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Ceramic coating versus sealant or wax

Name: JetRefined
Address: Atlanta, GA, US
Telephone: (770) 999-9740
Price range: $$$

Coat it, if the paint is sound and you mean to keep the aircraft. A coating cures to a hard film bonded to the topcoat and takes the abrasion your clearcoat would otherwise take, and aerospace clearcoat is about two to two and a half thousandths of an inch that no one can add to. A sealant lasts months. A wax lasts weeks and is a photograph of a clean airframe, not a protection strategy. If a repaint is booked, wash it properly and coat the new paint instead.

The short answer

Coat paint you intend to keep. On paint already booked for the shop, wash it correctly instead and coat the new finish while it is perfect.

compared with
	Ceramic coating	Sealant or wax
Method	Wash, decontaminate, assess under proper light, correct, then a bonded film applied and cured panel by panel. Preparation is most of the work.	Applied over clean paint by hand or machine. Little preparation, no cure period, finished in a night.
Durability	Years, if it is washed with compatible chemistry and maintained. Cycles flown and de-icing exposure decide the real number.	Sealant: months. Wax: weeks, and less once de-icing fluid has been over the aircraft.
Downtime	Crew-days, and the airframe stays dry and hangared through the cure. Planned around a maintenance visit, not a turn.	Hours to an overnight. Fits between trips without planning.
Cost	The largest single appearance spend on the airframe, and most of it is preparation rather than product. Bought once, then maintained.	Recurring by design. It buys appearance for a short window, not protection across a season.
Risk	Coat over swirls, etching or oxidation and you lock them in. Undoing it means correcting the paint a second time.	Little risk and little return. Protects briefly, and can flatter a defect long enough that you stop noticing it.
Effect on later washes	Soil releases at lower pressure with less mechanical work, so every subsequent wash is gentler on the paint.	Some beading early on. No meaningful change to how hard the next wash has to be.
What a buyer sees	Three years of correct washing over a coating shows as paint with no swirl haze under daylight, which is where a walk-round forms its view.	Cosmetic, and only for the viewing. A pre-buy inspection in daylight reads straight through it.
Who it suits	Sound paint with several years left, flown often, washed often, owner keeping the airframe.	Repaint already booked, a finish too far gone to prepare, or a short remaining ownership horizon.

Three chemistries, not three grades of the same thing

A wax sits on top of the paint. The next few washes and the next few de-icing events take it off, which is why it reads as protection and behaves as a photograph. A synthetic sealant bonds to the surface properly and lasts meaningfully longer, in months rather than weeks. A ceramic coating is a different material again: it cures to a hard, hydrophobic film bonded to the topcoat, and it sits above your clearcoat as a sacrificial layer. So the choice is not between three grades of one product. It is whether the airframe has a sacrificial layer at all.

The case for a coating is not gloss

Gloss is what gets sold and it is the least interesting part. The real argument is arithmetic. Aerospace basecoat-clearcoat systems build a clearcoat of roughly two to two and a half thousandths of an inch, and there is no way to add to it short of a strip and repaint. Correction spends that film outright, and every wash and wipe-down marks and abrades a little more of it. None of it comes back. A coating puts a renewable layer in the firing line, so the abrasion of the next several years lands on the coating rather than on the clearcoat. It also makes each wash less aggressive at source, because soil releases at lower pressure and with less mechanical work.

Be sceptical of any specific number of years

Coating life on an airframe is not a fixed figure, and a number quoted to you with confidence before anyone has seen the aircraft is a sales number. It depends on cycles flown, de-icing exposure, whether the aircraft is hangared, whether it is washed with chemistry compatible with the coating, and whether the coating is maintained. A coating that is never topped up and is scrubbed with a general-purpose degreaser will not reach its advertised life, and no one refunds the difference. Ask what the maintenance interval is before you ask what the warranty says.

What a coating does not do

It is not corrosion protection. A coating sits on the topcoat of the painted exterior, and corrosion is a structural matter governed by FAA AC 43-4B, which puts inspection frequency and treatment on the operator, the manufacturer's recommendations or the operator's own program. The AC ties routine washing to removing acidic airborne contaminants, and filiform corrosion under paint is inhibited by storing below 70% relative humidity. A coating makes those washes gentler on the finish. It does not replace them, it does not reach the belly soils that trap corrosive material against structure, and it does not see what is happening under the paint.

The failure mode is coating over defects

A coating is optically clear. It does not correct, hide or improve what is underneath it. It preserves it. Swirl haze, wash marring, etched water spots and oxidation all get sealed under a hard film designed not to come off. Undoing that means removing the coating and correcting the paint afterwards, which spends clearcoat twice for one result. So correction comes first, in the same visit, or the coating does not go on. If the paint is too far gone for preparation to be worth doing, that is a repaint conversation and not a coating one.

What changes the answer

Four things move this decision. A repaint already on the calendar makes coating the current paint pointless, because the new finish is the one worth protecting. A short ownership horizon does the same. An aircraft flown weekly and washed often gains far more than one that sits hangared and moves twice a quarter, because a coating is consumed by washes rather than by months on a calendar. And whether the aircraft is washed by people using the right chemistry decides whether the coating you paid for is the coating you still have in two years.

Why the coated route costs what it does

A coating is preparation, and preparation is crew-days. Wash, decontaminate, assess the paint under proper light, correct what is correctable, then apply and cure the film panel by panel with the airframe dry and hangared throughout. That is the same tier of work as a full interior and exterior on a midsize jet, which is a five-figure job before condition or deadline are factored in. A quicker version is not the same coating done faster. It is a different product with a different outcome. The cost that decides it is the cost of doing it twice: a coating laid over defects has to be removed and the paint corrected again, and that second correction comes out of a clearcoat film you cannot add to.

Choose when

The paint is sound, the aircraft is flown often and washed often, and you intend to keep it. That combination is where a coating does the most work: every wash for the next several years is gentler, and the abrasion lands on a film you can renew rather than on a clearcoat you cannot. Correction comes first, as part of the same visit.

Choose when

A repaint is already booked, the finish is too far gone to justify preparation, or you expect to sell inside a year or two. Put the work into washing the aircraft correctly with the right chemistry until the shop date, then coat the new paint while it is perfect and has never been touched by a brush.

Questions we get on this

How many years will a ceramic coating last on a jet?: Longer than a sealant by a wide margin, and we will not put a number on it in advance. Life depends on cycles flown, de-icing exposure, whether the aircraft is hangared, and whether it is washed with coating-safe chemistry or scrubbed with a general-purpose degreaser by whoever was nearest. Maintained, it runs for years. A figure quoted before anyone has seen the aircraft is a sales figure.
Can you coat paint that already has swirls in it?: We can, and we will not. A coating is optically clear and preserves whatever is under it, so the swirls end up sealed beneath a hard film. Correction comes first, in the same visit, or the coating does not happen. Removing a coating to correct afterwards spends clearcoat twice for one result.
Does a coated aircraft still need washing?: Yes, and on the same schedule. The coating changes how the wash goes, not whether it happens: soil releases at lower pressure with less mechanical work. FAA AC 43-4B, the FAA's corrosion control guidance, ties washing directly to removing acidic airborne contaminants, and leaves corrosion inspection and treatment with the operator. Belly soils still trap corrosive material, coated or not.
Is a wax ever the right answer?: Before a viewing or a photo shoot, on paint already scheduled for the shop, yes. It will look excellent for about a week. What it will not do is carry an airframe through a winter of de-icing, and it should never be the reason a coating decision is deferred.
Does a coating help at resale?: Indirectly. No buyer pays for a coating line item. What a buyer reacts to is a walk-round in daylight where the paint has no swirl haze and the brightwork is even. Paint coated and washed correctly for three years looks it, and a pre-buy inspection reads straight through anything applied the week before.

Send the tail number, the airport and the age of the paint, and we will tell you which of the three this airframe actually needs, including when the answer is to wash it properly and wait for the repaint. Quotes are written against a defined scope, not guessed from a photograph.

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Other decisions

vs Dry wash between trips, wet wash when the soil load is heavier than film. Neither one substitutes for the other, and that line is drawn by what each method removes, not by preference. vs Rinse-less, unless the ramp allows no water or the airframe carries nothing more than a dusting. It takes a wider band of soil and it is the gentler of the two when it is done to method. Dry wash is the right answer inside its limits and a poor one outside them. vs Correct the paint only when the gauge shows the film can afford it; if a repaint is within a year or two, or the paint has already been polished more than once, live with the defects and protect what is left. vs Correct while the film is sound. Once the clearcoat itself is failing, polish is a delaying tactic and the repaint is the job you are actually buying. vs Maintenance is how you reach the repaint interval in good condition, not how you avoid it. If the paint is due, paint it. vs Keep routine washes and cabin resets in-house where your crew is trained and doing them weekly, and contract correction, coating, brightwork and recovery work out, because those are a different job to washing and the deciding factor is not skill, it is who carries the loss.

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