2026-09-29
When people look at automotive paint, they usually see only one thing: color.
A black paint looks black. A silver metallic paint looks silver. A clear coat looks transparent.
But inside every can is a carefully balanced chemical system.
Modern automotive coatings are typically built from five major groups of ingredients:
resins, pigments, fillers, solvents or water, and additives.
Each component has a different job. More importantly, the balance between them determines how the coating sprays, dries, sands, levels, protects and survives years of real-world use.
As automotive coating technology develops, however, these five categories are changing.
Today's coatings are moving toward higher solids, lower VOC emissions, waterborne chemistry, faster curing, digital color control and even formulations designed specifically for automated spraying.
So understanding what paint is made of is no longer just basic chemistry. It helps explain where the automotive refinish industry is going next.
A simplified automotive coating formulation can be represented as:
Resin + Pigment + Filler + Solvent/Water + Additives
However, the proportion of each component changes dramatically depending on the product.
A clear coat may contain no conventional color pigment at all.
A primer surfacer may contain a relatively high amount of fillers.
A basecoat may depend heavily on pigments and effect materials.
A high-solids clear coat places much greater emphasis on resin content while reducing volatile solvent content.
That is why there is no single "automotive paint formula."
Every coating is engineered around a specific job.
The resin, also called the binder, is arguably the most important structural component of paint.
Once the coating dries or cures, the resin forms the continuous film that remains on the vehicle.
It determines many of the characteristics that painters and customers actually notice:
Common resin technologies used in automotive coatings include:
Different layers require different resin properties.
For example, epoxy technology is commonly used where corrosion resistance and adhesion are important, while acrylic-polyurethane chemistry is widely used in high-performance automotive clear coats.
In older coating systems, resin selection was mainly about finding the right balance between appearance, durability and application.
Modern formulations are being pushed much further.
Manufacturers are now developing resin systems that can:
PPG, for example, has described the development of its Deltron NXT DC7020 clearcoat using AI and machine-learning-supported formulation work. The company says the product can cure in about five minutes at 140°F while reducing energy demand compared with conventional clearcoats. PPG
This tells us something important:
future resin development is increasingly about energy and process efficiency, not simply gloss.
Pigments are usually associated with color, but their role is more complex.
They can provide:
Traditional solid colors rely heavily on conventional pigments.
Modern automotive finishes may also contain:
These materials do not simply "color" the coating.
Their orientation inside the paint film affects how light is reflected.
This is why metallic colors can look different when viewed from the front and from the side.
New OEM colors increasingly use translucent, high-chroma and multi-layer effects.
That changes the way refinish technicians must work.
PPG notes that some newer translucent OEM finishes require a different approach from the traditional "spray to full hiding" method. The undercoat shade can contribute directly to the final appearance, meaning painters may need to spray to a visual match rather than simply maximum opacity. PPG
This is a significant change.
It means:
the final vehicle color is increasingly created by the interaction between multiple coating layers, rather than by the basecoat alone.
For automotive refinishers, understanding pigment behavior is therefore becoming just as important as knowing the formula.
Fillers are usually mineral or functional particles added to coatings.
Their main purpose is not necessarily to create color.
Depending on the coating, fillers may help:
They are particularly important in:
However, more filler does not automatically mean better performance.
The balance between filler and resin is critical.
Too much filler can negatively affect properties such as:
This is why premium clear coats typically rely much more heavily on resin chemistry than on filler content.
The liquid phase makes the coating sprayable.
Traditional automotive coatings rely primarily on organic solvents.
Their job is to:
After spraying, much of the solvent evaporates.
That is one reason solvent selection has such a strong influence on the final appearance.
A thinner that evaporates too quickly can reduce leveling.
A reducer that is too slow may increase the risk of solvent retention in certain conditions.
Using unsuitable industrial thinner can also interfere with curing and long-term gloss.
Environmental regulations have pushed the industry toward lower VOC emissions, particularly in developed markets.
Waterborne technology replaces a significant proportion of organic solvent with water as the carrier phase.
But today's waterborne systems are no longer marketed only as an environmental solution.
They are increasingly designed around:
PPG launched its Quickline waterborne refinish system in the U.S. and Canada in 2026, highlighting reduced VOC emissions alongside fast drying, blending capability, metallic control and color accuracy. PPG新闻
That reflects an important shift:
waterborne technology is moving from regulatory compliance toward complete workshop productivity.
Additives usually represent only a small part of the total formulation.
But their influence can be enormous.
Common coating additives include:
These materials can determine whether the coating behaves predictably in the real world.
For example, the difference between:
may be influenced by additives used at very low concentrations.
This is one of the reasons formulation development is much more complex than simply mixing resin, pigment and solvent together.
| Component | Main Function | Strong Influence On | Modern Development Direction |
|---|---|---|---|
| Resin / Binder | Forms the cured coating film | Adhesion, hardness, gloss, durability | High solids, low-temperature cure, stronger UV resistance |
| Pigment | Provides color and visual effect | Hiding, color accuracy, metallic/pearl appearance | High-chroma, translucent and complex effect colors |
| Filler | Builds body and controls physical properties | Film build, sanding, cost, strength | Functional fillers and better resin/filler balance |
| Solvent / Water | Controls viscosity and application | Atomization, leveling, flash time | Lower VOC, waterborne, optimized evaporation |
| Additives | Fine-tune coating behavior | Flow, UV protection, settling, foam, cure | More specialized functional additives |
The five basic groups still exist.
What is changing is the proportion and sophistication of each group.
Several trends are especially important.
One of the clearest trends is the growth of HS and UHS coatings.
The goal is simple:
leave more useful coating film on the vehicle while releasing less solvent into the atmosphere.
In older solvent-heavy formulations, a large percentage of what leaves the spray gun eventually evaporates.
High-solids technology aims to increase the proportion that remains as the finished film.
This can potentially improve material efficiency while helping manufacturers meet VOC requirements.
For body shops, however, higher solids also change application behavior.
Painters need to pay more attention to:
So higher solids does not simply mean "thicker paint."
It means a different formulation and application strategy.
Traditionally, paint chemistry and color software were two separate things.
That distinction is disappearing.
Modern automotive refinishing increasingly connects:
spectrophotometer → color database → formula → automatic mixing machine
PPG's LINQ ecosystem combines digital color tools and automated mixing, while Axalta's Irus system connects scanning, formula retrieval and hands-free mixing. PPG
At Automechanika Frankfurt 2026, Surventis also presented its Refinity Digital Color Process around the idea of scan, match and automated mixing. Automechanika Frankfurt
The chemistry still matters.
But increasingly, the value of a tinting system lies in:
the paint + data + software + hardware + workflow.
From a distributor's perspective, this may become one of the biggest changes in automotive refinish over the next decade.
Robotic spraying places different demands on coatings.
A highly experienced painter can compensate for small differences in viscosity, spray behavior or flash characteristics.
Automation expects repeatability.
This means coating manufacturers must increasingly control:
Axalta's EcoNextJet system goes even further. It combines specialized jettable automotive coatings with robotics and printhead technology to enable digital, drop-on-demand exterior finishing. Axalta says the system required new polymers, dispersions and rheology concepts to make automotive coating suitable for this type of precision application. Axalta Coating Systems Ltd.
That is a major conceptual shift.
Paint is no longer always designed around a spray gun.
Some future coating systems may be designed around digital deposition equipment from the beginning.
Automotive paint used to be judged mainly by:
Those functions remain essential.
But modern coating development increasingly includes additional functionality.
PPG has highlighted technologies intended to support radar sensing, electrical functionality and other advanced vehicle requirements. PPG
As vehicles become more connected and autonomous, exterior coatings may need to interact with:
That means future pigment and resin selection may be influenced not only by appearance but also by how electromagnetic signals pass through or interact with the coating.
Sustainability used to be discussed mainly around VOC.
Now the calculation is broader.
A coating may be considered more efficient if it:
Axalta notes that body shops increasingly look for products that combine productivity with environmental performance, including waterborne and high-solids solventborne systems. Axalta Coating Systems Ltd.
This is an important distinction.
The "greenest" paint may not simply be the one with the lowest solvent content.
A product that dramatically reduces curing energy or repainting waste may have significant environmental and economic benefits as well.
From our perspective, automotive coating development is moving away from maximizing one property.
A formulation with extremely fast curing is not useful if it becomes difficult to spray.
A very high-solids clear coat is not valuable if painters cannot control its film build.
A very low-cost primer is not economical if it increases rework.
The best modern coatings increasingly need to balance:
Performance + Application + Productivity + Regulation + Cost
That balance will be different in every market.
European body shops may prioritize:
Tropical markets may care more about:
High-UV markets may prioritize:
Price-sensitive markets may still prefer solventborne and MS systems because the total investment is lower.
There will therefore probably not be one global coating technology that replaces everything.
Instead, successful manufacturers and distributors will need to understand which formulation makes sense for which market.
When comparing coatings, buyers should avoid evaluating only price per liter.
Useful questions include:
| Question | Why It Matters |
|---|---|
| What resin technology is used? | Strongly affects durability and curing |
| What is the solids content? | Helps understand film build and solvent content |
| Is it waterborne or solventborne? | Affects regulation, application and equipment |
| What reducer system is required? | Influences leveling and climate suitability |
| What is the recommended film thickness? | Important for durability and appearance |
| What are the flash and drying times? | Directly affects workshop throughput |
| What is the mixing ratio? | Essential for curing consistency |
| Is the product designed as part of a complete system? | Reduces compatibility risk |
| What climate is it intended for? | Temperature and humidity affect application |
| Is color data and digital support available? | Increasingly important for professional tinting systems |
Most automotive coatings contain a resin or binder, pigments, fillers where required, solvent or water, and specialized additives.
There is no single most important component, but the resin largely determines the structure and many long-term performance characteristics of the cured coating.
Most standard clear coats contain little or no conventional color pigment, although they still contain resin, solvents and specialized additives such as UV stabilizers.
Fillers help build film thickness, improve sanding and control mechanical and application properties.
They allow a greater proportion of the sprayed material to remain as the finished coating film while reducing the relative amount of volatile solvent.
Not automatically. They have different advantages and application requirements. Waterborne technology is particularly important for VOC control, while solventborne systems remain widely used in many markets.
Very likely. Automated application requires more predictable viscosity, rheology, atomization and curing behavior, which will place greater emphasis on formulation consistency.
Automotive paint may look simple from the outside.
Inside the can, however, it is a carefully engineered balance between:
resin, pigment, filler, liquid carrier and additives.
And that balance is changing.
Modern automotive coatings are becoming:
For us, the most interesting change is not any single new ingredient.
It is the fact that paint chemistry is becoming part of a much larger repair technology system.
The future automotive coating supplier will not only need to manufacture good paint.
It will increasingly need to understand:
chemistry, climate, application, digital color management, workshop economics and automation.
That is where we believe automotive refinishing is heading.
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