These types of paint require 2 days drying time at approximately 25 C before applying a second coat, or wrinkling may occur. Cool temperatures and high humidity will lengthen the drying time required. Fast drying paints applied over an insufficiently dried primer will also wrinkle. Paint left exposed, or left in vehicles in hot weather, will have to be brought back to 25 C before using. Cold paint doesn't flow well and tends to sag because of going on too thick.
Hot paint has poor coverage because it goes on too thin.
Latex paints are usually dry to touch in 1 hour and ready for a second coat after 4 hours, but it might take three weeks before all the solvents come out of the finish. The coating will not provide its best water resistance until after the sovents have evaporated. Alkalinity from damp concrete attacks the resin in alkyd paint, making it soft and sticky. For better hiding of clear-base deep colours, use a tinted primer or if applying latex on drywall, use the finish paint as a primer. It is not advisable to use more than 4 ounces of tint per gallon of paint.