If you park directly on top of QPR® 50lb 6690 Hot-Applied Crack Sealant with hot tires after a prolonged drive at highway speeds may cause the crack filler to pull up. Hot tires can re-heat the crack filler, causing it to adhere to the tire when it cools. A small portion of the hot pour crack filler is pulled up with the tire when the vehicle is later moved. It is best to not park on the crack filler when the tires are hot.