Epoxy vs polyaspartic garage floor coating — which is better for NB?

For New Brunswick conditions, polyaspartic has technical advantages over epoxy — but a properly installed 100% solids epoxy system is an excellent choice for most NB homeowners and costs 20–40% less. The right answer depends on your garage, your budget, and how the space is used.

Here's an honest side-by-side breakdown for NB conditions:

UV stability: Polyaspartic wins clearly. Standard epoxy yellows when exposed to UV light, which matters if your garage gets sunlight through windows or an open door. If your garage is interior-facing with no direct sun, this is less of a concern. Polyaspartic maintains its colour and gloss for years.

Temperature tolerance: Polyaspartic wins again. NB garages swing from -30°C in January to +35°C in July. Polyaspartic coatings have better flexibility across that range, which reduces microcracking in the coating layer over time. Standard epoxy becomes brittle at extreme cold temperatures.

Cure time: Polyaspartic is dramatically faster — some systems are dry to foot traffic in 2–4 hours and return to vehicle traffic in 24 hours. Epoxy typically requires 12–24 hours between coats and 72 hours before vehicle traffic. For homeowners who can't lose their garage for multiple days, polyaspartic's one-day installation is a real advantage.

Chemical resistance: Both resist road salt, motor oil, and de-icing chemicals well when applied at proper film thickness. High-solids epoxy and polyaspartic are comparable here for NB winter conditions.

Cost: Epoxy is less expensive. Professional epoxy coating for a two-car NB garage runs $1,600–$4,000 ($4–$8 per sq ft). Professional polyaspartic runs $2,500–$5,500 ($6–$12 per sq ft). DIY epoxy kits from building supply stores run $200–$600 for a two-car garage — though these water-based kits perform poorly in NB conditions and aren't truly comparable.

Working time: Polyaspartic has a faster pot life, meaning there's less time to work with it after mixing. Professional applicators handle this easily, but it's part of why polyaspartic installations are best left to experienced contractors.

Moisture sensitivity: Both require dry, properly prepared concrete. Concrete with elevated moisture vapour emission will cause either coating to delaminate. This is particularly important in NB garages where the floor may have higher moisture levels from snowmelt and ground moisture, especially in spring.

The honest recommendation: For most NB homeowners with an attached, unheated, or lightly heated garage, 100% solids epoxy with a polyaspartic topcoat is a great middle-ground — you get epoxy's cost efficiency with the UV stability and abrasion resistance of a polyaspartic topcoat. Many professional NB contractors use this hybrid approach.

If you have an unheated detached garage with significant temperature swings and sun exposure, full polyaspartic is worth the premium. New Brunswick Concrete can match you with local floor coating professionals who can recommend the right system after seeing your garage.