You park the car after a summer drive. Tires are warm. Maybe 130 to 150°F. The next morning, you back the car out of the garage and there are two tire-shaped patches of missing coating on the floor, stuck to the bottom of your tires.
That's hot tire pickup. It's the most photographable garage-floor failure, and it's almost entirely preventable. This is the short version of why it happens, why it's so common with home-center kits, and the one chemistry choice that ends the problem.
What's actually happening
Hot tire pickup is a thermal failure of the coating-to-substrate bond. Three things have to align for it to happen:
- The coating film is soft enough to deform under tire pressure. A 4,000-pound car concentrated on four tires puts about 35 PSI of contact pressure on each tire patch. Hard coatings (Shore D 80+) shrug it off. Soft coatings (Shore D 50 to 60) deform under it, especially when warm.
- The tire is hot enough to soften the coating's surface. Tire surface temperature after a 30-mile drive on a Texas summer day routinely hits 130 to 160°F. That heat transfers to the coating where the tire sits, softening the top layer.
- The coating-to-concrete bond is weaker than the coating-to-tire adhesion. When the tire cools, the soft coating has bonded itself to the warm rubber. As the car moves, the coating peels off the slab and stays stuck to the tire.
If any one of those three conditions fails, you don't get pickup. The trick is to make sure all three fail.
Why it happens with retail epoxy paint
Most "epoxy garage paint" kits sold at home centers fail on point 1. They're 40 to 50% solids water-based or solvent-based formulations that cure to a Shore D hardness somewhere in the 50s. That's plenty hard for foot traffic. It's not hard enough for hot tires.
The marketing often calls these products "epoxy" or "epoxy paint." Technically true: they contain epoxy resin. But the cured film is closer to a tough latex paint than to a structural floor coating. Shore D 55 versus Shore D 82 is the difference between a tire denting the surface and a tire bouncing off it.
Real 100% solids two-part epoxy cures to Shore D 80 to 85. That's the same hardness as a hockey puck. A hot tire compresses against it for 12 hours and the surface doesn't deform. The bond stays intact.
Why it sometimes happens with real epoxy
Even quality 100% solids epoxy can pick up if:
- The film is too thin. Stretching a kit over more square footage than it covers leaves a thinner-than-spec film that doesn't have the mass to resist pressure.
- The cure was incomplete when you parked. Polyaspartic reaches drive-on hardness in 24 hours at 75°F. Below 50°F, that extends to 36 to 48 hours. Parking on an under-cured floor in cold weather is a setup for pickup.
- The slab has moisture issues. A coating that's already losing its bond from below can pick up where a hot tire stresses it from above.
These are edge cases. The common case is retail-kit chemistry that simply isn't hard enough.
The one fix: polyaspartic topcoat
The reliable fix for hot tire pickup is a polyaspartic topcoat over a 100% solids epoxy base coat. Here's why this combination works:
- The base coat is hard enough. 100% solids epoxy at Shore D 82 doesn't deform under tire pressure.
- The topcoat is even harder. Polyaspartic also cures to Shore D 80 to 85, with better thermal stability than epoxy. The polyaspartic surface stays rigid even when warm tires sit on it.
- The chemistry is bonded to the substrate, not the tire. Both coats are mechanically and chemically bonded to the slab. Heat doesn't break that bond.
We have customers running daily-driver Texas garages for five-plus years on this combination with zero pickup. The chemistry is doing exactly what it's supposed to.
How to fix a floor that already has pickup
If your existing floor is showing tire-shaped patches, the fix is partial strip and recoat:
- Identify the affected zones. Usually the parking area in front of each tire. Other areas of the floor are typically still bonded.
- Strip the failing coating in those zones. Mechanical scraping plus a sander to feather the edges into the surrounding good coating.
- Vacuum and clean. Get all loose material off.
- Pour a real 100% solids epoxy patch in the stripped zones. Let it cure 24 hours.
- Topcoat the entire floor with polyaspartic. This unifies the look (the patched zones won't be visibly different from the rest of the floor) and prevents future pickup across the whole surface.
Total cost for a 400 SF garage with localized pickup: usually $300 to $500 in materials, plus a long Saturday.
How to prevent it on a new pour
If you haven't poured yet, the answer is upstream. Pick the right product before you start:
- Use 100% solids two-part epoxy as the base coat. Not paint. Not water-based "epoxy floor coating" from a home center.
- Use polyaspartic as the topcoat. Specifically a 90% solids polyaspartic, which is what we sell as RS Poly.
- Hit spec film thickness. Don't stretch a kit. If a kit covers 400 SF and your garage is 450 SF, buy two kits.
- Don't park on the new floor for 48 hours. Even if the can says drive-on at 24, give it the extra day. Especially on cold-weather pours.
How to tell if your kit will resist hot tire pickup
Read the data sheet before you buy. Three numbers matter:
| Spec | Look for | |---|---| | Solids by volume | 100% (epoxy base) and 90% (polyaspartic top) | | Shore D hardness, 24 hours | 80 or higher | | Cure profile | Walk-on at 12 hours or less, drive-on at 24 |
Anything significantly below those numbers is a soft coating that will pick up under hot tires in a hot garage. The home-center kits that fail on these specs include Rust-Oleum EpoxyShield, Quikrete Epoxy Garage Floor Coating, and most water-based kits sold at $80 to $150 per "two-car garage" pack. Real two-part 100% solids epoxy plus polyaspartic is a $500 to $700 materials package, not a $150 paint kit.
FAQ
Why doesn't polyurethane prevent hot tire pickup the same way?
It can, in principle, but most polyurethane garage coatings cure too soft (Shore D 60 to 70 range) for reliable hot-tire resistance. Polyaspartic is harder and more thermally stable, and is the standard topcoat for residential garages where pickup is a concern.
Will my polyaspartic floor pick up if I park a really hot car on it?
In normal use, no. We have not seen pickup on properly-poured polyaspartic floors in Texas garages, including from cars that have just been autocrossing in 100°F heat. The Shore D 80+ surface and the genuine UV/thermal stability of the chemistry handle hot tires reliably.
Does adding a clear sealer over my old paint kit prevent pickup?
Sometimes. A polyaspartic over a sound paint coating can prevent further pickup, but if the underlying paint is already failing, the polyaspartic peels with it. Test the existing coating first by trying to peel a corner up. If it lifts easily, strip the old paint before doing anything else.
Why does pickup mostly happen in summer?
Tire surface temperature is the biggest variable. A tire sitting on a 70°F garage floor doesn't transfer enough heat to soften most coatings. A 150°F summer tire on the same coating can. Texas summer tires after even a short drive are routinely 130°F+, which is why pickup correlates strongly with summer parking.
Can I prevent pickup by parking on rubber mats?
Yes, this works. Rubber tire mats placed under each parking spot prevent direct tire contact and largely eliminate pickup. They're an option for floors that have failed once and you don't want to repour. About $50 to $100 per pair.
Is hot tire pickup covered under most coating warranties?
Depends on the warranty. Most home-center kit warranties exclude hot tire pickup as "improper use." Polyaspartic systems from professional distributors typically warrant against pickup as long as the system was installed correctly. Read the fine print before assuming you're covered.
Bottom line
Hot tire pickup happens because retail garage paint isn't hard enough to resist hot tires pressing into it. The fix is a hard coating: 100% solids epoxy under a polyaspartic topcoat, on a properly profiled and clean slab. Once you have that combination, hot tire pickup stops being a thing your floor does.
Send us your square footage and we'll quote a real 100% solids epoxy plus polyaspartic kit, delivered within our 200-mile Texas zone.