Crack sealing is the process of applying a sealant to asphalt to prevent further water intrusion and, thus, damage. Crack filling, on the other hand, is the process of putting fillers in a crack to prevent water intrusion while ensuring reinforcement on the road.
However, the time that such products take to dry varies, depending on the solutions used. Some crack fillers may take days to dry, while some crack sealers can be driven on right away.