Epoxy vs. polyaspartic: which is right for a Boise garage?
Both seal and protect your slab, but they behave very differently — especially under high-desert temperature swings, dry UV, and cold, salty winters. Here’s how they compare on the things that matter for a Boise garage.
Cure, UV, durability, and cost
- Cure time: epoxy takes 12–16+ hours per coat and days to fully harden; polyaspartic cures in about an hour and is usually walk-on the same day.
- UV stability: polyaspartic is UV-stable and won’t yellow; standard epoxy can amber over time in sunlight.
- Durability & lifespan: epoxy typically lasts 5–10 years; a polyaspartic-grade system commonly lasts 15–20+ years and flexes over slab movement instead of cracking.
- Cost: epoxy runs a few dollars less per square foot up front; polyaspartic costs more initially but usually wins on cost-per-year. See typical Boise ranges on our pricing page.
The Boise verdict
The Treasure Valley swings hard between seasons. Dry, UV-intense high-desert summers give way to cold, salty winters, and that back-and-forth cracks and fades coatings that weren’t built for the range. A Boise floor has to handle both ends — summer sun and winter freeze-thaw and salt — to actually last. The area’s fast growth means lots of newer pours alongside older slabs that have never been prepped, and both need a finish rated for the Valley’s full temperature swing rather than one season of it.
For most Boise garages, a polyaspartic-grade system is the better long-term call — it stands up to high-desert temperature swings, dry UV, and cold, salty winters where a basic epoxy kit gives out. We still spec epoxy where it’s the right fit and budget; the point is matching the system to your slab and how you use it, not selling one answer.
Talk to a Boise floor crew — free.
Questions about your slab, timing, or budget? We’ll walk it with you and put a fixed price in writing.