Ceramic coatings have moved from the automotive world into business aviation over the past decade, and the question now is not whether they work but what they actually do on an airframe. A ceramic coating is a liquid polymer—typically based on silicon dioxide (SiO₂) or silicon carbide (SiC)—that bonds chemically to paint and cures into a hard, hydrophobic layer a few microns thick. It reduces the frequency of washing, adds gloss, and offers a measure of protection, but it is not a substitute for paint correction, it does not prevent corrosion, and it wears away faster than most operators expect.
What does a ceramic coating actually protect against?
A cured ceramic layer performs three jobs. First, it creates a hydrophobic surface: water beads tightly and rolls off, carrying loose dust and light soiling with it. Second, it resists bonding by organic contaminants—bug strikes, exhaust residue, light oil mist—so they sit on the surface rather than etching into the clearcoat. Third, it provides a sacrificial barrier against UV degradation and minor abrasion, though the effect is modest compared to the underlying clearcoat.
What it does not do:
- Stop corrosion: Ceramic coatings sit atop the paint; they do nothing for the aluminium or composite structure beneath, and any existing corrosion or paint defect will continue to spread underneath.
- Fill scratches or swirls: The coating follows the surface profile. If the paint has not been polished to remove oxidation and marring, the ceramic layer will lock in those defects under a glossy finish.
- Eliminate the need for decon: Brake dust, de-icing fluid, and mineral deposits still accumulate and must be removed with a clay bar or chemical decon before recoating.
- Protect against impact: Stone strikes, hail, and leading-edge erosion will damage both the coating and the paint beneath it.
The European Union Aviation Safety Agency (EASA) and the FAA do not regulate the application of ceramic coatings—they are considered a maintenance activity, not a modification—but any product applied to an airframe must not interfere with markings, static ports, or pitot probes, and the tech log should note the application and product used.
How long does it last in service?
Manufacturers of aviation-grade ceramic coatings—such as Aeroglaze, AvalonKing, and Gyeon—quote durability of 12 to 36 months, but that figure assumes ideal conditions: hangared storage, infrequent flight, temperate climate, and no de-icing fluid exposure. In European charter and managed-fleet operations, real-world durability is shorter.
| Factor | Effect on coating life |
|---|---|
| Frequent flight (>200 hrs/year) | Reduces life by ~30% due to rain, insects, leading-edge abrasion |
| Outdoor parking | UV and thermal cycling degrade the polymer; expect 12–18 months maximum |
| Winter operations with Type I/IV fluid | Glycol-based fluids soften and strip coatings; recoat after each season |
| Rinseless or waterless washing | Preserves coating; traditional pressure washing accelerates wear |
A coating is considered spent when water no longer beads tightly and contamination begins to bond to the paint. At that point, a single-stage polish and fresh application are required. Attempting to top up a worn coating without paint correction traps contaminants and creates an uneven finish.
Does it reduce turnaround time between flights?
Yes, modestly. A well-maintained ceramic coating allows a dry wash or rinseless wash to remove light dust and fingerprints in 45–60 minutes for a super-midsize aircraft, compared to 90 minutes for a traditional soap-and-rinse wash. The hydrophobic effect means less scrubbing and faster drying, which matters when you have a narrow slot and limited apron access.
However, the coating does not eliminate the need for a full decon and polish every 12–18 months, and it offers no advantage in an AOG situation where the aircraft is heavily soiled—brake dust and de-icing residue must still be chemically removed, and that takes the same time whether the paint is coated or not.
What preparation does the paint need before application?
Ceramic coatings bond only to clean, defect-free paint. The process is sequential and cannot be shortcut:
- Wash and decon: Remove all surface contamination with a pH-neutral soap, clay bar, and iron-remover if the aircraft operates from airports with significant brake-dust exposure (common at high-traffic FBOs).
- Paint correction: Machine-polish with a single-stage compound to remove oxidation, swirls, and light scratches. This step restores gloss and ensures the coating bonds to healthy clearcoat, not to a degraded surface.
- Panel wipe: Use an isopropyl alcohol (IPA) solution (typically 10–15% IPA in distilled water) to strip any polish oils and residual contamination. The surface must be completely clean at a molecular level.
- Application: Apply the ceramic product in a climate-controlled environment or, if on the ramp, when the airframe is not cold-soaked and ambient temperature is above 10 °C. Most products cure in 12–24 hours and reach full hardness in 7 days; the aircraft should not be washed during the initial cure.
OEM guidance from Gulfstream, Bombardier, and Dassault does not specifically address ceramic coatings, but their paint-care manuals universally prohibit abrasive compounds and require that any aftermarket product be tested on a hidden panel first. Textron Aviation's maintenance manual for the Citation Longitude, for instance, specifies that only pH-neutral cleaners and soft cloths be used on painted surfaces, and that any coating must not obscure registration marks or interfere with inspection access panels.
Can it be applied to the entire aircraft, including brightwork and transparencies?
No. Ceramic coatings are formulated for painted surfaces only. Applying them to polished aluminium brightwork—nacelle rings, window frames—will create a hazy film that is difficult to remove and will dull the metal. Brightwork requires dedicated metal polish and, if desired, a separate sealant designed for bare aluminium.
Transparencies (windscreens, cabin windows) must not be coated with paint-grade ceramic products. The chemistry can interfere with anti-reflective and heated-window coatings, and any defect in a windscreen coating can create optical distortion. PPG Aerospace, which supplies transparencies to most OEMs, publishes a list of approved cleaners and explicitly prohibits aftermarket sealants unless tested and approved for aviation glazing.
Composite fairings, radomes, and control surfaces can be coated, but the radome must be tested after application to ensure the coating does not attenuate the weather radar signal—this is rare, but it has occurred with thick or metallic-particle coatings not intended for aviation use.
How Terso applies ceramic coatings on the ramp
We perform paint correction and ceramic application airside across Europe, working within the aircraft's schedule and the FBO's slot constraints. The process includes full decon, single-stage machine polish, IPA wipe, and application of aviation-grade SiO₂ ceramic, with a minimum 12-hour cure before release. Details and lead-time requirements are on our paint protection service page.
Sources
- EASA Part-M Continuing Airworthiness Requirements
- Gulfstream G650 Airplane Flight Manual – Exterior Cleaning and Care
- PPG Aerospace Transparencies Cleaning and Maintenance Guide
- Textron Aviation Citation Longitude Maintenance Manual – Paint and Finish Care (Chapter 51)
- Gyeon Aviation Ceramic Coating Technical Data Sheet
- FAA Advisory Circular 43-4B – Corrosion Control for Aircraft