands up to hot tires, so it makes a good topcoat. A flake floor with an epoxy or polyaspartic base and a polyaspartic top costs $6.50–$10 per sq ft installed.
Where epoxy is strong
- Deep bond into diamond-ground concrete
- Builds thickness in one coat
- Moisture-tolerant versions can block vapor coming up through the slab
- Cheaper per gallon
Where it is weak: it ambers in sunlight, and it scratches more easily than polyaspartic. An epoxy-only garage floor next to an open door will yellow.
Where polyaspartic is strong
- Will not yellow in sun
- Cures in hours, so a garage can be done in one day
- Harder surface, better against scratches and hot-tire pickup
- Works in a wider temperature range
Where it is weak: it cures so fast that it needs an experienced crew, and it is more expensive per gallon.
How we combine them
On a damp slab, epoxy goes down first as a moisture vapor barrier. On a dry slab that gets sun, we may use pigmented polyaspartic as the base. Either way, the topcoat is polyaspartic. That combination is what makes a one-day flake floor possible.
What about polyurea?
Polyurea is a close cousin of polyaspartic. Some companies call their whole system polyurea. Ask what the basecoat and topcoat actually are, and whether the floor is ground first. That matters more than the label.
Cost difference
Because we use both in every flake build, the price difference is in the layer count, not the chemistry: $6.50 per sq ft for a 3-layer floor up to $10 for a 5-layer build with its own moisture barrier.
Frequently Asked Questions
Is polyaspartic better than epoxy?
For a topcoat, yes: it is UV-stable and more abrasion-resistant. For a basecoat on damp concrete, a moisture-tolerant epoxy is often the better choice. Good floors use both.
Does polyaspartic yellow?
No. Aliphatic polyaspartic is UV-stable, which is why we use it anywhere sun reaches the floor.
Can a polyaspartic floor be done in one day?
Yes. Grinding, repairs, basecoat, flake and topcoat all happen in one working day on a typical two-car garage.