How does crack filling work, and why is it done before sealing?
Cracks let water reach the base. In Oklahoma City winters that water freezes, expands and widens the crack. In summer the clay under the pavement moves and the cracks grow. Crack filling stops that cycle.
The crew cleans out debris and loose material, then fills the crack with a rubberized filler that stays flexible as the pavement moves.
- Narrow cracks are filled and leveled.
- Wide or branching cracks may need a different repair.
- Filling happens before sealcoat so water cannot sit in open cracks under the coating.
Sealing over open cracks wastes the coating, because moisture still gets under it and the damage keeps spreading.

