This is one of the most common questions we get, and the short answer surprises most people: epoxy and polyaspartic are not competing options you choose between. On a properly installed floor, they work together, each doing a job the other cannot.
What Epoxy Does
Epoxy is used as the base coat and build coat. It bonds extremely well to properly prepped concrete and builds thickness, which is what gives a floor its strength and its ability to hide minor imperfections in the slab. It is also the layer that carries color and, in flake systems, holds the decorative flake chips in place.
What Polyaspartic Does
Polyaspartic, along with aliphatic urethane, is used as the topcoat. It is UV stable, meaning it will not yellow or break down in sunlight the way straight epoxy can over time. It also cures much faster than epoxy, resists scratches better, and adds the chemical and abrasion resistance that keeps a floor looking new under daily traffic.
Why Alaska Floors Need Both
Some installers try to sell an epoxy-only floor or a polyaspartic-only floor to cut costs. Both approaches leave gaps. Epoxy alone will yellow and scratch more easily over time. Polyaspartic alone, without a proper epoxy build coat, does not bond and build the same way and skips the moisture protection an epoxy base coat provides. We use both in combination on every floor: epoxy as the foundation, polyaspartic as the shield.
The Piece Most Installers Skip
Alaska's freeze-thaw cycles push moisture up through concrete slabs in a way many other climates do not deal with. That is why we install a moisture vapor barrier on every single floor, standard, not as an upsell. Skip that step and even a perfect epoxy-polyaspartic combination can fail from underneath.