Ceramic Coatings and Protection
Adam's Graphene Ceramic Coating vs Gyeon Mohs EVO
Adam's claim more than twice the durability. Gyeon tell you how much coating a car needs and what a second layer buys. Those are not the same kind of information.
By Sawyer V. · Last verified 2026-09-10
We have not tested any of this. Everything below is compiled from published manufacturer specifications, and the arithmetic is printed so you can check it. This page carries affiliate links: if you buy through one we earn a commission at no extra cost to you, and it does not change the order of the picks. Full disclosure.
| # | Pick | Best for | Score | Price |
|---|---|---|---|---|
| 1 | Gyeon Q² Mohs EVO Gyeon | The longest durability claim anyone here puts in writing | 6.1/10 | Check price on Amazon |
| 2 | Adam's Graphene Ceramic Coating Adam's Polishes | The biggest claim on the page, and the fullest kit | 6.0/10 | Check price on Amazon |
No live price is currently verified, so every button here reads Check price rather than a number we cannot stand behind. Why we do it that way.
Side by side, on published figures only
| Gyeon Mohs EVO | Adam's Graphene Ceramic Coating | |
|---|---|---|
| Claimed durability | Up to 36 months (1 layer), 48 months (2 layers) | 7+ years |
| Published consumption | 15-25ml per car | Not published |
| Water-free / cure | 12 hours, out of direct sun | 24 hours free from water and weather |
| Claimed hardness | Not published | Greater than 10H |
| Sizes | 30 / 50 / 100ml | 60ml |
| List price | Not published by Gyeon | $119.99 |
| In the box | Coating, applicator, Q²M Cure 100ml, manual | Coating, Graphene Boost, Surface Prep, towels, applicators, gloves |
A claim twice the size is not twice the coating
Adam’s claim is more than twice Gyeon’s single-layer figure. That is a claims gap, not a demonstrated performance gap, and the larger claim is also the one nobody can test inside a timeframe that helps you. Gyeon’s figures are smaller and more specific: a number per layer, and a consumption range that tells you how much you are buying.
The cure window is the practical difference
Gyeon publish 12 hours water-free, out of direct sun. Adam’s publish 24 hours free from water and weather. On a car that lives in a garage the difference is nothing. On a car that lives on the street, a 12-hour window is a single evening and a 24-hour window is a weather forecast you have to trust.
Consumption is the figure Adam’s leave out
Gyeon’s 15 to 25ml per car means a 30ml bottle is one layer on most cars and a 50ml bottle is two on a small one. Adam’s publish no coverage figure for a 60ml bottle, so whether it is one car or three is something you find out after opening it.
Who should buy which
- Your car lives outside: Mohs EVO, for the 12-hour water-free window.
- You want to know how much coating to buy: Mohs EVO, for the published consumption.
- You want prep, topper and applicators in one purchase: Adam's.
- You are choosing on the biggest durability claim: read how long coatings last first.
Every pick, with the working
Each entry lists the specifications the maker publishes, the axis scores those specifications produce, and what you give up. Rows that read “Not published” are not omissions on our side: they are figures the maker will not commit to in writing, and they cost the product points on the transparency axis.
Our pickThe longest durability claim anyone here puts in writing
Gyeon Q² Mohs EVO
Gyeon
Gyeon claims 36 months for one layer and 48 for two, which is the longest published figure in this ledger, and the page states a consumption rate of 15 to 25ml per car so you can work out how many cars a bottle covers before you buy it. What Gyeon does not publish is a solids or SiO2 percentage, so the number that would let you compare its chemistry to CarPro's is missing.
- Sizes
- 30ml / 50ml / 100ml
- Claimed durability
- Up to 36 months (1 layer), 48 months (2 layers)
- Published consumption
- 15-25ml per car
- Water-free period
- 12 hours, out of direct sun
- In the box
- Coating, applicator, Q²M Cure 100ml, manual
- SiO2 content
- Not published
- Application temperature range
- Not published
- List price
- Not published
What it does well
- 36 months claimed for a single layer, 48 for two, published on Gyeon's own product page
- Consumption published as 15-25ml per car, which is the figure that tells you what a 50ml bottle actually covers
- Ships with Q²M Cure, an applicator and a maintenance booklet rather than a bare bottle
- Three sizes, so a single-car job does not require the professional bottle
Who it is not for
- No SiO2 or solids percentage published anywhere on the product page
- No application temperature range published, which matters for a garage job in winter
- Gyeon does not publish a US list price, so the cost per car cannot be calculated from their own figures
How this score was calculated
- Protection claim6.0/10, weight 20%
- Gyeon claims 36 months, scored against the 60-month ceiling this category tops out at. That is the manufacturer's claim reported here, not a durability figure anyone measured for us.
- Capabilitydropped
- Gyeon does not publish a figure for published sio2 content on this product, so the axis is dropped and the remaining weights are re-normalized.
- Cost per ouncedropped
- Either the list price or the container size is unpublished, so the division cannot be done and the axis is dropped.
- Price against the ceilingdropped
- The maker publishes no list price, so there is nothing to score here and the axis is dropped.
- Written commitmentdropped
- Gyeon publishes no warranty term on this product's own page, so the axis is dropped. On a tool that is worth noticing, and it costs the product points on transparency instead.
- Spec transparency6.3/10, weight 18%
- 5 of the 8 specifications we went looking for are published by Gyeon. Every blank row below is something the maker will not put in writing, and it costs the product points here.
Specifications from Gyeon's Q² Mohs EVO product page, compiled September 8, 2026.
2The biggest claim on the page, and the fullest kit
Adam's Graphene Ceramic Coating
Adam's Polishes
Skip this one. A 7+ year claim on a DIY coating is the kind of number that is impossible to falsify inside the warranty period and impossible to verify outside it. If the claim is what is selling you, buy the coating that publishes a coverage figure instead.
Adam's publishes 7+ years of protection and >10H hardness on a 60ml bottle at $119.99, in a kit that includes surface prep, a booster, applicators, towels and gloves. The claim is the largest in this ledger by a factor of two, and Adam's publishes no coverage figure to go with it, so you cannot work out how many cars the bottle does.
- Size
- 60ml
- Claimed durability
- 7+ years
- Claimed hardness
- Greater than 10H
- Cure time
- 24 hours free from water and weather
- In the box
- 60ml coating, 4oz Graphene Boost, 4oz Surface Prep, 4 towels, 2 applicators, gloves
- Published coverage
- Not published
- SiO2 content
- Not published
- Warranty
- Not published
What it does well
- 7+ years claimed, the longest figure any maker in this ledger publishes
- Kit is genuinely complete: 4oz Surface Prep, 4oz Graphene Boost, applicators, suede and soft towels, gloves
- 24-hour cure window published plainly on the page
- A UV tracing feature is offered so you can see where you have already coated
Who it is not for
- No coverage or consumption figure published, so cost per car is not calculable from Adam's own numbers
- No SiO2 or graphene percentage published; >10H hardness is a claim, not a number you can check
- $119.99 is the highest list price here and the bottle is 60ml
How this score was calculated
- Protection claim10.0/10, weight 20%
- Adam's Polishes claims 84 months, scored against the 60-month ceiling this category tops out at. That is the manufacturer's claim reported here, not a durability figure anyone measured for us.
- Capabilitydropped
- Adam's Polishes does not publish a figure for published sio2 content on this product, so the axis is dropped and the remaining weights are re-normalized.
- Cost per ounce4.4/10, weight 16%
- $119.99 for 2.03 oz works out at $59.11 an ounce, scored against a band of $20.00 (good) to $90.00 (expensive) for a ceramic coating.
- Price against the ceiling2.0/10, weight 14%
- A listed $119.99 against the $150 one upgrade in this category realistically tops out at. A list price captured on the compile date, not a live price and not what you will pay.
- Written commitmentdropped
- Adam's Polishes publishes no warranty term on this product's own page, so the axis is dropped. On a tool that is worth noticing, and it costs the product points on transparency instead.
- Spec transparency6.3/10, weight 18%
- 5 of the 8 specifications we went looking for are published by Adam's Polishes. Every blank row below is something the maker will not put in writing, and it costs the product points here.
List price $119.99 per Adam's Polishes' own store, captured on the compile date below. Not a live price and not what you will pay — the button is where the real number is.
Specifications from Adam's Graphene Ceramic Coating product page, compiled September 8, 2026.
No live price is currently verified, so every button here reads Check price rather than a number we cannot stand behind. Why we do it that way.
Questions people actually ask
+Which lasts longer, Adam's Graphene or Gyeon Mohs EVO?
+Should I do two layers of Mohs EVO?
+How long before I can drive in the rain?
+Which kit comes with more?
Where these figures came from
- Gyeon Q² Mohs EVO product page — retrieved 2026-09-08
- Adam's Graphene Ceramic Coating product page — retrieved 2026-09-08
Every figure on this page is a published manufacturer or authorized-retailer claim, not a measurement we made. How we research explains exactly what we did and did not do.