Clay & Coat

Coatings, Sealants & Wax

The protection step — ceramic coatings, sprays, sealants and wax — compared on stated SiO2, rated durability and what a bottle actually protects.

Protection is the last step of a detail, and the one where the marketing is loudest. “Ceramic” now appears on everything from a genuine multi-year coating you cure onto the paint to a $15 spray that’s really a sealant. The job of this section is to cut through that: what each type of protection actually does, how long it really lasts, and what a bottle costs you per coat.

Think of protection as a ladder. A wax gives warm gloss for a few weeks. A synthetic sealant lasts a few months and beads well. A spray SiO2 coating adds real hydrophobic slickness for weeks to months with almost no technique. A true ceramic (or graphene) coating chemically bonds to the clear coat and protects for years — but only if you prep properly and take your time. None of them is scratch-proof, and none replaces washing; what they buy you is easier washing, water that sheets off, and a deeper shine.

Everything in Coatings

How to choose your protection

Match the product to your patience, not to the biggest number on the label. If you want years of protection and you’ll do the prep — a proper wash, a clay-bar decontamination, and ideally a light polish— a true coating earns its price. If you want beading this weekend with zero risk of high spots, a spray-on SiO2 is the smarter buy, and you simply top it up more often. And if you just want a warm shine you can lay on over a Sunday afternoon, a good car waxis the low-commitment classic. There is no wrong answer here, only the one that matches how much time you’ll actually spend.

Prep is 90% of the result

Every coating locks in whatever is underneath it. Skip the wash and decontamination and you seal dirt and swirls under a layer that now lasts for years — the opposite of what you wanted. Whatever you choose, clean and smooth the paint first. Our best ceramic coating guide ranks the DIY options, and is a coating worth it? helps you decide before you spend.

What decides durability

Two cars with the same coating can get very different lifespans. Maintenance is the difference: a pH-neutral wash keeps a coating hydrophobic for its rated life, while harsh cleaners and automatic brush washes strip it early. We break the numbers down in how long a coating lasts.

Frequently asked questions

What's the difference between a wax, a sealant and a ceramic coating?

It's mostly durability and chemistry. Wax is a natural or synthetic gloss that lasts weeks. A sealant is a synthetic polymer that lasts a few months. A ceramic coating is a SiO2-based layer that chemically bonds to the clear coat and lasts years. The longer-lasting the protection, the more prep and care it wants in return.

Do coatings make a car scratch-proof?

No. A coating adds a hard sacrificial layer that resists light marring and chemical etching and makes washing easier, but it will not stop rock chips or a careless automatic wash. Anyone selling a coating as scratch-proof is overselling it.

Can I put a coating over wax?

No — a true coating needs to bond to bare, decontaminated clear coat, so any wax or old sealant has to be stripped first. Spray SiO2 products are more forgiving and can layer over each other, but even they work best on clean paint.

Sources

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