Sealing, Staining & Epoxy in Fresno California

Every coating failure we get called out to fix tells the same story. The floor looked great for a few months, then it lifted at the garage door line, or a tire pulled a patch up in August, or the whole thing went milky after the first foggy winter. Almost none of those are product failures. They are bond failures, and the bond was decided on prep day.

So we start with two tests. Water on the slab tells us whether anything is already on it, because a surface that beads has a sealer or a curing compound in the way. Then a moisture test tells us whether the slab is pushing water up from below. Plenty of Valley slabs were poured before vapor retarders were standard, and those will do exactly that, and a coating over a slab that is passing moisture delaminates in sheets no matter what you spent on the product.

Prep is diamond grinding, not acid etching. Grinding gives an even, measurable profile across the whole floor and takes off the weak surface layer along with old sealer, glue and paint. Etching is inconsistent, leaves residue behind and does nothing about contamination. We run vacuum shrouded grinders, because grinding concrete produces respirable crystalline silica and an enclosed garage is the worst possible place to be casual about that.

Then the system goes down in order: crack and spall repair, prime or base coat, color or flake if you want it, then the topcoat, with each coat landing inside the recoat window for the one before it. Miss that window and the next coat is relying on adhesion to a cured surface instead of a chemical bond between layers, which is where a floor learns to peel.

Cost moves with square footage, how much grinding and old coating removal the slab needs, how much crack and spall repair there is, whether you want flake or solid color, and which topcoat suits the way the floor gets used. One written number before we start.

Get My Free Sealing Or Epoxy Quote

They fail because the slab was wet, the surface was never profiled, or something was left on it that the coating could not bond through.

Moisture is the one nobody checks. An older slab poured without a vapor retarder, a high water table, or irrigation running against the foundation all push water vapor up through the concrete. A coating over that lifts in sheets or bubbles, and no amount of product quality changes it. A calcium chloride or relative humidity test takes a day and tells you whether you need a moisture tolerant primer system or whether you should not be coating at all.

Profile is the one that gets skipped. Coatings need a mechanical key, and a hard trowelled garage slab is closed tight. Grinding opens it to a consistent profile across the entire floor. This is the single biggest difference between a professional install and a weekend kit, and it is why the kit lifts at the door where the tires work hardest.

Contamination is the one that surprises people. Oil that soaked into concrete over fifteen years comes back up through a coating as a fisheye or a soft spot that never hardens. Degreasing pulls what is near the surface and grinding takes more, but past a certain depth it has to be cut out or accepted. Silicone from an old caulk joint does the same thing over a much smaller area, and it is why one dinner plate sized patch will refuse to cure while the rest of the floor is perfect.

Old coatings cannot be built on. A new epoxy is only ever as good as what it is stuck to, so a failing coating gets ground off rather than sealed over. That is honest labor and we quote it as its own line so you can see the cost before you commit.

Recoat windows and cure times finish the list. Past the recoat window a coat has to be mechanically abraded before the next one goes on. And driving on a floor before it has cured is what causes hot tire pickup, the tire shaped patch that lifts in August and is the most common failure we get called about in this Valley.

If your slab is spalling, oil soaked and pushing moisture, we will tell you it is a repair job before it is a coating job. Pretending otherwise just costs you the price of the coating twice.

Get A Fast Quote

We seal, stain and coat concrete across Fresno and the Central Valley, from single garages to warehouse floors.

Two local conditions decide how these jobs go. The first is heat. A garage sitting at 105 degrees cuts the working time of a fast curing topcoat roughly in half, so we start early, mix small and never stretch a batch. The second is what is underneath the slab. A lot of the Fresno and Clovis housing stock from the 1950s through the 1970s went down without a vapor retarder, and those slabs pass moisture up into anything you put on them, which is exactly why we test instead of guessing.

Outside, the west facing driveway is the surface that punishes a topical sealer. Full afternoon sun, sprinkler overspray and 100 degree days make a hard service life for a film, so we often steer that surface to a penetrating sealer where there is nothing on top to fail. The same pattern runs through Madera, Visalia, Hanford, Tulare and Merced, with cooler and later seasons up toward Oakhurst.