Concrete sealing cost in Eastern Idaho runs about $1.25 to $3.00 per square foot in 2026 for a professionally applied penetrating sealer, including surface prep. A typical 600-square-foot two-car driveway lands between $750 and $1,800. Decorative work that needs a film-forming sealer to hold its color costs more, and a grind-and-seal or thin-film system runs $3 to $4 per square foot.
I run Skinner Customs out of Rigby. We pour flatwork across Jefferson, Bonneville, and Madison counties, and sealing is the cheapest thing on my price list that actually changes how long a slab lasts. It is also the service I most often talk people out of, because on the wrong slab it is money burned.
What sealing costs by size
| Area | Square footage | Penetrating sealer | Decorative / film-forming |
|---|---|---|---|
| Sidewalk or entry | 150 sq ft | $190 – $450 | $300 – $600 |
| Single driveway | 400 sq ft | $500 – $1,200 | $800 – $1,600 |
| Two-car driveway | 600 sq ft | $750 – $1,800 | $1,200 – $2,400 |
| Driveway + walkway | 900 sq ft | $1,125 – $2,700 | $1,800 – $3,600 |
| Large drive / RV pad | 1,500 sq ft | $1,875 – $4,500 | $3,000 – $6,000 |
The spread inside each row is prep, not product. A slab that has been power-washed clean and has no oil staining sits at the bottom of the range. A slab with tire marks, oil, efflorescence, or an old failing sealer that has to come off first sits at the top, because stripping a failed film-forming sealer is genuinely more work than the sealing itself.
These are regional installed ranges consistent with what Idaho coating contractors publish and what national cost data shows for the same work. We quote a specific number after we walk the slab, because prep is the whole variable.
Why the number is small and the payoff is not
Put it against the alternative. A concrete driveway replacement in Rigby runs $8 to $13 per square foot installed. On a 600-square-foot driveway that is $4,800 to $7,800. Sealing that same driveway every three years at $1,200 a cycle costs you roughly $400 a year to defer a five-figure replacement.
That math only works if the slab underneath is sound. Sealing is protection, not repair.
How often to reseal in this climate
The generic answer everywhere else is every two to three years. In Eastern Idaho I split it:
Every 2 to 3 years — driveways, patios, and walkways with a penetrating sealer and normal exposure. This is the standard interval for a silane-siloxane penetrating sealer in a freeze-thaw climate.
Every year — any surface that gets direct de-icing salt. That means the apron where the county road meets your driveway, and anywhere you park a vehicle that drips road slush. Salt exposure roughly doubles the wear rate on the sealer.
Every 1 to 2 years — decorative, stamped, and colored work with a film-forming sealer. The film is what makes the color pop, and film wears faster than penetration. If your stamped patio has gone flat and chalky, that is the sealer, not the color.
Once, at 30 days — new concrete. Fresh concrete should cure roughly a month before its first seal. Sealing too early traps water in a slab that is still giving off moisture.
A simple field test: pour a cup of water on the slab. If it beads, the sealer is working. If it soaks in and darkens the concrete within a minute, you are due.
When sealing is a waste of money
I will tell you this before I quote it.
The slab is settling or heaving. Sealer does not fix subgrade. If one section has dropped and there is a lip at the joint, you have a base problem, and sealing it just makes a smoother version of the same problem.
It is cracked through in multiple places. Structural cracks mean the slab has already failed. Fill them, but do not spend on a full seal job you will tear out in two years.
The surface is already scaling badly. Once the paste has flaked off and the sand is exposed, a sealer has nothing dense to penetrate into. That slab needs an overlay or replacement, not a coat of sealer.
It was poured without air entrainment. If the mix was wrong, sealing buys time but the surface will keep coming apart from the inside. This is the case where I will tell you to plan for replacement and seal only to stretch the timeline.
It is an interior slab under a coating. If you are putting down epoxy or polyaspartic, do not seal first. A penetrating sealer is exactly what stops a coating from bonding.
Timing matters more than most people think
Sealer needs surface temperatures consistently above roughly 50 degrees and enough of a window for the product to cure without freezing. That is a real constraint here. Rigby carries a 50 percent chance of hitting 32 degrees by around September 20, and Idaho Falls runs a little earlier. In practice our reliable sealing window closes in the first half of October.
The slab also has to be genuinely dry — usually 24 to 48 hours after the last rain, longer if it has been sitting in shade. Sealing a damp slab traps the moisture you were trying to keep out.
Early September is close to ideal: the slab has been drying all summer, surface temps are still comfortably in range, and you are ahead of the first freeze rather than chasing it.
DIY versus hiring it out
Sealing is one of the few concrete jobs a homeowner can genuinely do. Material runs roughly $0.20 to $0.60 per square foot at a big-box store, so the product on a 600-square-foot driveway is $120 to $360.
Where DIY goes wrong is always the same three places. Prep — a slab that is not properly cleaned seals dirt to the concrete. Product choice — the shelf at the hardware store is heavy on film-forming acrylics that look great for a season and then peel and cloud. And application rate — most failures are from putting it on too thick, which leaves a sticky, blotchy surface that has to be stripped.
If it is a plain grey driveway and you are willing to read the data sheet, do it yourself. If it is stamped, colored, or has an existing sealer that needs to come off, hire it. Stripping a botched sealer costs more than the original job would have.
Frequently asked questions
How much does it cost to seal a 600 square foot driveway in Idaho Falls? Roughly $750 to $1,800 with a penetrating sealer, depending on how much prep the slab needs. Add roughly 35 to 60 percent if it is stamped or colored and requires a film-forming product.
How long does concrete sealer last? Two to three years for a penetrating silane-siloxane in this climate. One year on surfaces that see direct de-icing salt. One to two years for film-forming sealers on decorative work.
Can I seal concrete in the fall? Yes, and early fall is one of the two best windows of the year here. You need surface temps consistently above about 50 degrees and no freeze during the cure. In Eastern Idaho that generally means finishing by early to mid October.
Should I seal a brand new driveway? Yes, after about 30 days of cure. And keep every de-icing chemical off it through its first full winter — use sand for traction instead.
Does sealing make concrete slippery? Film-forming sealers can, especially on a smooth finish. Penetrating sealers do not change surface texture at all. If you are sealing a decorative surface with a film, ask for a slip-resistant additive in the topcoat.
Is sealing worth it on a patio that never sees salt? For plain grey concrete under cover, it is optional. For stamped or colored work, yes — the sealer is what keeps the color from fading and the surface from absorbing stains.
Get a number for your slab
Send a couple of photos and the rough dimensions and I will tell you what sealing your slab costs, what interval it needs, and whether it is worth doing at all. If the honest answer is that your driveway needs replacing rather than sealing, I would rather say so now than take the money.
Need concrete work in Eastern Idaho? Call Zach at Skinner Customs — (208) 390-5794 — or start at skinner-customs.com
Content produced in partnership with S4 Media, marketing partner of SwagerBuilds LLC.
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