Larger screens may benefit from small amount of an extra agent called Goo Systems "Flow Release" mixed into the coatings. This will slow the drying process enough to minimize potential problems in application in very dry environments. A little Flow Release goes a very long way. One or two drops per 200mL is a good place to start. Add incrementally more if your first stroke starts to dry before the second is applied. Please ask for our advice if you are intending to execute a substantially large screen. Flow Release will dramatically slow the drying time (double it, or more) and allow for a much more perfect surfaces on large screens. It may take 3-6 hours to have a layer dry with this product in use, but the "lay" of the coatings on the surface will be noticeably more correct and you will have more time to work the surface.