Watching my neighbor seal his driveway in full July sun taught me more than any tutorial
Saw him out there last Saturday around 2pm with a 5 gallon bucket and a squeegee. By Tuesday the whole thing was peeling up in sheets like a bad sunburn. I asked him what happened and he said the jug literally told him not to apply above 85 degrees. It was 94 that day. I'd been doing mine in the evening for years and never thought twice about it, but seeing his mess made me go read my own label. Turns out the stuff I use wants 50 to 80 degrees and no rain for 24 hours. He's looking at a full redo now. So what time of day do you all lay yours down, early morning or after dinner?
Reading the label is only half of it, because the surface temp matters way more than the air. My concrete hit 118 on the gun at 2pm one day when the air was only 88, so an evening pour after it's had time to cool off is the safest call. Morning works too, but you want the dew gone first or the sealer will trap the wet and turn cloudy.