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Gyeon
A Korean coatings brand that built its reputation on high-solids SiO2 ceramics with strong water behavior and a forgiving, enthusiast-friendly application window. Quartz and Mohs are its best-known consumer layers.
Best for: Detailers and confident DIYers who want maximum gloss and slick, self-cleaning water behavior on a clean paint correction
Roughly $60–$150 for a 30–50ml bottle (Quartz / Mohs / Pro); full kits $80–$200+
- Owners consistently praise the deep, wet gloss and candy-like reflectivity it leaves on dark paint
- Strong hydrophobic sheeting and self-cleaning behavior reported to hold well through the first year
- More forgiving flash and wipe-off window than many rivals, which lowers the risk of high spots for first-timers
- Broad product ladder (Can Coat entry spray, Mohs, Pro, Syncro) lets you match durability to budget
- Included applicators and suede cloths in the retail kits are well regarded, so you buy fewer extras
- Real-world durability leans toward the 1–2 year end unless you use the pro-only tiers
- The very slick surface can be finicky about topper compatibility if you layer other brands
- Fewer certified-installer options in the US than the biggest rivals, so warranty-backed pro jobs are harder to find
- Batch-to-batch flash time varies, so owners recommend a test panel every time
Gtechniq
A British coatings brand with a chemistry-forward reputation, best known for the pro-grade Crystal Serum line and the consumer C2/EXO toppers. It targets long, warranty-backed durability over easy application.
Best for: Owners who want the longest verified durability and a certified-installer warranty, and DIYers comfortable with a tighter application window
Roughly $50–$120 for consumer bottles (Crystal Serum Light, EXO); pro Crystal Serum Ultra is installer-only
- Crystal Serum Ultra carries a widely cited 9-year durability claim when applied by an accredited detailer
- One of the largest certified-installer networks, so a warranty-backed professional coating is easy to source
- EXO topper is a favorite for adding extra water-repellency and chemical resistance over a base coat
- Consensus among detailers is that the hardness and chemical resistance are genuinely top-tier
- Consistent, well-documented layering system (Serum + EXO) that pros trust for repeatable results
- Crystal Serum Light and the pro tiers flash fast and punish slow wipe-off — less beginner-friendly
- The strongest, longest-lived layer (Crystal Serum Ultra) cannot be bought or applied at home
- Some owners find the gloss slightly less "wet" out of the bottle than Gyeon on very dark paint
- Premium pricing, especially once you add EXO and pay for professional installation
How they score, side by side
Scores reflect aggregated owner reviews and expert consensus — not our own bench testing.
- Gloss / wet look98
- Top-tier durability710
- DIY application ease86
- Hydrophobic performance99
- Installer / warranty network69
- Value for money87
Spec-by-spec comparison chart
| Factor | Gyeon | Gtechniq |
|---|---|---|
| Coating chemistry | High-solids SiO2 (silica quartz) | SiO2-based, high-hardness silica |
| Flagship consumer layer | Quartz / Mohs (~2 yr class) | Crystal Serum Light (~5 yr class) |
| Flagship pro layer | Syncro / Pro (installer) | Crystal Serum Ultra (installer-only) |
| Claimed durability (top tier) | Up to ~5 years (pro tiers) | Up to 9 years (Ultra, pro-applied) |
| Application forgiveness | More forgiving flash & wipe window | Tighter window; flashes fast |
| Gloss character | Very wet, deep, candy-like | Glossy but slightly harder/sharper look |
| Hydrophobic behavior | Strong sheeting & self-cleaning | Strong, boosted further with EXO topper |
| Best-known topper | Can Coat / Cure | EXO (extra water & chemical resistance) |
| US certified-installer network | Smaller | Large & well established |
| Consumer price (per bottle) | ~$60–$150 | ~$50–$120 |
| DIY difficulty | Beginner–intermediate | Intermediate–advanced |
Our Top 3 Picks
The three highest-rated options in this category, if you'd rather skip straight to a proven pick.
Best for DIYers who want the wettest gloss with a forgiving application window
- High-solids 9H SiO2 ceramic
- Deep, candy-like wet gloss
- More forgiving flash & wipe-off
- ~18 months+ of protection
Why buy it: Gyeon's flagship consumer coating — the best-looking, lowest-risk DIY ceramic for most enthusiasts.
Best for owners chasing the longest verified consumer durability and hardness
- Up to ~5 years of protection
- Top-tier hardness & chemical resistance
- Pairs with the EXO topper system
- The pro brand you can apply at home
Why buy it: Gtechniq's consumer flagship — the strongest bottle you can buy yourself, rewarding a disciplined wipe-off.
Best for a fast, cheap, all-surface ceramic layer for first-timers
- One-step SiO2 spray coating
- Paint, trim, wheels, glass
- Very easy spray-on, wipe-off
- Months of protection for the price
Why buy it: Gyeon's entry spray coating — real ceramic protection with almost none of the application risk.
Prices are pulled from Amazon and were accurate as of Aug 22, 2026, 6:54 PM EDT. Product prices and availability are subject to change — the live price is shown on Amazon.
What actually separates Gyeon from Gtechniq
Both Gyeon and Gtechniq sell genuine SiO2 (silica) ceramic coatings, which is why the two names come up together constantly in detailing forums. Neither is a snake-oil "spray ceramic" — both cure into a hard, semi-permanent glass-like layer that bonds to the clear coat and has to be polished off, not washed off. So the honest starting point is that you are choosing between two respected professional-grade brands, not a good one and a bad one.
The real separation is philosophy. Gyeon, a Korean brand, built its following on high-solids coatings that lay down a strikingly wet, deep gloss and behave beautifully with water, while keeping a relatively forgiving application window. That combination made it a darling of the enthusiast DIY crowd, because a first-timer is less likely to leave permanent high spots.
Gtechniq, a British brand with a chemistry-lab reputation, leans the other way: it prioritizes measured, warranty-backed durability and hardness, headlined by its pro-only Crystal Serum Ultra and the certified-installer program behind it. The consensus among detailers is that Gtechniq's strongest layers are as durable as anything on the market — but you pay for that with a tighter application window and, for the very best tier, the requirement to have it professionally installed.
Put simply: Gyeon optimizes for the best-looking result you can achieve yourself, and Gtechniq optimizes for the longest-lasting result a professional can certify. Everything else in this comparison flows from that difference.
Durability: the 9-year claim and what it really means
Durability is where Gtechniq's marketing has planted a flag, and it deserves a careful, honest read. Its flagship Crystal Serum Ultra carries a widely cited durability claim of up to nine years — but that figure comes with two important asterisks that owners often miss.
- It is installer-only. Crystal Serum Ultra is not sold to the public. You cannot buy a bottle and apply it in your garage; the nine-year claim is tied to application by a Gtechniq-accredited detailer, which is also what activates the warranty.
- The consumer version is different. The bottle you can buy yourself is Crystal Serum Light, rated around five years, not nine. That is still excellent, but it is not the headline number.
Gyeon's consumer ladder is generally rated lower on paper — the popular Mohs and Quartz layers sit in the roughly two-year class, with the pro tiers reaching toward five years. In practice, aggregated owner reviews suggest both brands' real-world life depends far more on prep, climate, and wash habits than on the label. A coating on a garage-kept car that gets pH-neutral hand washes will outlast the same product on a daily driver left in the sun and run through automatic brushes, regardless of brand.
The honest takeaway: if a verified, warranty-backed, multi-year lifespan is the priority and you are willing to pay a pro, Gtechniq's Crystal Serum Ultra is the strongest documented option. If you are applying it yourself, the durability gap between consumer Gyeon and consumer Gtechniq narrows considerably, and prep quality matters more than the brand on the bottle.
Application: which is more forgiving in a driveway
For anyone coating their own car, this is often the deciding factor, and it is where the two brands diverge most clearly. A ceramic coating is applied as a thin wet film that "flashes" (starts to cure) after a short window, and you must wipe off the excess before it hardens. Wipe too late and you get permanent high spots and streaks that require re-polishing to remove — a genuinely expensive mistake.
The detailer consensus is that Gyeon is the more forgiving of the two to apply. Its high-solids coatings tend to give a slightly longer, more visible flash window and level more willingly, which is exactly what a nervous first-timer wants. Owners frequently cite Gyeon as their first successful DIY coating for this reason.
Gtechniq's consumer and pro layers — Crystal Serum Light in particular — are reported to flash faster and punish slow wipe-off, especially in warm or humid conditions. It rewards experience, good lighting, working one small section at a time, and a disciplined two-cloth wipe technique. In skilled hands the result is superb; in a hot driveway with a first-timer, the risk of high spots is higher than with Gyeon.
A few realities apply to both, and skipping them is the most common cause of a disappointing coating regardless of brand:
- Prep is 80% of the job. Both brands only bond correctly to decontaminated, polished paint. A wash, clay, and at least a light polish (or full correction) is not optional — a coating locks in whatever swirls are underneath.
- Panel wipe matters. An IPA or dedicated prep wipe to strip polishing oils is essential before either coating, or it will not key to the clear coat.
- Controlled conditions win. Both cure best out of direct sun, in moderate temperature and humidity, in a dust-free space. A garage beats a driveway for either brand.
Gloss, hydrophobics and the daily-driver difference
On looks, owner reviews give Gyeon a slight edge for pure wet gloss, particularly on dark colors where its coatings are described as adding a deep, candy-like reflection. Gtechniq is also glossy, but the consensus describes its finish as a touch sharper or "harder" looking rather than as liquid — a difference most people only notice on black or deep metallic paint parked side by side.
On water behavior, the two are closely matched. Both produce strong hydrophobic sheeting and self-cleaning, where rain and rinse water carries dirt off the panel instead of sitting on it. Gtechniq owners frequently add the EXO topper over their base coat to push water-repellency and chemical resistance even further; Gyeon owners use products like Cure or Can Coat in the same maintenance-topper role. Layering a topper every 6–12 months is the single most effective way to keep either coating beading strongly, and it is cheaper than re-coating.
For a daily driver, the practical difference is smaller than the marketing suggests. Both make washing dramatically easier, both resist bird-dropping etching and light chemical staining far better than bare clear coat, and both need the same care: pH-neutral shampoo, no automatic brush washes, and an occasional topper. The gloss gap and the durability gap both shrink once a car is actually living outside and being washed on a real schedule.
Real cost, DIY versus professional, over time
On the shelf the two brands are priced similarly — consumer bottles for both land in roughly the $50–$150 range depending on the tier and kit contents. The bigger cost decision is not Gyeon versus Gtechniq; it is DIY versus professional installation, and that is where the brands' strategies pull apart.
Going the DIY route, a realistic budget for either brand is the coating itself plus the prep supplies that actually determine the result: clay, a polish or a machine polisher, panel wipe, applicators, and quality microfiber cloths. That support kit often costs as much as the coating and is non-negotiable. Done at home, a consumer Gyeon or Gtechniq coating typically runs a few hundred dollars all in — and the labor is a full day.
Going professional tilts toward Gtechniq's model. A certified installer applying Crystal Serum Ultra bundles multi-stage paint correction, controlled-environment application, and a transferable multi-year warranty — a package that commonly runs several hundred to well over a thousand dollars depending on vehicle size and correction level. That price buys the nine-year claim and the warranty that Gyeon's smaller US installer network makes harder to match. If you want a coating you never think about again and are happy to pay for it, that is the value proposition.
Over the life of the car, both approaches can be sound. A well-applied consumer coating topped up annually keeps a car protected for years at modest cost; a professional Ultra job front-loads the spend for the longest hands-off lifespan. Neither is "cheaper" in the abstract — it depends on whether you value your Saturday or your wallet.
Common myths and mistakes
"Gtechniq lasts 9 years, so it beats Gyeon." Only the pro-installed Crystal Serum Ultra carries that claim. The Gtechniq bottle you can buy yourself is Crystal Serum Light, rated around five years — a fairer comparison to Gyeon's pro tiers, and much closer than the headline suggests.
"A ceramic coating means I never have to wash the car." No coating is self-cleaning to that degree. Both brands make washing easier and reduce how much dirt sticks, but a coated car still needs regular pH-neutral hand washes. Skipping washes lets contaminants bond on top of the coating and dull it.
"The coating will protect against scratches and rock chips." A ceramic coating adds chemical resistance and gloss, and resists fine wash marring better than bare clear — but it is only microns thick. It is not paint protection film and will not stop stone chips or key scratches. Owners who expect PPF-level protection are consistently disappointed with both brands.
"I can skip the polishing step and just wipe it on." This is the most expensive mistake with either brand. A coating is optically clear and locks in whatever is underneath, so swirls and etching become permanent for the life of the coating. Prep — wash, decontaminate, polish, panel wipe — is where the result is actually won.
"Layering brands makes it better." Mixing a Gyeon base with a Gtechniq topper (or vice versa) is not guaranteed to bond well; the very slick surface a coating creates can reject a foreign topper. Stay within one brand's documented layering system unless you have tested the combination on a spare panel.
Which should you buy — and how to decide
There is no universal winner, because the two brands optimize for different things. The right choice comes down to who is applying it and what you want out of the finish.
Choose Gyeon if you are applying it yourself, this is one of your first coatings, and you want the wettest gloss with the lowest risk of ruining a panel. Its more forgiving flash window and deep, candy-like finish make it the safer, better-looking DIY bet for most enthusiasts, especially on dark paint.
Choose Gtechniq if you want the longest verified, warranty-backed durability and you are willing to pay a certified installer to apply Crystal Serum Ultra — or if you are an experienced DIYer comfortable with a faster-flashing coating and want the EXO topper system. Its documented long-life tiers and large installer network are the strongest reason to pick it.
Whichever way you go, the decision that matters most sits underneath the brand: prep the paint properly, work in controlled conditions, apply in small sections with disciplined wipe-off, and top the coating up every 6–12 months. Get that right and either brand will give you a slick, glossy, easy-to-wash finish that outperforms bare clear coat by a wide margin. Get it wrong and the most expensive coating on the market will still disappoint.
Recommended Products
Our top picks in this category, ranked on aggregated owner reviews.
Best for DIYers who want the wettest gloss with a forgiving application window
- High-solids 9H SiO2 ceramic
- Deep, candy-like wet gloss
- More forgiving flash & wipe-off
- ~18 months+ of protection
Why buy it: Gyeon's flagship consumer coating — the best-looking, lowest-risk DIY ceramic for most enthusiasts.
Best for owners chasing the longest verified consumer durability and hardness
- Up to ~5 years of protection
- Top-tier hardness & chemical resistance
- Pairs with the EXO topper system
- The pro brand you can apply at home
Why buy it: Gtechniq's consumer flagship — the strongest bottle you can buy yourself, rewarding a disciplined wipe-off.
Best for a fast, cheap, all-surface ceramic layer for first-timers
- One-step SiO2 spray coating
- Paint, trim, wheels, glass
- Very easy spray-on, wipe-off
- Months of protection for the price
Why buy it: Gyeon's entry spray coating — real ceramic protection with almost none of the application risk.
Best for boosting water-repellency and chemical resistance over a base coat
- Extreme hydrophobic sheeting
- Layers over Crystal Serum
- Extra chemical & stain resistance
- Gtechniq's documented topper
Why buy it: The EXO half of Gtechniq's Serum + EXO system — the classic way to push beading further.
Best for quick gloss and beading top-ups between full coatings
- SiO2 spray sealant
- Wet or dry application
- Restores slickness & beading
- Cheap, fast maintenance
Why buy it: Gyeon's maintenance topper — a two-minute way to keep a coated car beading strongly.
Best for an easy spray-on ceramic sealant for owners who want no fuss
- Spray-on liquid crystal sealant
- UV & dirt repellency
- Up to ~6 months per application
- Beginner-friendly to apply
Why buy it: Gtechniq's grab-and-go sealant — the low-commitment way into the brand's chemistry.
Prices are pulled from Amazon and were accurate as of Aug 22, 2026, 6:54 PM EDT. Product prices and availability are subject to change — the live price is shown on Amazon.