Hot rubber crack filler/ sealant is the #1 choice when filling or sealing asphalt cracks. It remains flexible as asphalt expands and contracts due to the rise and fall in temperature. Hot rubber will reduce frost heaves in the winter and stop cracks from washing out and spreading in the rain months by forming a water tight seal over the asphalt cracks. If cracks are treated promptly, the related costs of repair can be minimized. Don’t wait until cracks become potholes.