Curing in a hot garage
In a Temecula garage the heat shortens epoxy's working time, so we mix in smaller batches and spread in the cooler part of the day, usually the morning, with the garage door managed to keep sun off the floor. Temecula has a hot semi-arid climate with hot, dry weather from July to September, and a closed west-facing garage holds that heat into the evening.
Curing is a chemical reaction, and it speeds up as temperature rises, which leaves less time to roll the base coat and broadcast flake before the material stiffens. Product data sheets set an ambient temperature window for application, a minimum floor temperature through the cure, and a rule that the slab surface stays above the dew point. We read the floor and air temperature before mixing, not just the forecast.
Ventilation matters too. Epoxy can cause skin irritation and allergic reactions, and breathing vapour or sanding dust from compounds that are not fully cured can cause respiratory problems, so the garage is aired out and kept closed to kids and pets while it cures. When you can walk on the floor and when the car can come back in are both set by the product data sheet and written on your estimate.