Sealing a concrete patio or front porch typically runs $2 to $4 per square foot with a quality penetrating sealer. A 300 sqft patio usually lands in the $600 to $1,200 range. That's very different from garage floor coating pricing, and there's a reason.
I get calls every spring from folks who want "that garage floor look" on their patio. I'll talk most of them out of it. Here's why, and here's what makes sense instead.
Sealing vs. coating: what's the difference?
A coating is a built-up film on top of the concrete. Polyurea basecoat, flake, polyaspartic topcoat - the stuff we do in garages. It looks like a finished floor with depth and color.
A sealer is a penetrating product that soaks into the concrete and protects it from water, salt, and staining without sitting on top as a film. You still see the concrete. It just holds up better.
- Coating: film-forming, decorative, $7-9 per sqft, best indoors
- Sealing: penetrating, protective, $2-4 per sqft, works outdoors
Why don't we put flake coatings on outdoor patios?
This is the question I have to answer a few times a month, and I'll give you the straight version.
The polyaspartic topcoats we use in garages are UV-stable for indoor light levels. Put them under full Wisconsin summer sun plus a winter freeze-thaw cycle plus ground moisture wicking up from below, and you're stacking conditions the product was not designed for. I've seen film coatings fail on outdoor patios in 2 to 3 years. Peeling at the edges, hazing, moisture blisters.
There are specialty outdoor coatings made for pool decks and exterior slabs, but they're a different product category, they cost more, and they still have a shorter service life than indoor systems. For most homeowners, the honest answer is: seal it, don't coat it.
What does a typical patio sealing job look like?
A 350 sqft back patio in River Falls, 8 years old, some staining from grill grease and pollen, homeowner wants it protected going into next winter:
Clean and prep (pressure wash, degrease): $150. Penetrating silane-siloxane sealer material: $120. Labor (half-day, single installer): $450. Mobilization and overhead: $150. Total: $870, about $2.48 per sqft.
Two coats of a quality penetrating sealer will give you 3 to 5 years of serious water, salt, and stain protection before it needs a refresh. Refresh coats are cheaper because the surface is already clean.
When is sealing worth it?
- New concrete in its first year: sealing early extends the life of the slab significantly
- Before winter: water and salt are what destroy Wisconsin patios. Sealed concrete shrugs both off
- Stained or porous concrete: stops further staining, makes cleanup easier
- Stamped or colored concrete: sealing preserves the look and keeps the color from fading
- Before selling the house: a clean sealed patio photographs well and shows maintained
When is sealing not worth it?
- Patio is already spalling or crumbling: sealing doesn't fix failed concrete. You need repair or replacement first
- You're planning to tile over it: don't seal first, you'll fight the adhesive
- Heavy lichen or moss growth with active moisture intrusion: fix drainage first
Front porch sealing
Front porches are their own thing. Smaller, usually covered, less direct UV. On a small covered front porch where sun and rain aren't constantly hitting, we can sometimes do a light decorative system that splits the difference - a tinted sealer or a thin epoxy-polyaspartic combo that holds up because of the covered condition. These runs $5 to $7 per sqft on small porches and lasts 5 to 8 years with minimal UV exposure.
I will always look at the actual porch conditions before I quote that. Sun exposure, roof coverage, and drainage all change the answer.
The honest alternative: decorative concrete overlays
If you want your patio to look fundamentally different - not just sealed and clean - a decorative concrete overlay is a different product category that I'll sometimes refer out. Overlays run $8 to $15 per sqft and can look like flagstone or stamped concrete. That's not what I specialize in, but I know who does.
More at patios and porches.
What a patio sealing quote should include
- Pressure wash and degrease of the existing slab
- Two coats of penetrating silane-siloxane or acrylic sealer
- Crack chase and patching for anything over 1/8 inch
- Honest expectation on sheen (penetrating sealers leave a matte to low-sheen look, not a shiny film)
If an installer quotes you $8 per sqft for a patio "coating" and promises a garage-floor finish outdoors, ask what happens at year 3. Their answer will tell you a lot.
Dave gives you a straight number on the first call. No pressure, no "manager specials." Get a free quote or call Dave at (715) 307-8302.