What is the best garage floor coating for NB winters?

For New Brunswick garages, a 100% solids polyaspartic coating is the best overall choice, combining durability, chemical resistance, and the ability to handle NB's temperature extremes better than any other coating type. That said, a well-applied 100% solids epoxy system is a close second and costs less — making it the most popular professional choice in NB for homeowners who want excellent performance without the premium price of polyaspartic.

NB winters create a specific set of challenges for garage floor coatings that you don't face in milder climates. Every vehicle you drive in from a Fredericton or Moncton winter brings in road salt, de-icing brine, and ice melt — then that salty, acidic water puddles on your floor as the snow and slush melt. The coating needs to be:

• Chemical resistant to road salt, calcium chloride, and motor oil
• Impact resistant for dropped tools and the repeated thermal shock of hot tires on a cold floor
• UV stable if any sunlight reaches the floor (epoxy yellows with UV exposure; polyaspartic does not)
• Moisture tolerant during application, since NB basements and garages often have elevated humidity

Epoxy coatings (100% solids, not water-based) check most of these boxes. A two-coat system with a clear topcoat provides excellent chemical and abrasion resistance. The main limitations are yellowing in UV-exposed areas, longer cure times (24–72 hours between coats), and sensitivity to moisture during application — epoxy applied to concrete with elevated moisture content will peel. Professional epoxy coating for an NB two-car garage runs $1,600–$4,000 installed ($4–$8 per sq ft).

Polyaspartic coatings are newer technology and perform better in several ways: faster cure time (some systems cure in 1–4 hours), better UV resistance (no yellowing), better temperature flexibility, and better tolerance to moisture in the substrate. The trade-off is higher cost ($6–$12 per sq ft professionally applied) and a faster working time that makes application less forgiving. For garages with windows or natural light exposure, polyaspartic's UV stability is a clear advantage.

Water-based epoxy kits from hardware stores are a distant third — they look similar on the shelf but are significantly diluted. The film thickness is thin, adhesion is weaker, and durability in NB conditions is poor. They typically last 2–5 years before peeling, compared to 10–20 years for quality 100% solids systems.

One important rule for NB garage floors: Concrete must be at least 28–30 days old and tested for moisture vapour emission before coating. New concrete that cures over an NB winter retains moisture for months. Applying coating to wet concrete is the leading cause of premature delamination.

If your garage is heated in winter, either epoxy or polyaspartic works well. If your garage is unheated and temperatures swing dramatically, polyaspartic's flexibility is an advantage. New Brunswick Concrete can connect you with professional floor coating contractors in your area for quotes and surface assessment.