A nano coating does not magically keep a surface clean forever. Its job is simpler and, at the same time, more interesting: to change the way water, oils or dirt interact with the surface so that it becomes easier to maintain later.
Shower glass, car paintwork, textiles, natural stone and timber are completely different surfaces. That is why one universal nano coating for everything is not a realistic solution.
It is better to start not with the word “nano”, but with three questions: what do we want to protect, what do we want to protect it from, and how will that surface be used?
A nano coating is not a shield against everything. It is a way of giving a particular surface a particular function.
What is a nano coating?
A nano coating is a product designed to modify the properties of a surface. Once dry or cured, it forms a very thin functional layer or changes the properties of the upper surface so that water, oils or dirt interact with it differently.
Some coatings remain mainly on the surface. Others penetrate into a porous substrate. Still others cure to form a ceramic- or polymer-type layer. This is why two products both described as “nano coatings” can work in very different ways.
Changes surface properties
Water may spread less, oils may adhere less strongly and the surface may become easier to clean.
A very thin layer
A nano coating is not a thick film or an additional layer of paint. The functional layer is usually very thin.
Different chemistry
Glass, textiles, stone and car paintwork require different formulations.
The result also depends on preparation
Even a good coating will not perform as intended if the surface has not been properly prepared before application.
How does a nano coating change the surface?
Water provides the easiest example.
On untreated glass, water often spreads over a larger area and remains on the surface for longer. On properly hydrophobic glass, water tends to form more defined droplets and can run off more easily.
The glass itself has not become a different type of glass. What has changed is the interaction between water and the upper surface.
| Without a coating | With a suitable nano coating |
|---|---|
| Water may spread more across the surface. | Water may form more defined droplets. |
| Dirt comes into direct contact with the surface. | Some dirt may adhere less strongly to the functional layer. |
| Cleaning may require more mechanical effort. | Routine maintenance may become easier. |
The main aim is not to create a surface that “never gets dirty”. The aim is to make it easier to maintain afterwards.
What does the hydrophobic effect mean?
A hydrophobic surface is one that water wets less easily. In practice, this usually means that water spreads less and forms more distinct droplets.
The less readily water spreads across the surface, the more pronounced the so-called “beading” effect may be.
However, a perfectly round water droplet is not a complete test of coating quality. It does not tell us:
- how long the coating will last;
- how resistant it is to cleaning chemicals;
- how resistant it is to abrasion;
- how well it has bonded to the surface;
- whether it is suitable for that particular surface;
- whether it also reduces the adhesion of oily dirt.
Water droplets look good in advertising, but a good coating should not be judged by droplet shape alone.
Why does one nano coating not suit everything?
Surfaces differ in more than appearance. Their chemical composition, porosity, surface energy, temperature, mechanical load and conditions of use can all be different.
| Surface | What is usually the aim? |
|---|---|
| Glass | Water repellency, easier cleaning and reduced adhesion of deposits. |
| Car paintwork | Hydrophobic properties, gloss and reduced impact from chemicals and environmental contamination. |
| Textiles | Slower liquid absorption and easier stain removal. |
| Natural stone | Reduced water absorption without creating a thick surface film. |
| Timber | Reduced moisture penetration while retaining behaviour suitable for the material. |
Product selection should therefore begin with the surface, not with the promise on the bottle.
Nano coatings for glass
Glass is one of the easiest surfaces on which to see the effect of a nano coating with the naked eye.
Shower glass
Shower glass is constantly exposed to water droplets, minerals, soap residue and traces of personal-care products. A suitable hydrophobic coating can reduce the adhesion of water and some contamination, making routine cleaning easier.
However, one rule is particularly important: used shower glass should be thoroughly descaled before the coating is applied. A nano coating does not hide old limescale. If deposits are coated over, they simply remain underneath the coating.
Windows
On exterior windows, a hydrophobic layer can help rainwater form droplets and run off more easily. The windows will still need to be cleaned of dust, pollen and urban contamination.
Car glass
On a windscreen, a hydrophobic effect can help water move away more quickly while driving. Good glass preparation is particularly important, as is using a product specifically intended for automotive glass.
Ceramic and graphene coatings for cars
In automotive care, the term “ceramic coating” usually refers to a protective system that cures on the paintwork and forms a very thin functional layer.
Such coatings may provide:
- hydrophobic properties;
- easier routine maintenance;
- greater gloss and visual depth;
- additional resistance to environmental contamination;
- a certain level of additional chemical resistance.
Graphene-modified coatings follow the same general principle. A graphene-related component can modify particular properties of a formulation, but the word “graphene” alone does not mean that one coating is automatically better than another.
A ceramic coating is not a paint-protection film against stone chips and it does not make car paintwork scratch-proof.
Protection for textiles and leather
A textile nano coating works differently from a coating for glass or car paintwork. The aim is generally not to create a hard surface layer.
A suitable textile protector can reduce the rate at which liquid is absorbed into the fibres, giving you more time to blot up a spill before it penetrates deeper into the material.
There is no magic here either. Coffee, red wine or oils do not become harmless to a fabric simply because it has been treated. Prompt action is still important.
On leather and coloured textiles, always test a small inconspicuous area first.
Protection for mineral surfaces and timber
Natural stone, concrete, brick and other porous materials can absorb water into their structure. Penetrating hydrophobic treatments are often used for these types of surfaces.
They do not necessarily form a visible film. The aim may instead be to modify the pore walls so that water penetrates the substrate less easily.
A similar principle is used in some timber protection systems, but timber is a material that naturally changes with moisture, so it needs a formulation designed specifically for wood.
A coating for a porous mineral surface and a coating for glossy glass may both be described as “nano”, but they perform completely different jobs.
Why is surface preparation so important?
This is where the performance of even a very good product is most often compromised.
A nano coating needs to make proper contact with the surface itself. If limescale, grease, silicone, wax, old cleaner residue or another coating remains between the new coating and the surface, the new layer may bond unevenly.
-
Remove dirt and contamination.
Grease, limescale, road film and other contamination should be removed. -
Remove old layers if necessary.
This may include wax, polishing residue or a previous coating. -
Degrease the surface.
This is particularly important on glass, paintwork and other non-porous surfaces. -
Allow the surface to dry.
Unless the instructions for the specific coating state otherwise. -
Only then apply the coating.
A clean surface allows the coating to work as it was designed to work.
If a coating does not perform as expected, the first question should not always be “is the coating bad?” It is also worth asking “how was the surface prepared?”
How should a nano coating be applied?
Application instructions vary between coatings, so the directions for the specific product always take priority over general advice.
However, several principles are common:
- do not apply the coating to a dirty surface;
- do not apply it to an excessively hot surface unless the manufacturer recommends it;
- avoid direct sunlight where it interferes with even application;
- use a small, even amount of product;
- work in manageable areas if the product reacts or dries quickly;
- remove excess product at the correct time if required;
- use clean applicators and microfibre cloths;
- follow the stated curing time after application.
More product does not necessarily mean thicker or better protection. In some cases, excess product simply leaves streaks and makes even curing more difficult.
What determines nano coating durability?
There is no single universal answer. The same product can last for different periods even on two apparently similar surfaces.
Surface preparation
Good bonding starts with a clean and properly prepared substrate.
Intensity of use
Shower glass, car paintwork and a rarely touched window are exposed to very different levels of wear.
Cleaning chemistry
Unsuitable or unnecessarily aggressive cleaners can shorten coating life.
Mechanical friction
Brushes, abrasives, automatic car washes and frequent heavy rubbing gradually wear the layer.
Environment
UV exposure, temperature, road salt, hard water and other contamination can also affect durability.
Maintenance
A properly maintained coating will generally retain its intended function for longer.
How should a coated surface be maintained?
A coating makes maintenance easier, but it does not eliminate the need for cleaning.
If limescale, grease, dust or other contamination builds up on the surface for a long time, it can mask the hydrophobic effect. This can make it appear that the coating has “disappeared”, even though it may still be functioning beneath the layer of dirt.
- use cleaners suitable for both the coating and the surface;
- avoid unnecessarily abrasive sponges and brushes;
- do not allow hard-water deposits to remain and dry on the surface for long periods;
- wash vehicles using clean tools;
- periodically carry out deeper cleaning that is still suitable for the coating;
- renew the coating according to the product instructions and its actual condition.
If water begins to behave differently on the surface, clean the surface thoroughly first. Only then decide whether the coating needs to be renewed.
Common myths about nano coatings
“The surface will never need cleaning again”
It will. A good coating can simply make that cleaning easier.
“One coating works on everything”
No. Glass, textiles, stone and car paintwork are different surfaces.
“The more water beads, the better the coating”
A strong hydrophobic effect does not describe all the properties of a coating.
“Ceramic coating removes scratches”
No. It may improve gloss and overall appearance, but it does not repair mechanical damage.
“9H means the car cannot be scratched”
No. A laboratory hardness rating is not protection against stone chips, keys or car-wash brushes.
“Nano coatings always contain nanosilver”
No. Nano coatings and nanosilver are two different things.
“Water-based means environmentally friendly”
Water-based describes the carrier in the formulation, not the complete environmental profile of the product.
“The thicker the layer, the better”
Too much product can simply make levelling more difficult and worsen the final appearance.
Read more about the difference between nanosilver and nano coatings: Nanosilver in Cleaning Products .
How to use nano coatings safely
Nano coatings are not one single chemical formulation, so their safety requirements are not identical.
Some are water-based, while others may contain organic solvents, reactive components or other substances. Safety should therefore be assessed according to the specific product, not simply the word “nano”.
- read the product label and directions for use;
- use the stated protective equipment;
- work in a properly ventilated area where required;
- avoid contact with the eyes and unnecessary spraying into the air;
- do not use the coating on a surface for which it is not intended;
- follow the product’s curing and application conditions.
Read more about labels, CLP, UFI and general rules for use: Safe Use of Cleaning Products .
How to choose the right nano coating
There is no need to begin with complicated chemistry. Start with the practical questions.
-
What is the surface?
Glass, paintwork, ceramic, stone, textile, leather, timber or another material? -
What type of protection do you want?
Water repellency, easier cleaning, reduced stain absorption, greater gloss or another function? -
Where is the surface used?
Indoors, outdoors, in a car, in a shower, in a kitchen or somewhere exposed to significant mechanical wear? -
Can you prepare the surface properly?
Sometimes cleaning is enough. In other cases, descaling, degreasing, polishing or removal of an old coating may be necessary. -
How difficult is the application?
Some coatings are suitable for straightforward household use, while others require more precision and experience. -
How will the surface need to be maintained afterwards?
A coating should make real surface care easier, not make everyday life more complicated.
The NANO GO principle is simple: first the surface and the real task, then the right coating. Not the other way round.
Frequently asked questions about nano coatings
What is a nano coating?
It is a product that modifies surface properties or creates a very thin functional layer that can change how water, dirt or other materials interact with the surface.
Can one nano coating be used on every surface?
No. Glass, textiles, natural stone, timber and car paintwork have different properties and therefore require different types of coating.
Should limescale be removed from used shower glass before coating?
Yes. Existing limescale, soap residue and other deposits should be removed before application. The coating needs to make contact with clean glass, not with old deposits.
Does a nano coating mean that the surface will no longer need cleaning?
No. A coating can reduce the adhesion of some contamination and make cleaning easier, but regular maintenance is still needed.
Do round water droplets mean that the coating is still working?
They indicate a hydrophobic effect, but droplet shape alone does not show the coating’s overall resistance or remaining service life.
Can a nano coating remove scratches?
No. It may improve gloss and appearance, but it cannot remove deep scratches or other mechanical damage.
Do nano coatings always contain nanosilver?
No. Nano coatings and nanosilver are not the same thing. Many nano coatings contain no nanosilver at all.
Is a water-based coating automatically environmentally friendly?
No. Water-based tells you about the carrier used in the formulation, but does not by itself prove an overall environmental advantage for the finished product.
How long does a nano coating last?
It depends on the specific formulation, surface preparation, application, curing, intensity of use, cleaning chemistry and environmental conditions.
How do I know when a nano coating needs to be renewed?
First clean the surface thoroughly. If the intended hydrophobic or other functional effect does not return after cleaning, it may be time to renew the coating according to the instructions for the specific product.
Official sources and further information
Choose a coating for the actual surface
Glass, car paintwork, textiles, stone and other surfaces need different solutions. Start with the surface and the result you actually want to achieve.
Explore NANO GO nano coatings