How a PPF topcoat can influence stain release, clarity, installation and long-term care.
Paint protection film, usually called PPF, is a flexible layer applied over vehicle paint. A ceramic coating is a surface treatment that can be applied to a compatible surface to change characteristics such as water wetting and ease of cleaning. A PPF product can also have a factory-applied topcoat. For a film manufacturer, the most useful question is what that topcoat adds to the finished film and how it holds up through installation and daily driving. [1] [2]
Nanize develops PFAS-free polysilazane coatings and publishes technical work on treated thermoplastic polyurethane, or TPU, films. The company reports marker-removal results on selected coated TPU samples. Those results are a starting point for automotive film suppliers evaluating a coating for easier care. The film, adhesive, topcoat and production process need to be evaluated as a complete construction. [3] [4]
How Paint Protection Film and Ceramic Coating Differ
Automotive PPF is commonly sold as a transparent protective film. The film and adhesive help create a physical layer over the paint. A ceramic coating applied directly to a car is typically a much thinner surface treatment. Vehicle owners comparing the two may care about stone chips, staining, gloss or wash effort. The product type matters because those jobs are addressed by different parts of the protection system. [2] [5]
In one published example, 3M describes a paint protection film with polyurethane layers and a pressure-sensitive adhesive. Other film products may differ in construction. The outer clearcoat interacts with water, oils, dirt and cleaning materials. The film beneath it contributes to flexibility and physical protection. The adhesive is what attaches the construction to the paint. Each layer can affect what installers and owners notice. [1]
Manufacturers may use the word coating for several steps. A converter may apply a finish during film production. An installer may apply a separate product after installing a finished film if the film supplier supports that combination. A vehicle brand may also specify a coating on molded trim at the factory. Identifying the application step early helps avoid comparing products that serve different parts of the market.
The phrase self-healing is also product-specific. Some commercial films describe recovery of minor surface marks under conditions identified by the supplier. An easy-clean finish is evaluated for how soils or marks release. A hydrophobic finish is evaluated for water behavior. A film brand can state which property it is targeting and ask for evidence tied to the finished film, including what happens after exposure and cleaning. [2] [5]
What a TPU Film Topcoat Can Change
The outside of the film sees the full range of residues the vehicle encounters. Insects, road grime, tree deposits, mineral spotting and shop handling can affect appearance. A topcoat can be designed to make certain residues easier to remove. The buyer should define which residues matter most, how long they stay on the film and what cleaning method customers are expected to use.
Water beading is one visible characteristic. It can be helpful when a brand wants to describe how a film interacts with rain or wash water. Stain resistance and stain release require separate observations. A residue that lifts during a controlled wipe is different from one that leaves discoloration or a change in gloss. A useful qualification program measures the outcome the vehicle owner will see.
Clarity and appearance are central for transparent film. A clear product can change the appearance of dark or metallic paint if it adds haze, gloss variation or visible texture. A matte or satin film has a different target, and a topcoat that looks good on a gloss film may affect that target. Test the finish against the film style and paint colors for which the product will be sold.
Installation can be as important as appearance. A film is commonly positioned and shaped around curves, edges or recesses. The topcoat needs to remain acceptable through the deformation expected for the intended use. An installer can document how the sample handles on representative panels, while the lab evaluates whether the same deformation changes clarity, surface uniformity or cleanability.
What Nanize Has Published on Coated TPU
Nanize’s technology page describes non-marking performance on TPU, including removal of marker ink from treated samples. It also discusses work on selected optical polymers. A marker result is useful because it demonstrates interaction with a defined kind of contaminant. For an automotive film brand, it helps identify a candidate for broader tests that match what the film will encounter on the road. [3]
A candidate film can be compared with the converter’s current topcoat. Use the same underlying film construction wherever practical and record preparation, cure and sample history. Choose the road soils and cleaning products that represent the intended market. An initial comparison can include marks that are normally easy to remove as well as a residue the customer has difficulty removing from its current film.
Check the finish before and after weathering and cleaning. A new sample can look very different from an installed film after sunlight, washing and daily contact. An evaluation can track whether the candidate keeps its original color, gloss and haze, whether it still cleans easily and whether the coating shows changes around stretched or frequently handled areas. The customer’s warranty and product specification help set the thresholds.
Nanize reports rapid, low-temperature curing for selected coatings and identifies automotive plastics among its published uses. A converter can ask the technical team how a candidate finish would be applied and cured on the actual web. A low-temperature result on one substrate is useful context for discussing a trial. The intended film and adhesive stack establish how much heat and handling the process can tolerate. [3] [4]
How a Film Converter Can Qualify a New Topcoat
Evaluate the finished construction
Start with the intended base film, adhesive and any release liner or protective cap sheet used in production. The coated product will be wound, stored, unwound and applied. A new surface can influence the way those materials separate or contact each other. The converter can inspect the film after normal storage and compare handling with the current product.
Consider the points in the process at which a defect could be introduced. An uneven application can show up as visible bands. Contact during winding can leave marks. A thickness change can affect appearance on some substrates more than others. Recording when and where a defect appears can help the converter distinguish between a chemistry issue and an equipment or handling issue.
Measure optics and installation behavior
Compare clear versions for properties such as haze, luminous transmittance and gloss, using methods appropriate to the film construction. ASTM D1003 provides a method for haze and luminous transmittance of transparent plastics. Record sample thickness and the way the film is supported during measurement. For matte finishes, use a comparison that reflects the brand’s expected texture and appearance. [6]
Give installers samples with enough area to cover the shapes that matter. A flat panel can reveal surface uniformity. A curved panel can show how the finish changes where the film is stretched or manipulated. Record the appearance immediately after installation and after the expected stabilization period. Ask the installer to identify where a change in feel or handling would create extra labor.
Validate cleaning and weathering together
Choose exposures that represent the customer’s climate and maintenance habits. A laboratory weathering method can give useful comparative information, and outdoor or vehicle evaluations can show how the finish behaves through real conditions. SAE J2527 is one example of a controlled xenon-arc exposure method for automotive exterior materials. The customer and lab can select the program appropriate to the application. [7]
For a film sold in several climates, record which exposure supports which claim. A film tested in a hot, sunny market may also need evidence for frequent washing or cold-season road residue. Use those conditions to choose a second trial if the first result supports a broader launch with a local installation partner.
Retest cleanability after the exposure. Compare the candidate and reference for the amount of effort needed to remove defined residues and the appearance after cleaning. Inspect the sample at folds, edges and high-contact areas as well as across the center. Where the film already has a marketed property such as minor mark recovery, include the relevant acceptance test in the program.
Test production yield at the line
A pilot roll can reveal variations that a small sheet will miss. Inspect samples across the width and from several points along the roll. Record application and cure conditions, defects and the amount of material accepted after inspection. If the converter expects to switch between gloss and satin films, include an evaluation of how the line changes over between products.
Repeat the evaluation at the line speeds the converter expects to use. Measure the temperature the film experiences and check that the film can enter later operations without marking. A short cure can be valuable when it fits the production process and supports a repeatable finish. The cost comparison should include preparation, inspection and material that fails the appearance specification.
Where Else Automotive Manufacturers Can Evaluate Coatings
Molded exterior trim offers another candidate surface. A trim supplier may be dealing with scratches, marking or a change in gloss after cleaning. It can assess a finish on representative parts for adhesion, color and appearance after weathering. Complex shapes need evidence from the places that are hardest to coat, such as edges and recesses.
High-touch interior pieces have different priorities. A supplier may want to make fingerprint marks less visible on a glossy panel. It can compare the film or part after repeated wiping with the cleaning products the brand expects users to apply. Appearance and feel can both matter. A surface that seems easy to clean in the lab may still require changes to meet the finish expected in the vehicle.
Some vehicle parts have optical or safety-related specifications that go beyond appearance. Any proposed change to a component with those responsibilities belongs in the manufacturer’s qualification process. The supplier can start with a decorative or easily sampled part while it builds evidence about process control and durability. The final decision belongs with the teams responsible for the component and its specification.
For aftermarket businesses, the installation and maintenance experience can provide valuable feedback to film developers. A professional installer can report which surfaces are difficult to keep presentable, which residues cause repeat visits and how a film behaves after customers follow the published care instructions. A converter can use that feedback to prioritize the product features it evaluates first.
How to Build the Business Case for a Film Finish
Give each partner a measurable outcome. A converter may care about accepted square meters per roll. A distributor may care about the rate of returns tied to appearance. An installer may care about time spent cleaning or reworking visible areas. The vehicle owner may care about maintaining the desired look with a routine wash. A development brief can specify which of those outcomes the topcoat is meant to improve.
Consider an illustrative converter producing 10,000 square meters of a particular film in a period. If a process change reduced finish-related scrap from 1 percent to 0.5 percent, it would recover 50 square meters. At an assumed material value of $8 per square meter, the direct material difference would be $400 for that period. The converter would still compare coating cost, line time, inspection and handling. These hypothetical figures illustrate how a converter can value recovered yield.
The larger value may be somewhere else. A product that shows fewer permanent marks after ordinary care might reduce customer complaints. A more consistent finish might make inspection easier or allow more accepted rolls from the same equipment. Estimate the value only after measuring which effect occurs. The teams that sell and install the film can help determine whether the measured improvement matters to customers.
Set the purchasing decision before a large pilot. Agree on the reference film, appearance limits and required service exposures. Define what would count as a meaningful cleanability or yield improvement. Decide who will review the results, including the buyer, converter, quality team and any installation partners. A clear decision gives everyone a reason to collect the same information.
What Installers and Vehicle Owners Can Ask About a Film
Start with the exact film model and the finish it is meant to deliver. Two clear films can have different construction, warranty and care requirements. The model name lets a customer find the supplier’s information and ask which treatments are compatible. A conversation with the installer is also an opportunity to identify the parts of the vehicle that see the most debris, washing or visible handling.
For a buyer who values ease of care, ask what residues the supplier evaluated and how it assessed their removal. A demonstration with water may show beading. A sample exposed to a representative soil gives information about how the surface cleans. Ask how the finish performs after exposure and what routine the supplier recommends. Those details are useful when choosing between a factory finish and an additional treatment.
People shopping for ceramic coating versus PPF may be trying to solve more than one problem. Specify which outcome matters most for each surface. Physical protection on a heavily exposed panel, maintenance on a large painted area and preservation of a matte finish are different priorities. A qualified installer can explain which products are available for the vehicle and which combinations the product suppliers support.
From an Approved Sample to Repeatable Film Supply
For a converter, an accepted sample should come with production information that can be repeated. Identify the base film and adhesive construction, the topcoat grade and the approved appearance reference. Record the parts of the process that affect the result, including the position in the roll and any relevant storage time. When a customer later reports variation, those records give the supplier a way to trace the issue.
Define a practical incoming and outgoing inspection. Some buyers may compare gloss or haze on representative samples. An installer may look for the kind of texture, optical distortion or edge behavior that appears on painted panels. Use both laboratory measurements and agreed visual references where they help the parties make the same judgment. Record which conditions trigger a review before more rolls are shipped.
A film buyer can also ask for samples after the new finish has been processed and packed on the commercial line. That captures handling that may be absent from a development run. Include a discussion about how suppliers will communicate changes in coating, film or adhesive. A material substitution can affect appearance or installation even when the finished roll carries the same product name.
The development team can keep the marketing claim proportional to the evidence. A result for a particular marker or soil can be described with its cleaning method and the film grade tested. A durability claim should reflect results after the relevant exposures. A clear product description gives installers information they can use when explaining the finish and its care to vehicle owners.
The Nanize Team and Automotive Coating Partners
Jerry Stokes, Chief Commercial Officer, works with prospective customers and partners. For an automotive film or trim project, he is a point of contact for defining the application, intended market and commercial decision. Dr. Kingsley Iwu, CTO and co-founder, leads the scientific work behind the coating formulations and cure. A joint evaluation gives both teams a clear target based on the customer’s material and service needs. [8] [3]
CEO David Hogg brings experience moving industrial technologies toward manufacture. CFO and co-founder Håvard Lillebo contributes the finance perspective on pilots and scale-up. A converter, coating applicator or component supplier can bring its own line and quality requirements. A well-defined project links the formulation and production decisions to the properties the vehicle brand or aftermarket customer values. [8]
Frequently Asked Questions About PPF Coatings
Can a ceramic coating go on top of PPF
Some suppliers describe compatible combinations for their specific film and coating products. The film maker’s instructions, care requirements and warranty determine what applies to a particular product. A factory topcoat is part of the film construction and is evaluated during development. An installer-applied treatment is a separate product choice. [5] [2]
Is hydrophobic PPF easier to keep clean
A hydrophobic surface changes how water wets the film. Cleaning effort also depends on the residue, the finish and the method used to remove it. A brand can support an easy-clean claim by testing representative soils on the finished film after weathering and cleaning. Water behavior can be one part of that evaluation.
Is every PPF made with the same kind of TPU
Paint protection films vary in construction, and polyurethane products can use different materials and finishes. For qualification, ask for the film grade and intended outer finish, along with information on the adhesive, thickness and installation conditions. Compare performance on the exact film the converter plans to sell. [1] [2]
What does PFAS free mean for an automotive film
Ask whether the claim describes the topcoat, the entire film construction or another part of the product. A converter can collect material information from the suppliers of the film, coating and adhesive. The evidence can then be matched to the claim the product brand intends to make. [9]
Can Nanize supply samples for a specific automotive application
The company invites application inquiries involving its coating technology. A useful starting point is the current film or part, the desired appearance, the service exposures and the result the customer wants to improve. Nanize and the prospective partner can discuss whether a representative test or line trial is appropriate. [10] [4]
Discuss Automotive Coating Development With Nanize
Nanize welcomes vehicle manufacturers, Tier 1 suppliers, PPF and TPU converters, applicators, distributors and investors interested in functional automotive surfaces. It also welcomes relevant industry event invitations. Contact Jerry Stokes at js@nanize.com with the part or film, the current finish and the performance target. [10] [8]
Sources
1. 3M paint protection film construction data sheet
2. XPEL guidance on paint protection film and ceramic coatings
3. Nanize coating technology and test results
4. Nanize coating applications
5. 3M guidance on film and coating compatibility
6. ASTM D1003 for haze and luminous transmittance of transparent plastics
7. SAE J2527 for accelerated exposure of automotive exterior materials
8. Nanize executive team and business contacts