Short answer: garage floor coatings list several times on the label: recoat, light foot traffic, full cure / vehicle traffic. Those times are for the label temperature (often around 70–77°F). In a colder garage they stretch, often roughly doubling for every 18°F (10°C) colder. Enter your label times and garage temperature for a planning timeline.
A label says recoat 12 h, foot traffic 24 h and vehicles 72 h at 75°F. In a 57°F garage (18°F colder), plan about 24 h, 48 h and 6 days. Warming the garage to the label temperature keeps you close to the printed times.
Hot tires can soften and lift a coating that hasn't fully cured ("hot tire pickup"). Waiting for the full vehicle-traffic time, and using a topcoat if the system calls for one, gives the coating its best chance.
Plan amounts with the garage floor calculator or 2-car garage page; see epoxy cure time by temperature.
Use the light-traffic time on your label, often about a day at the label temperature, and longer in a cold garage.
Use the vehicle-traffic or full-cure time on the label, often several days; colder garages take longer. Driving on it early risks hot-tire pickup.
Warmer temperatures speed the reaction and shorten working time; very hot conditions can make it hard to apply evenly. Stay within the label's temperature range.
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