Garage floor coatings are one of the most-marketed, least-understood upgrades a homeowner can buy. Search for advice and you'll find strong opinions pushing epoxy, polyaspartic, or interlocking tiles as the obvious winner. The truth is none of them is universally "best" — the right choice depends entirely on your slab, your climate, and how you actually use the space. Here are three myths worth clearing up before you spend a dollar.
Myth 1: Epoxy is always the top choice
Epoxy gets recommended constantly because it's affordable and glossy in photos. What often gets left out: epoxy is sensitive to heat. If you park a vehicle that's been driven hard — hot tires straight off the highway — the heat can soften the coating enough for tires to leave a permanent imprint or even lift the finish over time. Polyaspartic coatings cure harder, resist hot-tire pickup better, and finish in about a day instead of a week. If you're storing a daily driver that comes home with warm tires, that difference matters more than the price gap.
Myth 2: A coated floor doesn't need much prep
This is the myth that causes the most regret. Coating durability comes down to what happens before the coating goes on, not the product itself. A concrete slab needs to be mechanically ground or acid-etched to open its pores, and it needs to be tested for excess moisture rising up from underneath. Skip this step and the coating can peel or bubble within a year — often in sheets, not small chips. If you're hiring a contractor, ask directly what prep process they use and whether they test for moisture. If the answer is vague, get another quote.
Myth 3: Interlocking tiles are just a cheap stopgap
Tiles get dismissed as the budget option, but for the right garage they're the smarter long-term choice. They don't require slab prep, they flex instead of cracking with minor foundation movement, and if one section gets stained by oil or chemicals, you pop it out and replace it instead of redoing the whole floor. For garages with known moisture issues, or where the floor takes real abuse from tools and chemicals, tiles often outperform a coating.
The test to run before you decide
Before you get a quote or buy a kit, spend one night finding out what your slab is actually doing. Tape an 18-inch square of clear plastic sheeting flat to the floor, sealing all four edges completely. Leave it overnight. In the morning, check the underside: if you see condensation or the concrete underneath has visibly darkened, your slab has a moisture problem that rules out standard epoxy and points you toward polyaspartic or tiles instead.
That one test, done tonight, saves you from the most common and most expensive floor coating mistake: choosing a finish based on a video you watched instead of the concrete you actually have. A floor that fits how you use your garage is what makes everything else in it — the tools, the systems, the daily routine — work the way it's supposed to.