products can become real tricky in cold weather. some will make you want to toss them in the trash and some are not effected. I detailed a car this weekend in 38 degree weather. it was a new car prep, and I spot corrected a couple scratch's (btw I was amazed that I could cut and finish in 1 step with FG400 and a coarse hydro tech cutting pad!!!) and I wanted to use a dedicated paint cleaner, then sealant. well turns out I had to scratch that idea. The paint cleaner became near impossible to remove from the surface. (pinnacle) Normally this product is a breeze to use, but not in the cold. So after one panel I had to test a few products and the sealants would not wipe off cleanly either. after about 5 different trials I had to settle on using Poli-Seal followed up with 4* spray wax. fortunately they are both fantastic products. Poli seal especially worked perfectly. It really just depends on the conditions. Usually spray on products and polish's are negatively effected by the cold. more so than high heat and humidity.