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ARMORTHANE PROTECTING YOUR WORLD

PROTECTING YOUR WORLD

ARMORTHANE PROTECTING YOUR WORLD

Polished Concrete
vs Epoxy: Which
Floor Fits Your Slab?

Cost, lifespan, moisture, slip resistance and upkeep compared with sourced numbers, plus a selector and a lifetime cost calculator.
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Tell us about the space, the slab condition, what the floor sees every day and whether moisture has been tested. We will connect you with a certified applicator near you.

  • Square footage and use
  • Slab age and condition
  • Chemicals, vehicles or wet areas
  • Moisture test results if any
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Step 1 of 3
$3–$12
Per sq ft for polished concrete, cream to exposed aggregate
HomeGuide, 2026
$4–$10
Per sq ft for an installed epoxy floor
HomeGuide, 2026
75% RH
Typical slab moisture ceiling for epoxy and other coatings (ASTM F2170)
IFTI moisture testing guide
0.42
Minimum wet DCOF for level interior floors under ANSI A326.3
Sherwin-Williams slip guide

Polished concrete vs epoxy is really a question about your slab. Polishing grinds and densifies the concrete you already have, so it rewards a good slab and exposes a bad one. Epoxy covers the concrete with a resin film, so it hides a lot and protects a lot, but only if it stays bonded. We make coatings, not polishing equipment, and we still tell people to polish when the slab and the use call for it. This guide compares the two on cost, lifespan, moisture, slip resistance and maintenance with sourced numbers, then gives you a selector and a lifetime cost calculator so you can run your own floor through both.

Quick answer

Choose polished concrete for a sound, flat, fairly new slab in dry interior spaces like retail, offices, showrooms and homes, where low long-term maintenance cost and a natural look matter most. Choose epoxy, or a polyaspartic or polyurea coating, when the slab is worn, stained or patched, when you need chemical, oil or acid resistance, color and line marking, or texture for wet areas. Test slab moisture before either. High moisture rules out most epoxies and does not stop polishing.

What's in this guide
  1. 1How each floor is made
  2. 2Polished concrete vs epoxy comparison table
  3. 3Polished concrete or epoxy selector
  4. 4Lifetime cost calculator
  5. 5Slip resistance
  6. 6Moisture, chemicals and wear
  7. 7FAQ
The difference

How polished concrete and epoxy are made

Mechanical

Polished concrete

Diamond tooling grinds the slab in steps, a chemical densifier hardens the surface, and progressively finer grits bring up the sheen. Concrete Network describes four levels: flat (below 100 grit), satin (100 to 400 grit), semi-polished and highly polished (800 grit and higher, gloss readings up to 60 to 80). How deep you grind sets the look, from cream (little aggregate showing) to salt and pepper (about 1/16 in cut) to medium and large aggregate (1/8 to 1/4 in).

Film-forming

Epoxy floor coating

The slab is ground or shot blasted to open it up, cracks and pits are filled, then a primer and one or more coats of epoxy go down, often with broadcast flake or quartz and a clear topcoat. Film thickness depends on the system, from a thin roll coat to a multi-coat broadcast build. It is a separate layer that has to stay stuck to the concrete. Our epoxy floor coating guide breaks down the nine common system types.

Plain versionPolishing changes the concrete. Epoxy covers the concrete. Everything else in this comparison follows from that.
Side by side

Polished concrete vs epoxy: comparison table

Installed cost and service life from 2026 cost guides and an industry coatings consultant. Click any header to sort.

FloorInstalled $/sq ftUpkeep intervalHides slab flawsSlab moisture toleranceChemical and stain resistance
Polished, cream finish$3–$8Reseal or guard every 2–5 yrsNoHigh, no film to blisterModerate; acids etch
Polished, salt and pepper$4–$10Reseal or guard every 2–5 yrsNoHigh, no film to blisterModerate; acids etch
Polished, exposed aggregate$6–$12Reseal or guard every 2–5 yrsPartlyHigh, no film to blisterModerate; acids etch
Water-based epoxy$4–$10Recoat every 3–5 yrsYesLow, often under 75% RHGood
100% solids epoxy system$4–$10Lasts 10–20 yrsYesLow unless a vapor-tolerant primer is usedVery good
Sources: HomeGuide polished concrete and epoxy flooring cost guides (2026); IFTI on coating moisture limits. HomeGuide gives one $4–$10 installed range for epoxy; flake, quartz and metallic systems run higher.
Tool 1

Polished concrete or epoxy: which fits your floor?

Pick your slab condition, moisture, use, chemical exposure and top priority. The selector scores polished concrete, epoxy, and polyaspartic or polyurea coatings using the factors that decide most of the floors we are asked about.

Floor selector

Polish vs. coat score

Each option starts at 60 and gains or loses points for each condition. Scores are a guide to the conversation with your contractor, not a spec.

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    Tool 2

    Polished concrete vs epoxy lifetime cost calculator

    First cost is only part of it. This calculator adds the renewals each floor needs over the period you choose: resealing a polished floor every 2 to 5 years at $1 to $3 per sq ft (HomeGuide), and replacing a water-based epoxy every 3 to 5 years or a 100% solids epoxy every 10 to 20 years at HomeGuide's $4 to $10 installed. Low figures use the cheapest price and longest interval; high figures use the opposite.

    Calculator

    Cost over the life of the floor

    Renewals = ceiling(years / interval) - 1. Daily cleaning labor is not included for either floor.

    —
    Polished, total
    —
    Epoxy, total
    —
    Per sq ft per year (mid)

    Two things the math does not capture. A coatings consultant at KTA notes that high-shine polished floors need daily maintenance and periodic burnishing, roughly quarterly, to hold their gloss. And the epoxy numbers assume the coating stays bonded. On a slab with a moisture problem, an epoxy can blister and delaminate long before its rated life, which turns a cheap floor into an expensive one.

    Safety

    Slip resistance: the factor people skip

    Both floors can be slippery when wet, and both can be made safer. The difference is how much control you have.

    The current US benchmark is ANSI A326.3. Sherwin-Williams summarizes its minimums as a wet dynamic coefficient of friction (DCOF) of at least 0.42 for level interior floors that get wet, with manufacturers generally declaring 0.50 or more for wetter interior areas and 0.55 or more for exterior wet areas and oily areas.

    Polished concrete

    Results are mixed. Safety Direct America reports wet DCOF readings on polished concrete from 0.41 to 0.75, and cites an industry study with very high gloss floors around 0.50. But the same firm found wet pendulum values of only 7 to 10 on its samples, against a UK minimum of 36, and argues that DCOF alone is not a reliable way to judge slip risk on polished concrete. It also notes that several large UK operators, including London Underground, have stopped installing it. A lower sheen level helps; so does keeping the floor clean of dust and liquids.

    Epoxy and other resin floors

    A smooth, glossy epoxy is slick when wet too. The difference is that traction can be built into the system. Sherwin-Williams raises DCOF with broadcast aggregates (flake, quartz) and texture additives such as aluminum oxide. That is how we build floors for wash bays, kitchens and ramps. A coating can be anything from smooth to sandpaper, and you choose where on that range it sits.

    Wet areasIf the floor is wet as a matter of routine, such as a commercial kitchen, a car wash, a pool deck or a dairy, we would not polish it. Spec a textured resin system and ask for slip test data on a sample with the texture you will actually get.
    Durability

    Moisture, chemicals and wear

    Polish wins

    Moisture in the slab

    IFTI lists the typical ceiling for epoxy and other coatings at 75% relative humidity by ASTM F2170, or 3 lb per 1,000 sq ft per 24 hours by calcium chloride test. Above that, coatings blister and delaminate. A polished floor has no film to push off. Some coating systems use moisture-tolerant primers that KTA notes can bond at relative humidity up to 99%, at extra cost.

    Coating wins

    Acids, oils and staining

    A densified, guarded polished floor resists water and light spills, but it is still cement. Acids, sugars, wine and citrus etch it, and oil wicks in if left. Resin coatings put a non-porous barrier between the chemical and the slab, which is why food plants, auto shops and labs coat.

    Depends

    Abrasion and impact

    Polished concrete has no film to scratch or chip; worn spots can be re-honed. Epoxy scratches and can chip at joints under steel wheels, but a scratched coating is recoated, not replaced. KTA puts typical coating service life at 5 to 10 years; HomeGuide gives 10 to 20 for solid epoxy.

    Coating wins

    Ugly or damaged slabs

    Polishing shows every patch, crack and stain. If the slab is not good enough to look at, a coating is the practical choice. Old floors that need flattening first are covered in our self leveling concrete guide.

    Where ArmorThane fits

    We do not polish concrete. When a floor needs a coating, our applicators install polyaspartic and polyurea systems rather than standard epoxy where fast return to service, UV stability or flexibility matters. ArmorFloor aliphatic polyaspartic is one example. Polyaspartics generally return to service faster than standard epoxy, and aliphatic chemistry resists the yellowing in sunlight that most epoxies show. Our polyaspartic vs epoxy comparison covers that trade-off in detail, and our industrial flooring page shows systems for heavy traffic.

    Want color on a polished floor? Dyes and stains are often applied during polishing; our concrete stain guide explains why dyes stay indoors and which stains hold up outside.

    Still deciding?

    Have the slab tested, then choose.

    A certified ArmorThane applicator can check moisture, condition and use, and tell you honestly whether your floor should be coated or would be better polished by a specialist.

    Get a free quoteFind an applicator

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    FAQ

    Polished concrete vs epoxy questions

    Is polished concrete cheaper than epoxy?

    Up front they overlap. HomeGuide puts polished concrete at $3 to $12 per sq ft depending on how much aggregate is exposed, and epoxy at $4 to $10 installed. Over 10 or more years polished concrete is often cheaper because it only needs resealing every 2 to 5 years, while water-based epoxies need recoating every 3 to 5 years.

    Which lasts longer, polished concrete or epoxy?

    Polished concrete, in general. HomeGuide says it can last a lifetime with minimal maintenance, because the wear surface is the slab itself. Epoxy lasts 3 to 5 years for water-based products and 10 to 20 years for solid epoxy, per HomeGuide, provided the slab stays dry enough for the coating to stay bonded.

    Is polished concrete or epoxy better for a garage?

    Usually a coating. Garages see oil, brake fluid, road salt and hot tires, and they need to be cleaned easily. Polished concrete stains and etches. Most garage floors also have cracks and stains that polishing would show. See our garage floor coating guide for system options.

    Is polished concrete slippery?

    It can be, especially when wet or dusty. Safety Direct America measured wet pendulum values of 7 to 10 on polished samples against a UK minimum of 36. A lower sheen and good housekeeping help. Epoxy is also slick when smooth and wet, but texture can be broadcast into a coating to raise traction.

    Can you put epoxy over polished concrete?

    Not directly. A polished, densified surface is too smooth and closed for a coating to bond. It has to be ground or shot blasted back to an open profile first, which removes most of the polish you paid for.

    Can any concrete be polished?

    Most sound slabs can, but the result depends on the concrete. Soft, heavily patched, cracked or oil-soaked slabs polish poorly and show every flaw. HomeGuide notes damaged concrete may need $3 to $12 per sq ft of leveling or repairs first, at which point a coating is often the better value.

    How do I know if my slab has too much moisture for epoxy?

    Test it. The preferred method is in-situ relative humidity probes per ASTM F2170. IFTI lists 75% RH or 3 lb per 1,000 sq ft per 24 hours as the typical ceiling for epoxy. Above that you need a moisture-tolerant primer, a different system or polishing.

    Which is better for a warehouse?

    For large dry warehouses with a sound slab, polished concrete is hard to beat on lifetime cost. Where you need chemical resistance, line striping that lasts, battery-charging areas or clean rooms, a resin coating makes more sense. Many facilities do both: polish the racking aisles and coat the problem areas.

    Keep reading

    Related floor guides

    Coatings

    Epoxy floor coating

    System types, data-sheet numbers and a coverage calculator.

    Prep

    Self leveling concrete

    Underlayment vs. topping, bag calculator and flatness checker.

    Garage

    Garage floor coating

    What actually survives hot tires, salt and fluids.

    AT
    Written by the ArmorThane technical team. We have manufactured polyurea, polyurethane and polyaspartic coatings in Springfield, Missouri since 1989, and our applicators coat commercial, industrial and residential floors every day. Costs and standards are from the sources below. Updated October 2026.

    Sources

    1. HomeGuide, polished concrete floor cost (2026): homeguide.com/costs/polished-concrete-floor-cost
    2. HomeGuide, epoxy flooring cost (2026): homeguide.com/costs/epoxy-flooring-cost
    3. Concrete Network, polished concrete levels: concretenetwork.com/concrete/polishing/levels.html
    4. KTA-Tator, concrete floors: coat, cover or polish: kta.com/concrete-floor-coat-cover-polish
    5. IFTI, concrete moisture testing requirements by flooring type: ifti.com/concrete-floor-moisture-testing-requirements-for-different-flooring-types
    6. Sherwin-Williams, guide to slip resistance for resinous flooring: industrial.sherwin-williams.com/.../guide-to-slip-resistance-resinous-flooring
    7. Safety Direct America, polished concrete floors slippery when wet: safetydirectamerica.com/polished-concrete-floors-slippery-when-wet

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