What does H mean in ceramic coating?

In ceramic coating, H stands for Hardness, measured using the Pencil Hardness Scale (Wolff-Wilborn test), indicating the coating's resistance to scratching, with higher numbers (like 9H or 10H) signifying greater scratch resistance, essentially how hard a pencil it can withstand without damaging the coating. A 9H coating resists a 9H pencil, while 10H is even harder, though 10H often refers to a dual-layer, premium system, not just a single pencil hardness.

Is 9H ceramic better than 10H?

10H is definitely harder than 9H.

The pencil hardness test is just one of the many different tests that evaluate the ceramic coating's performance. Most ceramic coatings test abrasion, impact resistance, adhesion, oxidation, gloss, UV resistance, yellowing, drying times, chemical resistance and more.

What is H in ceramic coating?

Firstly, it is important to understand that the H in 9H and 10H refers to hardness. It is not measured by the MOHS scale, which measures the hardness of other minerals, with diamond being the hardest. In contrast, pencil hardness scale measures the hardness of automotive ceramic coatings.

What does 9H mean in ceramic coating?

A 9H ceramic coating is a liquid polymer (mostly Silicon Dioxide, SiO2) that chemically bonds to a vehicle's paint, forming a hard, clear, glass-like shield that protects against contaminants, UV rays, and minor scratches, while providing a deep gloss and hydrophobic (water-repelling) finish; the "9H" refers to its hardness on the pencil hardness scale, indicating strong resistance to scratching. It's essentially an extra, durable clear coat that makes cleaning easier and keeps the vehicle looking new longer. 

What does 20H mean in ceramic coating?

In ceramic coatings, "20H" is a marketing term, not a real standard; it's meant to convey extreme scratch resistance beyond typical 9H or 10H ratings by using the pencil hardness scale, but it's exaggerated hype, as a true 20H would be harder than diamond, making application impossible. The "H" comes from the pencil hardness test, where harder pencils (like 9H, 10H) resist scratching the surface more than softer ones (like 2B). While it indicates superior protection against swirls and contaminants, actual performance depends on the coating's overall formula (like graphene additions) and proper application, not just the inflated number.
 

Ceramic Coating Myths, Lies, and Misconceptions

What is the highest quality ceramic coating?

The "best" ceramic coating depends on your needs (durability vs. ease of use), but top-rated options for durability include Gtechniq Crystal Serum Light & Exo V5, while CarPro Cquartz UK is also highly praised; for ease of application, Turtle Wax Hybrid Solutions Ceramic Spray or Chemical Guys HydroSlick are excellent DIY choices, with Clean by Pan Ceramic Spray noted for great gloss and user experience. For ultimate enthusiasts, high-end options like KamiKazi Coatings offer premium results but at a higher cost.
 

What destroys ceramic coating?

What Threatens Your Ceramic Coating?

• Harsh Washing Techniques. One of the most significant contributors to ceramic coating degradation is improper washing. ...
• Road Grime and Salt. ...
• Acid Rain and Bird Droppings. ...
• UV Radiation. ...
• Harsh Chemicals. ...
• Mechanical Abrasion.

Which is harder, 7H or 9H?

The 'H' stands for hardness, the 'B' stands for blackness, and HB is for hard and black pencils. The hardest is a 10H, followed by 9H, 8H, 7H, 6H, 5H, 4H, 3H, 2H, and H. F is the middle of the hardness scale; then comes HB, B, 2B, 3B, 4B, 5B, 6B, 7B, 8B, and 9B, which is the softest.

Can you go to a regular car wash with ceramic coating?

Automatic car washes may seem convenient, but they can degrade your ceramic coating over time, especially if they use brushes. While touchless options are less damaging, hand washing remains the safest method to maintain the integrity and performance of your ceramic coating.

Is 9H or 9D better?

9H: Focuses on scratch resistance. 9D: Refers to the dimensional design and edge coverage of the protector. A 9D protector might offer better edge-to-edge protection, but not necessarily better scratch resistance.

Can I wax over ceramic coating?

Yes, you can wax over a ceramic coating to add extra gloss and protection, but it's often unnecessary as the coating already provides strong defense, and the wax won't bond as well or last as long as it would on bare paint, requiring frequent reapplication. Choose a compatible, non-abrasive wax or ceramic spray, avoid combining with polishes, and ensure the coating is fully cured (wait 72 hours to 7 days) before applying.
 

What is the 80 20 rule for coating?

Individual dry-film thicknesses between 80% of the NDFT and the actual NDFT are acceptable provided that the number of these measurements is less than 20% of the total number individual measurements taken. Additionally, individual readings shall be less than or equal to the specified Maximum Dry Film Thickness.

How much does a 7 year ceramic coating cost?

A professional 7-year ceramic coating typically costs between $1,000 and $3,500+, varying significantly with vehicle size, paint condition (requiring more correction for older cars), brand, and location, with mid-range coatings often falling in the $1,000-$2,000 range and high-end coatings exceeding $2,000-$3,000, often including extensive paint prep. 

Why do car manufacturers not do ceramic coating?

Complexity of application: Applying ceramic coating requires a high level of skill and expertise, and is a time-consuming process. Car manufacturers typically focus on mass-producing vehicles efficiently and may not have the resources or facilities to apply ceramic coating on a large scale.

What are the disadvantages of 9H coating?

Doesn't stop rock chips:

It just acts as a sacrificial layer to protect your paint and since it's just bonded to your car paint, it won't necessarily prevent abrasions and rock chips from damaging your car.

Can I apply 9H ceramic coating myself?

In short – a professional ceramic coating is far superior to a DIY coating. If you're not 100% confident in the DIY ceramic coating installation or concerned about possible health risks, don't take the chance. Consider a professionally-applied nano coating like Ceramic Pro 9H.

Does Dawn dish soap take off ceramic coating?

Quick answer: No - dish soap won't remove a properly cured ceramic coating, but it's too harsh for routine washing and can dull hydrophobics or strip toppers. Use a pH-neutral, coating-safe shampoo; if you've used dish soap, rinse well and apply a maintenance spray.

What is the downside to ceramic coating?

The main disadvantages of ceramic coating are its high upfront cost, the labor-intensive preparation required (including paint correction), its limited protection against deep scratches/chips, the need for ongoing maintenance, and the potential for misleading marketing claims about durability or invincibility. While beneficial, it's not a permanent fix and still requires proper washing techniques, making it a significant investment that doesn't eliminate all risks or care needs. 

How to tell if a car is ceramic coated?

To tell if a car is ceramic coated, perform a water beading test: spray water on the surface, and if it forms tight, round beads that roll off quickly (hydrophobicity), it likely has a coating; look for a deep shine, smooth feel, and check for paperwork or history, as visual inspection alone isn't foolproof against waxes/sealants. 

How long does 9H ceramic coating last?

On average, a 9H ceramic coating lasts 2–5 years. Some premium applications may even last longer, but their lifespan depends on: Quality of the coating – Higher quality coatings last longer. Maintenance – Regular cleaning with pH-neutral shampoo extends durability.

What is better than 9H?

To answer this generally, yes 10H is better than 9H, but it doesn't mean that 9H is bad at all.

Does rain mess up ceramic coating?

While rainwater on its own won't harm the ceramic coating, leaving water to dry on the surface can result in unsightly water spots that obscure the vehicle's shine. By drying the car after rain showers, you maintain the pristine finish provided by the ceramic coating.

Can you buff out ceramic coating?

Yes, you can polish a ceramic-coated car, but you must use a very fine, non-cutting polish with a soft pad, as abrasive polishing removes or thins the sacrificial ceramic layer, requiring reapplication; the goal is to correct minor haze or light swirls, not deep scratches, which need professional repair or recoating after polishing. Use minimal abrasion to clean the coating and restore gloss, then follow up with a ceramic spray or sealant for protection. 

Can you jet wash a ceramic coated car?

In short, the answer to this question is yes. Ceramic coating can be cleaned using a pressure wash, but you must be careful not to damage it. Although ceramic coating is very strong and can withstand water under high pressure, it is not unbreakable.