We use rubberized asphalt crack filler for all crack sealing, prior to seal coating. Filling cracks in your asphalt is an important step in extending the life of your asphalt. Crack filling helps prevent vegetation from growing which attract moisture under the asphalt surface. Water penetration into those “cracked areas” creates voids, soft spots, bird baths and potholes in your asphalt. The first step in the process is a thorough cleaning, prior to crack filling.