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Types of Coating

Every year the shelves gain another "revolutionary" product. Graphene, diamond, glass, titanium, nano, polymer, SiC, 9H -- the words change but the chemistry underneath rarely does. Most modern "coatings" are some form of SiO2-based liquid that cures on the clear coat, and most "waxes" are now polymer blends rather than carnauba. The labels have drifted a long way from the science.

What matters for car owners is simpler than the marketing suggests: how long the protection lasts, how it behaves in the wash bay, and how honestly the supplier describes it. The articles below cut through the jargon on each major type so you can place any product you come across into one of a handful of real categories, rather than chasing whichever headline ingredient is trending this season.

How to read the categories below

It helps to start with the one distinction that actually changes how a product behaves on your car: whether it bonds chemically to the paint, or simply sits on top of it. Everything in this section falls on one side of that line.

A true ceramic coating cures into a hard, semi-permanent film that is chemically bonded to the clear coat. You cannot wash it off; it has to wear away or be polished off. A wax or a quick-detailer spray, by contrast, sits on the surface as a sacrificial layer and is gone within weeks of normal washing. Sealants live in between -- more durable than wax, nowhere near as permanent as a coating. Almost every product name you will read about below is a variation on one of those three behaviours, regardless of what the bottle calls it.

The second thing to look at is the headline ingredient, and the second thing to ignore is also the headline ingredient. "Graphene", "diamond" and "titanium" coatings are, for the most part, SiO2 chemistry with a small additive and a big sticker. That does not make them frauds -- some of the additives genuinely change water behaviour or slickness -- but it does mean the name tells you very little about durability or finish. Read the type, not the label.

Ceramic coatings, wax and sealant

The three most-asked-about categories. Ceramic coatings are semi-permanent and cure chemically to the paint; waxes sit on top and wash off; sealants fall somewhere in between. The comparisons here explain what each one can and cannot do, and where the honest line sits between protection and gloss.

The thing people get wrong most often is expecting a wax to do a coating's job. A good carnauba or polymer wax gives a beautiful warm finish and useful beading for a few weeks; it was never meant to survive a winter of salt and jet-washes. Conversely, a coating will not make a neglected car look good on its own -- the gloss you see on a freshly coated panel is mostly the paint correction underneath, with the coating locking that finish in and making it easier to keep. We spend far more bay time on the correction stage than on laying the coating down, and that ratio surprises most first-time customers.

Coating families and brand-named types

Almost every "new" coating type on the market is a variation on the same chemistry, dressed up with a different headline ingredient. These articles explain what each label really refers to on the chemistry side, so a graphene claim or a 9H hardness number stops being a mystery and becomes something you can weigh up.

Take 9H as an example. It gets quoted as if it were a paint-protection grade, but it is a pencil-hardness test borrowed from the coatings industry, and almost every reputable ceramic on the market passes it. Quoting 9H tells you the product is a real coating; it tells you nothing about which coating is better. The same goes for "graphene": the additive can genuinely reduce water-spotting and change the way the surface sheds heat, but it sits inside a silica matrix that does the structural work. We run several of these chemistries in the workshop -- Fireball's SiO2 range, Ceramic Guard and Diamas among them -- and the differences customers actually notice are slickness, depth of gloss and how the beading ages, not the marketing tier.

Tom, our operations manager, keeps a panel of old test plates from coatings we have trialled over the years. The most instructive thing about them is how similar the two-year-old plates look regardless of which exotic ingredient was on the label: the ones that held up were the ones applied properly in a clean, temperature-controlled bay, not the ones with the most aggressive claims.

Why "hardest" and "longest-lasting" are the wrong questions

The two figures buyers chase hardest -- top pencil hardness and headline durability in years -- are the two that survive contact with reality least well. A coating's real-world life depends far more on how the car is washed and stored than on the number printed on the bottle. A nine-year coating on a car that gets brush-washed at a petrol station will be tired in two; a five-year coating on a car washed with two buckets and a soft mitt will easily see out its claim. Durability quotes are best read as a measure of the chemistry's ceiling under ideal care, not a promise.

Quick detailers, show-shine and wash-in products

The "finishing" end of the market -- sprays, wipe-ons and wash-and-wax liquids. These give short-term gloss and some hydrophobic behaviour but are not durable protection. Useful products when used honestly; often oversold.

There is nothing wrong with this category as long as you know what you are buying. A quick-detailer spray buffed over a clean panel genuinely lifts gloss and tops up beading between washes, and a decent wash-and-wax saves a step on a car that is already protected underneath. The problem is when these are sold as a substitute for protection rather than a top-up to it. A spray that lasts a fortnight is doing exactly what it should; it just is not a coating, and no amount of "ceramic" on the label changes that. We keep a couple of these on the shelf for customers who want to maintain a coated car between services, and we are upfront that they are maintenance, not armour.

Matching a product type to your situation

The right choice falls out of a few honest questions rather than a hardness chart. If you are keeping the car for years and want to wash it less often and have it stay looking sharp, a professionally applied ceramic earns its place. If you enjoy the ritual of waxing a weekend car a few times a year and like the warmth a carnauba gives, a wax is the right answer and a coating would be overkill. If the car is on a lease and headed back soon, a durable sealant or a single-stage protection step makes more sense than a multi-year coating you will never see the benefit of.

None of those answers depends on which exotic ingredient is trending. They depend on how long you are keeping the car, how you wash it, and how much of the maintenance you want to do yourself. Once you have those three answers, the category almost picks itself, and the articles above fill in the detail for whichever way you lean.

Related

  • Glossary -- full A-Z of paint-protection terms, including every coating type referenced above.
  • Ceramic Paint Protection -- the parent silo covering how these products are chosen, applied and maintained.

Authored by . Reviewed by Gary Wray. (id=5)