Who this is for
This guide is for facility managers and BSC operations staff managing hard floors in industrial, warehouse, retail, or institutional settings where concrete is the primary substrate. If your facility has undergone a flooring upgrade — particularly in distribution centers, manufacturing spaces, or modern retail environments — you may be maintaining one of three distinct surface types that require different programs.
It is also for janitorial supervisors who have inherited a "clean the concrete" instruction without specifics. The maintenance approach that protects a polished concrete floor will damage an epoxy coating. Getting this wrong is expensive.
Substrate identification: what you actually have
Before writing any maintenance protocol, confirm the substrate. Appearance alone is not sufficient — all three can present as shiny, gray, and hard. Use these distinguishing characteristics:
- Polished concrete: The sheen comes from the concrete itself, mechanically ground and densified with a chemical hardener. No topical coating. The surface feels like grinding the concrete — no layer can be scratched away with a key or a fingernail. Typically found in high-end retail, museums, modern office lobbies, and some manufacturing facilities.
- Sealed concrete: A topical sealer (acrylic, epoxy, or polyurethane) has been applied over the concrete surface. The sealer provides the sheen. A key scratch test on an inconspicuous area will reveal a coating — the scratch looks white against the sealer surface. Common in warehouses, garages, and institutional corridors.
- Epoxy coating: A two-component thermosetting resin applied as a thick coating (typically 10–30 mils). It bonds to the concrete substrate and cures as a hard, continuous film. Common in food processing, pharmaceutical, and heavy industrial facilities. Usually has a more uniform color — gray, tan, or a safety color — applied by roller or squeegee application. Check the original installation records if available.
Polished concrete: maintenance protocol
Polished concrete is maintained — not refinished. There is no coating to restore by adding product. The goal is to keep the densified surface clean and undamaged.
Daily and routine care
Dust mop daily to remove abrasive grit. Damp mop with a pH-neutral cleaner (pH 6–8) formulated for polished concrete — verify the product is free of waxes, acrylics, and silicates that will haze the surface. Most all-purpose floor cleaners are inappropriate. The cleaner should leave no residue; test on a small area and inspect under raking light before facility-wide use.
Periodic burnishing
Polished concrete gloss is maintained with a high-speed burnisher (1,500–3,000 RPM) using a specialty polishing pad — typically a white or natural hair pad. Do not use colored pads designed for floor finish (red, blue, black) on polished concrete; their abrasiveness is calibrated for coated floors, not a densified concrete surface. Burnish frequency depends on traffic: weekly in high-traffic retail, monthly in lower-traffic corridors.
What to avoid
Never apply floor finish to polished concrete. Floor finish (acrylic polymer) sits on top of the densified surface, does not penetrate, and produces a hazy, uneven appearance. It also cannot be stripped with standard alkaline strippers without damaging the concrete's densified layer. This is one of the most common and costly errors in concrete floor maintenance.
Sealed concrete: maintenance protocol
Sealed concrete has a topical coating that can be cleaned, maintained, and — depending on the sealer type — eventually resealed. The maintenance program resembles VCT finish care more than polished concrete care, but the chemistry tolerances differ.
Daily maintenance
Dust mop and damp mop with a neutral-pH cleaner. Avoid acidic cleaners on acrylic sealers — acid softens acrylic films. Avoid solvent-based cleaners on any topical sealer unless the sealer manufacturer explicitly approves solvent contact.
Resealing and topcoat maintenance
When the sealer shows visible wear — loss of sheen, exposure of the gray concrete in high-traffic lines — the sealer needs to be replenished. For acrylic sealers, a maintenance coat can often be applied directly over the existing sealer after cleaning, without stripping. For epoxy or polyurethane sealers, adhesion between new and old product requires surface preparation — typically light abrasion with a floor machine and a gray or white pad. Always verify with the sealer manufacturer's recoat window and surface prep requirements before applying a new layer.
Epoxy coatings: maintenance protocol
Epoxy floor coatings are durable but chemically sensitive. The cured epoxy film resists most cleaning chemicals at normal use-dilutions — but concentrated solvents, strong acids, and some alkaline strippers will attack the resin, causing softening, discoloration, or delamination.
Daily and routine maintenance
Dust mop and damp mop with a neutral-pH cleaner. For food-processing or pharmaceutical environments, use an EPA-registered cleaner-disinfectant verified as compatible with epoxy substrates — check the product's SDS Section 2 (Hazard Identification) and the epoxy manufacturer's chemical resistance chart. Most epoxy manufacturers publish chemical resistance data by reagent category; consult this before introducing any new cleaning product.
Mechanical maintenance
Autoscrubbers are the preferred mechanical tool for epoxy floors — they clean and recover solution in a single pass without leaving standing water, which can penetrate epoxy seams and cause adhesion failure over time. Use a soft squeegee and a non-abrasive pad (white or tan). Aggressive rotary scrubbing with abrasive pads will abrade the epoxy surface, dulling the finish and opening micro-scratches that trap soil.
Recoating epoxy
When epoxy coating shows wear, repair is substrate-specific. Most epoxy systems require mechanical abrasion (diamond grinding or shot blasting) of the worn area before recoating — painting over worn epoxy without surface preparation produces poor adhesion and early peeling. This is a specialty contractor task, not a janitorial maintenance task. Identify wear areas early and flag them for preventive recoat before the substrate concrete is exposed.
Common mistakes
Applying floor finish to polished concrete. This is the most frequent error. Floor finish hazes polished concrete and cannot be removed without risking damage to the densified layer. If you see a polished concrete floor with an uneven, slightly milky sheen, finish application is likely the cause.
Using alkaline strippers on sealed or epoxy concrete. Alkaline floor strippers formulated for VCT finish will attack topical sealers and some epoxy systems. Never use VCT-program chemistry on concrete substrates without verifying chemical compatibility from both the cleaner SDS and the flooring manufacturer's documentation.
Pressure washing epoxy floors with hot water. High-temperature water — particularly steam — softens cured epoxy and can cause the coating to blister or separate from the substrate. Use cold or warm water only, and verify temperature limits from the epoxy manufacturer's technical data sheet.
Skipping the chemical resistance check when switching cleaning products. Industrial environments frequently change cleaning products based on cost or availability. Every change on an epoxy floor should be preceded by a check of the epoxy manufacturer's chemical resistance chart. A new floor cleaner that contains a solvent the epoxy is not rated for can cause rapid surface degradation.
Decision framework: which protocol applies
- Obtain installation records — confirm substrate type from contractor documentation
- Perform key scratch test in an inconspicuous area to confirm presence/absence of topical coating
- Contact the flooring manufacturer for the current recommended maintenance guide
- Verify cleaning chemistry compatibility against both product SDS and manufacturer's chemical resistance data
- Select mechanical approach (pad type, machine RPM) based on the confirmed substrate
- Use the Pad Selector to match abrasion level to surface and task before starting any mechanical program
Final recap
Polished concrete, sealed concrete, and epoxy coatings each require a distinct maintenance program. Polished concrete is maintained mechanically — no topical products. Sealed concrete is maintained with neutral chemistry and periodic topcoat renewal. Epoxy requires neutral chemistry, verified chemical compatibility, and autoscrubber-based mechanical maintenance. Misidentifying the substrate and applying the wrong program accelerates wear and can cause irreversible damage. Confirm before you clean.
Floor Program Builder
Build a structured maintenance schedule for any hard floor substrate — including task frequency, chemistry type, and mechanical equipment — calibrated to your facility's traffic and cleanliness standard.
Open Floor Program BuilderRelated guides
Frequently Asked Questions
How do you tell polished concrete from epoxy by feel and look?
Polished concrete's sheen comes from the densified slab itself — there is no topical coat sitting on top of it. Epoxy is a coating layer, a separate film over the concrete. Both can read as the same glossy floor from across a room, which is exactly the problem: appearance alone misleads. Confirm the substrate before anyone writes a protocol against it.
Why is one "just clean the concrete" SOP dangerous?
Because concrete describes what is under the surface, not what the surface actually is. The chemistry and pads that protect polished concrete can damage epoxy, and the reverse is equally true. A single SOP applied across both eventually meets the floor it was never written for, and the correction at that point is an expensive recoat rather than a re-clean.
What should happen before a floor protocol gets written?
Confirm the substrate first, in writing, because appearance alone will not settle it. A polished slab and an epoxy coating can look alike while demanding opposite chemistry and pad choices. Identifying which one you have is the step that determines every decision downstream — product selection, pad grade, and whether the program protects the floor or slowly destroys it.
Who actually needs substrate-specific protocols?
Facility and BSC teams in warehouses, plants, retail, and institutions, especially anywhere floors have been upgraded recently. The most exposed people are supervisors handed a vague instruction that just says concrete and expected to turn it into daily work. If the building's floors changed and the SOP did not change with them, that gap is where recoat costs come from.