The best way to clean a commercial concrete floor is to remove dry soil first, then wet-clean with a pH-neutral floor cleaner that is scrubbed in and vacuumed back up, ideally by an auto scrubber, so the floor is left clean and dry in one pass. Save degreaser for the zones that actually carry oil and grease, and use a pressure washer with a surface cleaner outdoors or on bare concrete that can take water.
This guide covers warehouses, shops, garages, retail back rooms, schools and loading areas: how to tell what kind of concrete you have, the daily routine, when a machine beats a mop, and the chemistry that is safe for each surface.
- Sweep before you wet-clean. Grit left on concrete turns into an abrasive slurry that dulls sealers and polished floors and wears out scrubber pads and squeegee blades early.
- Use a pH-neutral cleaner every day and a degreaser only where the grease is. Neutral chemistry will not haze sealed or polished concrete; alkaline degreaser belongs in shop bays and dock areas.
- An auto scrubber cleans and dries in one pass, the most direct way to meet OSHA's rule that workroom floors be kept clean and, where feasible, dry.
- Size the machine to the floor. A 15-inch mini scrubber fits small rooms, a 20-inch walk-behind covers most shops and warehouses, and ride-ons take over on large open floors.
Is Your Concrete Sealed, Polished or Bare?
Put a few drops of water on the floor. If they bead or sit on top, the concrete is sealed, coated or polished; if they darken the concrete and soak in within a minute, it is bare. That one test decides how aggressive your cleaning can be.
| Concrete | How to tell | Daily chemistry | Avoid |
|---|---|---|---|
| Sealed or coated | Water beads; satin or gloss film | pH-neutral floor cleaner | Acids, solvents, aggressive pads |
| Polished or densified | Mirror-like sheen, no film | pH-neutral floor cleaner | Acidic or high-alkaline cleaners, black stripping pads |
| Bare or broom-finished | Water darkens it and soaks in | pH-neutral daily; degreaser on oil | Acids unless you are etching on purpose |
Coatings such as epoxy vary by manufacturer, so test any cleaner on an inconspicuous area first and follow the coating maker's care instructions.
How Do You Clean a Concrete Floor Every Day?
Dry soil first, then a neutral cleaning solution, then recovery, so nothing is left to dry back onto the slab. On most commercial floors that is a sweep followed by one pass of an auto scrubber.
- Remove dry soil. Dust mop, broom or run a sweeper over the floor. Grit, pallet splinters and shrink-wrap left on the floor jam squeegees and scratch finishes.
- Mix the solution. Fill the scrubber's solution tank or a mop bucket with clean water and JANITORI Floor Cleaner No.61 at the label rate of 10 mL per 10 L of water, which works out to roughly 1 fl oz per 8 gallons.
- Test for foam on the first tank. Run the scrubber for a minute and look into the recovery tank. If foam builds, stop and reduce the dose, because foam pulled into the vacuum motor damages it. Only low-foam chemistry belongs in a scrubber.
- Scrub with the right contact. Use a red or blue pad on smooth sealed or polished concrete and a scrub brush on rough or broom-finished concrete, where bristles reach into the texture.
- Recover and dry. Let the scrubber's squeegee pick up the dirty solution as you go, overlapping passes by a couple of inches. On small areas, mop and wring or follow with a wet vacuum.
- Protect the wet zone. Put out wet-floor signs until the floor is dry. NIOSH lists caution signs around wet surfaces as part of safe cleaning procedures (NIOSH 2013-100).
No.61 needs no rinse under normal conditions, so the one scrubber pass is the whole job on a routine day.
The daily concrete cleaner. pH-neutral, low-foam at label dilution, plant-derived, low-residue and labeled for concrete, stone and tile, with no rinse needed under normal conditions. At 10 mL per 10 L, a full 14.5-gallon scrubber tank takes about 55 mL, roughly 64 cents of product at the 3.6 L jug price.
For the greasy zones only: shop bays, forklift lanes, dock plates. Mix 20 mL per 4 L, pre-spray, let it dwell, scrub, then rinse, because a degreaser is rinsed where No.61 is not.
Should You Use a Floor Scrubber or a Mop on Concrete?
Use a mop for small rooms and spot cleaning; switch to an auto scrubber once the floor is large, busy or has to be dry quickly. A mop spreads progressively dirtier water back over the floor, while a scrubber lays down clean solution and vacuums the dirty solution into a separate recovery tank.
Dryness is the part a mop cannot match. OSHA requires the floor of every workroom to be maintained in a clean and, to the extent feasible, dry condition (29 CFR 1910.22(a)(2)), and a scrubber's squeegee leaves concrete walkable almost immediately instead of wet for the next shift. For the full operating routine, see how to use a floor scrubber.
What Size Floor Scrubber Do You Need for a Concrete Floor?
Match the cleaning path to the open floor area and the aisle widths. Width drives speed: a 38-inch path covers almost twice the ground per pass of a 20-inch path, but it also needs room to turn.
| Floor | Machine class | Example |
|---|---|---|
| Break rooms, small shops, restrooms, tight spaces | Mini auto scrubber, 13 to 16 in | Dapper Supply 15" mini scrubber (1.2 gal) |
| Shops, retail, schools, mid-size warehouses | Walk-behind, about 20 in | Dapper Supply 20" walk-behind (14.5 gal) |
| Long aisles, all-day use on one operator | Self-propelled walk-behind | Dapper Supply self-propelled 20" |
| Large warehouses and distribution floors | Ride-on, 30 to 38 in | Dapper Supply 30" ride-on (24 gal) or 38" ride-on (46 gal, rated 84,000 sq ft/hr) |
See every model in our commercial floor scrubber range.
How Do You Get Oil and Grease Off a Concrete Floor?
Switch from the neutral cleaner to a degreaser, but only in the greasy zones. Pre-spray Degreaser MAX No.72 at 20 mL per 4 L, give it several minutes wet, scrub with a green pad or brush, recover the solution and rinse.
Old, dark stains are a different job that needs a stronger mix, repeated cycles and usually hot water. That method is in our guide on how to get oil stains out of concrete.
How Do You Clean Outdoor or Unsealed Concrete?
Pressure wash it with a surface cleaner. Loading docks, sidewalks, drive-thrus and dumpster pads have no drain-friendly way to scrub, and a rotary surface cleaner gives even, stripe-free results where a wand leaves lines.
- Pair the attachment with the machine's pressure. The Dapper Supply 24" surface cleaner is listed at 2,500 PSI (its maker recommends a machine of 2,500 PSI or higher), which the high-flow Pressure-Pro Eagle II EB5525HG (2,500 PSI, 5.5 GPM) meets.
- Use hot water where there is oil. It cuts cleaning time on grease far more than extra PSI does.
- Keep the runoff out of storm drains. EPA stormwater guidance notes that storm drains lead directly to local waterways and recommends biodegradable, phosphate-free, water-based detergents used in limited amounts (EPA stormwater BMP).
For tip selection, see the pressure washer nozzle chart.
What Should You Never Use on a Concrete Floor?
Avoid acids on sealed or polished concrete, harsh solvents on coatings, and stripping pads on polished floors. Each one causes damage that cleaning cannot undo.
- Acid cleaners etch the cement paste and can dull polished concrete or strip a sealer.
- Solvent-based cleaners can soften some sealers and coatings.
- Black stripping pads on polished concrete cut into the polish itself.
- Letting solution dry on the floor leaves residue that attracts soil and makes floors slippery.
- The 0° pressure washer tip concentrates enough force to etch lines into concrete.
Frequently Asked Questions
What is the best way to clean a commercial concrete floor?
Sweep or dust mop first, then scrub with a pH-neutral cleaner and recover the dirty solution, ideally with an auto scrubber so the floor is left clean and dry in a single pass. Use a degreaser only in greasy zones.
Can you mop a concrete floor?
Yes, for small rooms and spot cleaning. Change the mop water often, wring the mop well and do not leave puddles. On large or busy floors an auto scrubber cleans more consistently and dries the floor as it goes.
What cleaner is safe for sealed or polished concrete?
A pH-neutral floor cleaner such as JANITORI Floor Cleaner No.61, which is labeled for concrete and needs no rinse under normal conditions. Avoid acids and high-alkaline products on sealed or polished floors, and test on an inconspicuous area first.
Do you need to rinse a concrete floor after cleaning?
Not after routine cleaning with No.61, which is a no-rinse, low-residue formula under normal conditions. Rinse after using a degreaser, and always recover the solution rather than letting it dry on the floor.
How often should a warehouse concrete floor be scrubbed?
High-traffic aisles and entrances are usually scrubbed daily or every shift, with lighter areas weekly. Scrub greasy zones such as shop bays and dock plates as often as they get dirty, because traffic film is easier to remove before it builds.
Related Guides
- How to Clean Epoxy Floors: A Commercial Guide to Safe Cleaners, Pads and Scrubbers
- How to Use a Floor Scrubber: Step-by-Step Auto Scrubber Guide
- How to Get Oil Stains Out of Concrete
- Pressure Washer Soap vs Degreaser