Crack sealing has two primary purposes:
To prevent the intrusion of water through the crack into the underlying pavement structure.
To prevent extraneous materials from entering the crack and causing further deterioration as the pavement expands and contracts with temperature changes.
Crack sealing where cracks are subject to expansion and contraction is done using a specially prepared hot-poured sealant. Depending on the climate, the materials used, the pavement conditions and the technique used, crack sealing will last three to eight years.
