The simple answer is no. Trying to use a hair dryer to speed up the dryer time of paint or stain can cause it to dry unevenly. It may seem dry on the surface, but underneath, it is still wet. Applying vinyl on top of this could give you poor results and may not stick as well or as long as you’d like. You cannot speed up the drying time for sealant. If the instructions say it needs 28 days to cure, it needs 28 days to cure.