Best Concrete Floor Sealer (2026): 4 Sealers Compared

Compare the picks

Specifications are manufacturer rated, as published on each listing and collected 22 October 2026. Where a listing contradicts itself, both figures are shown.

How we scored them

Each sealer is scored on performance, build, value, safety and warranty, with the weights published on our How We Pick page. The Ghostshield states DOT approval, so it is the only one that scores on safety, and none of the four states a warranty term.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

What the listings tell you

We read four sealer listings. Three state a coverage figure per gallon: up to 250 square feet on the Ghostshield and 175 to 225 square feet on the two Armor products, while the Zep states none. Two are water-based penetrating sealers, one is a solvent-based acrylic, and the Zep is an interior floor sealer. One listing states DOT approval, one states 0 VOC, and one states a 30-minute dry time. None of the four states a warranty term.

Buying guide: picking the best concrete floor sealer

Penetrating vs film-forming

The four sealers split into two families. The Ghostshield Siloxa-Tek 8500 and the Armor SX5000 WB are penetrating sealers: they soak into the concrete and form a water-repellent barrier below the surface, so there is no film on top to peel, flake or wear off. The Ghostshield states it is 100% breathable and non film forming, and the SX5000 states it works entirely below the surface with no surface film to maintain. The Armor AR350 is the opposite: a solvent-based acrylic that forms a low-gloss film on top, which is what gives the wet look and the color enhancement. A film looks richer but lives on the surface, so tire traffic and abrasion wear on the coating itself. The Zep is a different animal: an interior floor sealer and finish for vinyl, tile, terrazzo and unfinished concrete, not a penetrating concrete treatment. For a garage slab that sees cars, a penetrating sealer asks less of you over time: when the SX5000 needs a refresh you apply 1 to 2 coats to a clean, dry, absorbent surface, and the Ghostshield never peels because there is nothing to peel. A film-forming acrylic like the AR350 refreshes with a single coat when the gloss dulls. An epoxy vs acrylic garage floor comparison covers the film side in more depth. Pick the family first, then the product.

Coverage per gallon

Coverage decides how many containers the job needs. The Ghostshield covers up to 250 square feet per gallon per coat, the highest figure here. The Armor SX5000 WB and the Armor AR350 each cover 175 to 225 square feet per gallon. The Zep states no coverage figure at all, which makes it hard to plan a floor with. Note the up to and the range: actual coverage moves with how porous the concrete is, and the listings state these as maximums, not promises. For a large garage floor, the 5-gallon Armor containers cover far more ground per purchase than the 1-gallon Ghostshield or Zep, even though the Ghostshield’s per-gallon figure is the highest. When a listing gives a range like 175 to 225, plan with the low end so you do not run short mid-coat. And remember these are per-coat figures: the SX5000’s reseal calls for 1 to 2 coats, so a two-coat job doubles the material.

Water-based vs solvent-based

Two of the four are water-based: the Ghostshield and the Armor SX5000 WB. The SX5000 states 0 VOC and no odor, with cleanup in soap and water. The Ghostshield states a low VOC formula. The Armor AR350 is solvent-based, and the listed formulation is 700 VOC, with 350 VOC and 50 VOC formulations available to meet the rules in all 50 states. VOC matters twice: for the air you breathe while applying it, and for whether your state allows the sale. If the garage is attached to the house, a 0 VOC water-based sealer keeps the fumes out of the living space. Solvent-based acrylics like the AR350 give the wet look that water-based penetrating sealers do not, so the tradeoff is real: appearance against fumes and compliance. The Zep states no VOC figure. Whatever you choose, apply it with the garage door open and the air moving.

Wet look vs natural look

The AR350 exists for one reason: the wet look. It darkens and enhances the concrete, and the listing says if you like how your concrete looks when wet, you will like the finish. The Ghostshield and the SX5000 do the opposite on purpose: both state they will not change the look, color or feel of the concrete. The Ghostshield leaves the original natural appearance; the SX5000 states the substrate will look and feel exactly as it did before sealing. The Zep sits in between: a clear coating that enhances the gloss of top coatings on interior floors. There is no right answer, only the slab you want to look at every day. A wet-look acrylic shows tire marks and wear sooner because the film is on the surface; a penetrating sealer shows nothing because there is nothing to see. If the floor is a showpiece, the AR350’s enhancement is the point. If the floor is a workshop, the invisible protection of the Ghostshield or SX5000 keeps the concrete looking like concrete.

Dry time and recoat

Only the Zep states a dry time: 30 minutes. The other three state no dry time, so do not plan the day around a number they do not give. What they do state is lifespan and recoat. The SX5000 states protection for 7 to 10 years below the surface. The Ghostshield states up to 10 years on vertical applications installed by a certified applicator. The AR350 states a long-lasting finish designed to last for years, and reseals with a single coat on a clean, dry surface. The practical read: a penetrating sealer is a multi-year commitment you barely think about, while a film acrylic asks for a maintenance coat when traffic dulls the gloss. Keep foot and vehicle traffic off until the surface is fully dry, whatever the listing states: the Zep’s 30 minutes is the only stated figure, and it applies to the Zep alone.

Interior vs exterior

Match the sealer to where the slab lives. The AR350 is for exterior concrete: driveways, walkways, patios, pool decks, sidewalks and walls. The Zep is for interior floors: vinyl composition, rubber, asphalt, tile, terrazzo, unfinished concrete and no-wax vinyl. The Ghostshield lists driveways, garages, basements, patios and pool decks, which covers both sides of the garage door. The SX5000 lists concrete, brick, pavers, bluestone, flagstone, slate, natural stone and masonry. A garage floor is the borderline case: the Ghostshield and SX5000 both name garages, the AR350’s exterior rating covers the driveway apron, and the Zep’s unfinished concrete covers an interior slab that never sees weather. Do not use an exterior solvent acrylic where the listing does not allow it, and do not expect an interior floor finish to survive road salt.

What a sealer actually protects against

The listings agree on the enemies. The AR350 protects against surface abrasion, foot and vehicle traffic, road salts, UV rays, water absorption, snow and ice. The Ghostshield resists chlorides and deicing salts, mitigates cracking, spalling and pitting, and protects against freeze-thaw damage. The SX5000 reduces water absorption by up to 95% and resists cracking, spalling, ice damage, salt damage, organic surface growth and staining. The Zep resists stains from food, drink and tracked-in dirt. None of them fixes a cracked or spalled slab: sealer is prevention, applied to a properly cleaned and prepped surface, not a repair. If the concrete is already flaking, the listings do not promise to glue it back together. Clean first: the AR350 listing even names a companion cleaner, the Armor MSC100, sold separately. A garage floor cleaner for power washers handles the wash before you seal.

Garage Fit Check

• Measure the slab and check the coverage: 175 to 225 square feet per gallon on the Armor products, up to 250 on the Ghostshield, none stated on the Zep.
• Check the VOC rules: the AR350 lists 700 VOC in this formulation with 350 and 50 VOC options, while the SX5000 lists 0 VOC.
• Confirm the surface: the AR350 is for exterior concrete and pavers, the Zep for interior floors, the Ghostshield and SX5000 for concrete, brick, pavers and masonry.
• Plan the application: roller or sprayer for the AR350, pump sprayer for the SX5000, sprayer, roller or brush for the Ghostshield.

Frequently Asked Questions

How do you seal a concrete floor?

Start with a properly cleaned and prepped surface; every listing here requires it. Apply with a roller or sprayer for the AR350, a pump sprayer for the SX5000, and a sprayer, roller or brush for the Ghostshield. The Zep goes on interior floors as part of a floor care process. Let each coat dry fully before traffic returns.

What does concrete sealer do?

It slows water and salt from getting into the concrete, which is what causes cracking, spalling and freeze-thaw damage. The SX5000 states it reduces water absorption by up to 95%. Film sealers like the AR350 add a protective layer on top; penetrating sealers like the Ghostshield and SX5000 work below the surface.

How long does concrete sealer take to dry?

The Zep is the only one here that states a dry time: 30 minutes. The other three state no dry time. Plan on keeping the floor clear until it is fully dry to the touch, and longer before parking on it.

How much concrete sealer do I need for a garage floor?

Divide the floor area by the coverage per gallon: up to 250 square feet per gallon for the Ghostshield, 175 to 225 for the two Armor products. The Zep states no coverage. Plan with the low end of a range, and remember a two-coat job needs twice the material.

Can I use a wet-look sealer in the garage?

The AR350 is listed for exterior concrete and pavers, not interior garage floors. For a garage, the Ghostshield and SX5000 both name garages in their uses, and the Zep covers unfinished concrete indoors. Match the listing’s stated uses to your slab.

Related: the epoxy vs acrylic garage floor guide, the best garage floor cleaner for power washers, our garage upgrades hub and the vinyl vs epoxy garage floor comparison.