Sealing concrete before Ohio Valley freeze-thaw season blocks water and road salt from the pores that freeze and spall the surface. The concrete must be clean and fully dry first, and sealing is a separate step from the wash.
Why freeze-thaw damages concrete
Water that sits in unsealed concrete pores freezes, expands, and spalls the surface. Road salt accelerates the damage. A sealer fills the pores so water and salt cannot get in.
Clean and dry first
A sealer traps anything on the surface, so the concrete must be washed first and fully dry before sealing. Sealing over dirt or moisture makes the sealer fail.
Penetrating vs film-forming
Penetrating sealers soak in and repel water without changing the look; film-forming sealers leave a coating (matte or glossy) that resists oil and stains more aggressively. We match the sealer to the surface and the look you want.
Five-minute self-check
- Pour a little water on the concrete — if it soaks in and darkens, it is unsealed.
- Check for surface scaling or flaking from past freeze-thaw.
- Note whether it has been more than 2–3 years since the last seal.
- Confirm the concrete can be clean and dry before sealing.
- Schedule before hard freezes arrive.
Related reading
See our concrete sealing and driveway cleaning pages, and our post on rust stains.