Usually yes — and the case is stronger here than in gentler climates. Missouri concrete lives through freeze-thaw winters, iron-heavy well water and hot summers, and a sealed slab resists all three. The prerequisite is a properly clean surface, which is why sealing pairs naturally with driveway cleaning.
What a sealer actually does
Concrete’s pore structure absorbs whatever lands on it — water, oil, rust-bearing irrigation, leaf tannins. A penetrating sealer fills and coats those pores so contaminants stay at the surface, where rain and routine cleaning can deal with them.
The freeze-thaw benefit is the structural one: water that penetrates concrete and freezes expands, and repeated cycles cause the surface spalling and pitting you see on older unsealed slabs. Less water in, less damage done.
What it costs you to skip it
Every stain conversation gets harder on unsealed concrete. Oil goes deep, rust precipitates into the pores, organic staining bonds — and each cleaning works against absorption that a sealer would have prevented.
Unsealed concrete also simply looks tired sooner. The grey film that builds between cleanings is partly contaminants lodged in open pores.
Timing and honesty
Sealing goes on clean, dry concrete — which means cleaning first is not optional, and a dry-weather window matters. Right after a professional clean is the efficient moment, since the surface preparation is already paid for.
Expect to re-seal periodically rather than once forever; penetrating sealers wear with traffic and weather. And pavers get a bonus: sealer stabilises joint sand, which suppresses weeds and stops the sand washing out in storms.
Having the driveway cleaned anyway? Ask us to quote sealing on the same visit — the prep is already done. Read more about driveway cleaning →