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Epoxy floors are chosen for their seamless surface, easy cleaning, and ability to withstand frequent use in factories, warehouses, and commercial spaces. But precisely because the surface looks hard and easy to clean, many people casually use chemicals that are too strong, tools that are too coarse, or leave water standing for too long — and only realise the problem when the coating has already become dull, scratched, or patchily discoloured. This article discusses only incorrect cleaning methods and their consequences, not correct cleaning instructions.
For the correct method, read the article Epoxy Floor Maintenance and Cleaning Done Right. That article sets out the preventive maintenance routine; this article is its counterpart: what not to do, why it causes harm, and which signs show that the floor has already been affected.
1. Using strong cleaners beyond the coating’s capacity
The most common group of mistakes is using cleaners that are strongly acidic, strongly alkaline, or strong solvents to remove stubborn stains, in the belief that stronger means cleaner. In reality, an epoxy coating has a definite chemical resistance limit, and that limit depends on each specific coating system. When a chemical exceeds that limit, the surface can become dull, patchily discoloured, softened, or lose coating adhesion.
The risk increases when the chemical is left to dwell on the floor for a long time, used in a more concentrated form than the chemical manufacturer’s instructions, or used repeatedly on the same spot. A stain removed cleanly the first time is not necessarily safe if that cleaning method is repeated weekly, because cumulative damage to the coating usually only becomes visible after a period of time.
A related mistake is mixing several different cleaners together in the hope of increasing effectiveness. Mixing not only makes the effect on the coating hard to control but can also create unwanted reactions and endanger the person cleaning. Each cleaning product must be used separately, exactly as stated on its label and in its own safety documentation.
A general safety principle: every mention of chemicals in this article is only at the general group level. Before using any product on an epoxy floor, check the TDS and SDS of that specific product, compare them with the coating system actually on the floor, and trial it on a small, hidden area before using it over a wide area. If a product’s documentation does not clearly state suitability for use on epoxy floors, do not assume on your own that it can be used.
2. Using abrasive tools that scratch the coating
The second group of mistakes is tools: stiff-bristle brushes, abrasive scouring pads, coarse scrub pads, or sharp objects used to scrape off stains. These tools may remove the stain, but at the same time they also wear away the topcoat. The initial consequence is usually only fine scratch marks and dull patches, hard to see at a quick glance.
The problem is that those scratches are not only unattractive. A scratched surface becomes rougher, traps dust and dirt more easily, and is harder to clean in subsequent cleans — creating a vicious circle: the harder the floor is to clean, the more the cleaner tends to scrub harder, and the faster the coating wears. On forklift routes and loading areas, where the surface already bears heavy loads and friction, this effect deserves particular attention.
Another form of the same group of mistakes is wet-mopping while the floor is still covered with sand, gravel, and hard debris that have not been swept or vacuumed first. When a mop or scrubbing machine drags those hard particles across the floor surface, they act no differently from sandpaper. Dry cleaning before wet mopping is therefore not a subsidiary step, but a step that protects the coating.
3. Leaving standing water and soaking the floor for a long time
An epoxy floor does not absorb water through a seamless surface, but leaving water standing for a long time is still an incorrect cleaning method. Water standing at joints, wall edges, places where the coating already has scratches, or areas with poor drainage can seep into those weak points over time. The surface also becomes more slippery while still wet, increasing the risk of slips and falls for passers-by.
Common mistakes are mopping with an excessively wet mop, pouring water directly onto the floor before mopping, or finishing mopping without collecting excess water and without letting the floor dry. Excess water not only delays returning the floor to service but also leaves marks and residues when dry, making the floor look patchy even though it has just been cleaned. In areas with electrical equipment, floor sockets, or moisture-sensitive goods, standing water creates additional risks beyond coating damage.
4. Using scrubbing machines or floor equipment unsuited to the coating
A scrubbing machine helps clean large areas quickly, but it is only suitable when the pad type, pressure, and operating method suit the epoxy coating. Using a pad that is too coarse, applying too much pressure, or scrubbing back and forth many times on the same spot can wear the topcoat much faster than hand mopping, especially at machine turning points and wall edges where the machine tends to get stuck.
Another mistake is using equipment previously used on rough surfaces, bare concrete, or outdoor areas without cleaning the pads and wheels first. Sand and debris clinging to the equipment will be carried onto the epoxy floor and cause scratching on the very first scrub. Similarly, a high-pressure water jet sprayed too close to the surface, or concentrated on one point for a long time, can exert mechanical action beyond what the coating can withstand, especially at edges and at places where the coating is already weak.
5. Failing to rinse off and leaving chemical residue on the floor
In many cases, the floor does not fail during cleaning itself but deteriorates gradually because chemical residue is not rinsed off. A residue film drying on the surface can make the floor dull, tacky, and more prone to dust, making the next clean harder and leading the cleaner to use a stronger chemical to deal with that film.
Residue left behind can also change the slipperiness of the surface: some residues make the floor more slippery when wet, others make it tacky and dust-retaining. In both cases, the surface is no longer in the state originally designed. Rinsing with clean water and collecting excess water after using chemicals is therefore part of the process, not a step that can be skipped when in a hurry.
6. Signs that the floor has already been damaged by incorrect cleaning
Common signs, in order from mild to obvious, include: unevenly dull patches compared with surrounding areas; dense fine scratches following the mopping or machine-scrubbing direction; patchy stains after chemical use; abnormally slippery or tacky surfaces when wet; and, at a more severe level, coating edges lifting or the surface softening at spots frequently subjected to strong cleaning.
When these signs have already appeared, the first thing to do is to stop immediately the cleaning method that caused them, rather than cleaning more aggressively to hide dull or stained marks. Assessing the level of damage and the remedial option needs to rest on the actual condition of the floor — which coating, how widespread the damage is, and what loads and chemicals the area bears in operation — and should involve an experienced installer or maintenance provider inspecting directly before deciding between localised repair and wide-area treatment.
7. Checklist before each clean
- Read the label and safety documentation of the specific cleaner to be used; use only a product clearly stated as suitable for epoxy floors, checked against the TDS and SDS of that product.
- Sweep or vacuum dust, sand, and hard debris before wet mopping or running a scrubbing machine.
- Choose soft, non-abrasive tools; do not use stiff brushes, abrasive scouring pads, or sharp objects to scrape off stains.
- Trial a new chemical on a small, hidden area before using it over a wide area; do not mix several cleaners together.
- Wring the mop to just damp, do not pour water directly onto the floor; collect excess water and let the floor dry before allowing traffic to return.
- Rinse with clean water after using chemicals; clean scrubbing machine pads and wheels before bringing them into the epoxy floor area.
- Stop immediately and reassess when the floor appears dull, scratched, patchily stained, or abnormally slippery after cleaning.
Note on specifications
Kadier had not published an official TDS for its coating systems, so this article gives no technical specification, chemical resistance limit, or consumption rate specific to Kadier. Every mention of chemicals is only at the general group level, and every decision on choosing a cleaning product must be checked against the TDS and SDS of the specific cleaning product, compared with the coating system actually on the floor. When no official documentation is yet available for comparison, the safe approach is to trial on a small, hidden area and to prefer the gentlest method that can achieve cleaning.
Conclusion
Incorrect epoxy floor cleaning usually does not cause damage immediately but causes cumulative harm: strong cleaning chemicals dull and discolour the coating, abrasive tools create scratches and make the floor increasingly hard to clean, standing water and unsuitable equipment attack the weak points of the surface, and chemical residue not rinsed off makes the condition worse with each clean. Correctly identifying the group of mistakes and stopping in time is the cheapest way to preserve the floor, before damage spreads to the point of requiring major repair.
If your floor has already shown signs of damage after cleaning, or you are not sure whether the cleaning product you are using suits the coating system in place, please contact us for advice before continuing to clean over a wide area: Contact Kadier.
Illustration: Andrea Piacquadio / Pexels.
