--- title: "CQuartz UK 3.0 vs Gyeon Mohs EVO: Which DIY Coating Wins" description: "CQuartz UK 3.0 and Gyeon Mohs EVO are the two most popular DIY-friendly ceramic coatings in 2026. Here is how their chemistry, durability and price compare." type: compare service: ceramic-coating publishAt: "2026-10-12T18:30:00Z" canonical: "https://coateau.com/compare/cquartz-uk-3-vs-gyeon-mohs-evo" sources: - label: "CarPro CQuartz UK 3.0 official product page" url: "https://carpro.global/product/cq_uk/" - label: "CarPro CQuartz UK 3.0 review: SiO2 content, durability and DIY positioning" url: "https://www.autocaregenius.com/blogs/education/cquartz-uk-3-0-review-the-self-cleaning-ceramic-coating-explained" - label: "Gyeon Q2 Mohs EVO product specifications and durability ratings" url: "https://www.carsupplieswarehouse.com/products/gyeon-q2-mohs-evo-ceramic-coating" - label: "Gyeon 10 year warranty program terms (Flash / Flash EVO, Mobile Certified Detailers)" url: "https://gyeon360.co/upload/files/10_years_warranty_terms_and_condition.pdf" --- # CQuartz UK 3.0 vs Gyeon Mohs EVO: Which DIY Coating Wins CQuartz UK 3.0 and Gyeon Mohs EVO are close enough in price and durability that the choice usually comes down to application feel rather than chemistry on a spec sheet: CQuartz UK 3.0 levels more like a classic wipe-on SiO2 coating with a slightly tighter working window, while Mohs EVO's polysilazane formula gives a wider margin for error and is the easier first ceramic coating for most DIYers. Both are sold direct to consumers with no manufacturer warranty attached, both land in roughly the same price band, and both are the product most enthusiasts reach for before stepping up to an installer-only coating like Gtechniq Crystal Serum Ultra or Ceramic Pro Gold. This guide compares what CarPro and Gyeon actually publish about each coating, not just the marketing copy. ## Key facts - **CQuartz UK 3.0** is 70 percent SiO2 at 99.9 percent purity, rated for 18 to 24 months of real-world durability, no manufacturer warranty. - **Gyeon Mohs EVO** uses a fluoro-modified polysilazane base, rated up to 36 months (40,000 km) at one layer and up to 48 months (50,000 km) at two layers. - Both coatings are sold DIY: CQuartz UK 3.0's 30ml kit runs about $70, Gyeon Mohs EVO's 50ml bottle runs about $90. - Neither carries a brand-backed installer warranty; Gyeon's advertised 10 year warranty program covers Flash EVO through Mobile Certified Detailers, not Mohs EVO. - Professionally installed, both price close to the Coateau Silver to Gold boundary on a sedan, roughly $500 to $1,000. - CQuartz UK 3.0 needs Reload 2.0 topper every 2 to 3 months to hit its full durability window; Mohs EVO's spec does not require a topper to hit its rated months. ## Verdict CQuartz UK 3.0 and Gyeon Mohs EVO are the two best DIY ceramic coatings on the market in 2026, and neither one is a wrong choice. Pick Mohs EVO at two layers for the longer rated window and easier application, or CQuartz UK 3.0 for the higher published SiO2 purity and longer track record if you are willing to keep up with a topper. Skip paying installer-only pricing for a warranty, since neither of these products carries one anyway. (Rating: 4.3/5) ## Chemistry: SiO2 Versus Polysilazane CQuartz UK 3.0 is built on classic silicon dioxide chemistry at a published 70 percent SiO2 content and 99.9 percent purity, among the highest SiO2 figures any brand states publicly for a consumer-tier coating. That high purity is what CarPro credits for the coating's gloss and chemical resistance, and it is backed by one of the longest public track records in the category since the original CQuartz line predates most current competitors. Gyeon Mohs EVO skips the SiO2-versus-SiC debate entirely with a fluoro-modified polysilazane formula. It cures into a similarly hard, glass-like network but behaves differently during application: Gyeon rates it for up to five minutes of working time before wiping off, versus the narrower window typical of straight SiO2 coatings, and the fluorine modification cuts down on the smearing and high-effort buffing that trips up first-time installers. ## Durability and Maintenance Side by Side On paper, Mohs EVO's two-layer rating of 48 months edges out CQuartz UK 3.0's 18 to 24 month claim by a wide margin. The comparison is not quite even, though, since CarPro's number assumes a single layer and regular reapplication of Reload 2.0, its spray topper, every two to three months, while Gyeon's longer figure is the two-layer install number, not the single-layer one. _CQuartz UK 3.0 vs Gyeon Mohs EVO, published specs_ | | CQuartz UK 3.0 | Gyeon Mohs EVO | | --- | --- | --- | | Chemistry | SiO2, 70% content, 99.9% purity | Fluoro-modified polysilazane | | Layers | 1 (topper maintained) | 1 or 2 | | Rated durability | 18 to 24 months | 36 months (1 layer) / 48 months (2 layers) | | Mileage cap published | No | 40,000 km / 50,000 km | | Manufacturer warranty | None | None (10-year program applies to Flash EVO only) | | DIY kit price | ~$70 for 30ml | ~$90 for 50ml | > Mohs EVO's longer rating is a two-layer number. A fair single-layer comparison narrows the durability gap considerably. ## Which One Is Easier for a First-Time DIYer Mohs EVO is the more forgiving product to learn on. Its five-minute working window and tolerance for stable outdoor application give a nervous first-timer more room to fix a missed spot before the coating flashes, and Gyeon's own simpler Can Coat EVO exists specifically for buyers who want even less risk. CQuartz UK 3.0 rewards a careful, methodical panel-by-panel technique and a controlled indoor space more than it forgives rushing. Neither is a true one-step: both expect full paint decontamination, claying and ideally a light polish first, since any coating locks in whatever swirl marks or residue are already on the paint. - CQuartz UK 3.0: tighter working window, rewards indoor application and methodical technique - Gyeon Mohs EVO: wider working window, tolerant of stable outdoor conditions, easier to level ## Price for a Full Install Buying direct, a single CQuartz UK 3.0 30ml kit at roughly $70 covers a sedan with one layer and comes bundled with Reload 2.0 for ongoing maintenance. A 50ml bottle of Mohs EVO at roughly $90 also covers a sedan, with enough left over for a second layer on some panels if you are chasing the 48-month rating, though a full two-layer job on a sedan more realistically needs a second bottle. Professionally installed, both land close together: expect roughly $500 to $900 for a CQuartz UK 3.0 install and $600 to $1,000 for a single-layer Mohs EVO install on a standard sedan, pushing toward the top of that range for two layers. SUVs run about 20 percent higher and large SUVs or trucks about 40 percent higher for either product because of the added surface area. ## The Honest Verdict Between the Two Buyers chasing the longest rated protection window and comfortable with outdoor or lower-light application should lean toward Mohs EVO at two layers. Buyers who want the single highest published SiO2 content and a longer public enthusiast track record, and who are willing to keep up with a topper every few months, should lean toward CQuartz UK 3.0. Either choice beats stepping up to an installer-only coating just for the warranty paperwork, since neither CQuartz UK 3.0 nor Mohs EVO actually carries one, so you are not giving anything up by staying in the DIY tier. If the budget allows a professional install of either product, the instant quote on Coateau shows which local studios carry each brand and at what price, which is often the deciding factor over the chemistry itself. ## Frequently asked questions **Q: Is CQuartz UK 3.0 or Gyeon Mohs EVO more durable?** A: Mohs EVO's two-layer rating of 48 months is longer than CQuartz UK 3.0's 18 to 24 month claim, but CQuartz UK 3.0's number assumes one layer with a topper reapplied every 2 to 3 months, so the single-layer comparison is closer than it looks. **Q: Can a beginner install either coating?** A: Yes, but Mohs EVO is generally easier for a first attempt because of its longer working time and tolerance for stable outdoor application. CQuartz UK 3.0 rewards a more controlled indoor environment and careful technique. **Q: Does either coating come with a manufacturer warranty?** A: No. Neither CQuartz UK 3.0 nor Gyeon Mohs EVO carries a brand-backed warranty. Gyeon's advertised 10 year warranty program applies to its Flash EVO line through Mobile Certified Detailers, not to Mohs EVO. **Q: Which coating is cheaper?** A: CQuartz UK 3.0's 30ml DIY kit costs about $70 and Gyeon Mohs EVO's 50ml bottle costs about $90, both enough for one layer on a sedan. Professionally installed, the two price within about $100 to $200 of each other. **Q: Do I need two layers of Mohs EVO to see a benefit?** A: A single layer still rates up to 36 months, which beats CQuartz UK 3.0's claim without a topper. A second layer pushes the rating to 48 months and is worth it mainly for owners who do not want to reapply a topper on any schedule. ## Sources - [CarPro CQuartz UK 3.0 official product page](https://carpro.global/product/cq_uk/) - [CarPro CQuartz UK 3.0 review: SiO2 content, durability and DIY positioning](https://www.autocaregenius.com/blogs/education/cquartz-uk-3-0-review-the-self-cleaning-ceramic-coating-explained) - [Gyeon Q2 Mohs EVO product specifications and durability ratings](https://www.carsupplieswarehouse.com/products/gyeon-q2-mohs-evo-ceramic-coating) - [Gyeon 10 year warranty program terms (Flash / Flash EVO, Mobile Certified Detailers)](https://gyeon360.co/upload/files/10_years_warranty_terms_and_condition.pdf)