Polyaspartic Garage Coatings in St. Louis, MO

Polyaspartic garage coatings are the system we reach for in St. Louis when a homeowner wants the garage back fast or the floor gets real sunlight. In chemical terms, any polyaspartic floor coating is an aliphatic polyurea. Its coats go on thinner than epoxy, it cures far quicker and it keeps its color under sunlight. HomeGuide gives polyaspartic a full cure of 1 to 2 days and heavy vehicle traffic at 24 to 48 hours, while epoxy can need as long as a week.

Sunlight through the door

People do not think of St. Louis as a sunny-floor city, but a west-facing garage with the door open on a summer evening gets direct sun across the first several feet of floor. Wikipedia lists a July mean daily high of 89.6 F, and those long, hot afternoons are when a standard epoxy floor starts to yellow. HomeGuide gives polyaspartic an excellent UV rating, while epoxy gets poor to fair. A polyaspartic floor, or a polyaspartic topcoat over an epoxy base, keeps that strip by the door the same color as the rest of the garage.

Salt and hot tires

In winter, the same garage takes salt brine off the car. MoDOT reports over 30,000 tons of salt on hand for the St. Louis region and more than 200 trucks spreading brine and rock salt on state roads. Polyaspartic forms a hard, chemical-resistant surface that keeps that brine from reaching the concrete. In July, hot tires that have just come off the highway can soften weak coatings and pull them up, a problem called hot tire pickup. A well-bonded polyaspartic system over ground concrete resists that.

Wider install windows

Polyaspartic can be applied in a wider temperature range than most epoxies, which helps in early spring and late fall when slabs are cool. It still needs the slab to be above the dew point, and the air here often runs humid: Wikipedia lists average relative humidity at 69.7% for the city. We measure air temperature, humidity, dew point and slab temperature before each coat. Because polyaspartic cures fast, we also mix in smaller batches and work in sections so every pass goes down evenly.

What polyaspartic does not do

Polyaspartic coats are thin. Per HomeGuide, a polyaspartic coat runs 2 to 6 mils thick against 10 to 20 mils for epoxy, so polyaspartic does not fill pits or level a rough slab the way a thick epoxy base can. On older St. Louis garage floors with salt spalling or heavy wear, we usually repair the surface and use a thicker base before the polyaspartic layers. It also costs more per foot. HomeGuide's range is $5 to $12 per square foot against $4 to $10 for epoxy. Bob Vila advises against polyaspartic as a DIY project, since it sets so quickly that rolling it out takes practice.

Common systems we install

The most popular choice is a one- or two-day flake floor: a polyaspartic or polyurea base coat, full vinyl chip broadcast and a clear polyaspartic topcoat. For a solid color, we use pigmented polyaspartic coats with anti-slip texture. For homeowners who want epoxy's thickness and polyaspartic's sun resistance, we pair an epoxy base with polyaspartic on top. We explain which fits your floor and budget at the estimate.

Who it suits

Polyaspartic is a strong fit if you need to park again quickly, if your garage gets afternoon sun, if you want a floor that keeps its color for many years, or if the job falls in cooler shoulder-season weather. HomeGuide lists a lifespan of 10 to 20+ years. If your slab has moisture problems, we test it first, because a fast-curing coating does not change what is coming up from below. Get a free estimate