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Epoxy break down from UV rays
The clear coat applied on carbon fiber products is not what protects them from UV rays. UV rays penetrate clear coatings and begin to attack the chemical bonds of the applied polymers on the surface. This is a chemical attack known as oxidation. The clear coat does not yellow due to the chemical breakdown of the polymers. The yellowing effect of this breakdown and the formation of a network of microcracks on the surface of the coating occurs within a year or two. The presence of water vapor can accelerate the damage caused by UV rays. Water vapor can decrease the strength of the resin by up to 50% when the relative humidity is above 60% (Polymer Degradation Studies, 2022). The degradation from UV rays occurs in three distinct phases. Each of these three phases has distinct but observable characteristics.
Step 1: Absorption of UV causes the formation of yellow carbonyl groups.
Step 2: Cross-link density decreases due to chain scission which increases brittleness.
Step 3: Environmental erosion exposes the carbon weave due to the development of micro-crack networks.
Comparative Efficacy of UV Sealants, Ceramic Coatings, and PPF for Carbon Fiber Products
Different methods of protection differ in their UV-blocking ability and longevity.
Protection Method UV Rejection Rate Longevity Application Complexity
Spray Sealants 70–80% 3–6 months Low (DIY-friendly)
Ceramic Coatings 98–99% 2–5 years High (professional recommended)
Paint Protection Film (PPF) 99%+ with UV inhibitors 5–10 years Very High (certified installers)
Ceramic coatings, utilizing nanotechnology, create a protective layer made of silica dioxide that is capable of reflecting UV rays that would otherwise cause damage to the resin. Sealants rest on the surfaces while ceramic coatings chemically bond to the clear coat, providing better protection against harsh chemicals and normal wear and tear. Although paint protection film (PPF) provides excellent physical protection against rocks and debris, wrapping on the edges must be done carefully to avoid the film lifting.
Ceramic coated PPF is a good solution to keep the carbon fiber looking good for longer, as it merges both layers into a single solution that also protects against impacts, and shields them from UV light by about 99.9%. Annual tests performed on Surface Engineering Journal showed that these systems maintained over 95% of their original shine even after being exposed for 5 years.
How to Clean to Avoid Micro Scratches or Damage to the Resin and Preserve the Gloss Finish
The Essentials of pH Neutral: Why Cleaning Products That Are Alkaline or Acidic Are Bad for Your Epoxy Resin and Carbon Fibers
Stronger cleaners that are either highly alkaline or highly acidic will deteriorate the epoxy resin used to bond carbon fibers and lead to the dreaded yellowing and clouding of the resin, and eventually, will cause the resin to become brittle and break. It is best to choose a product that is in the neutral pH range of 6 to 8. Neutral pH cleaners will clean the resin without affecting its structure or its ability to protect the resin from UV rays. For tougher stains, the rule of less is more applies, and it is best to use a diluted solution. Most situations are best served with a 5% or lower solution. This will do a nice job keeping the surface shiny and will help retain the protective qualities that are important for carbon fiber.
Microfiber Science: Towels and Other Microfiber Products
Weave Density: 300-500 GSM with split fiber are ideal. The greater the density, the more abrasive particulate matter is kept from contacting the surface.
Washing: Wash separately every 2-3 uses using a fragrance free detergent. Do not use fabric softeners because they coat the fibers and reduce absorbency.
Water Removal: Use the “pat-and-lift” method with towels. Do NOT drag or rub the towels, as this introduces micro-scratching.
To minimize osmosis blistering, air dry the towels flat, as they can retain moisture in the seams. To keep the results consistently free from scratches, replace the towels every three months.
Choosing a Protective Coating and Determining How Long it Will Last on a Carbon Fiber Product
Carnauba Wax vs. Synthetic Spray Wax vs. Ceramic Coating: Their Hardness, Water Repellent Properties, and Longevity When Used on Carbon Fiber
There are three protective options available, along with a few caveats: durability, ease of use, and suitability for carbon fiber's distinct texture.
Carnauba wax provides that shiny look that many people love to see on cars, however, Carnauba wax will not hold up well with consistent UV ray exposure, and won't hold up to scratches as the natural ingredients in Carnauba wax breakdown quickly when in the sunlight. Today's market for synthetic spray waxes contain unique polymers that allow them to last longer, and increase beading of Water to droplets. Finally, when it comes to ceramic coatings, the layer of ceramic coating will bond to the vehicle's surface at a molecular level, and create a glass-like layer that will resist oxidation, scratches from washing, and will resist chemical breakdowns. There are a few tests that have been conducted with these coatings that show that a coating will maintain up to 90% of the original shine that the coating had for a driving time of 1.5 years in real world driving conditions.
This also means they won't get little scratches from normal cleaning, which makes them fantastic for high use applications. While monthly applications of carnauba are fine for people who only want to polish their car for shows, people who drive a lot or store their bikes outside should definitely opt for ceramic coatings.
Maintenance Scheduling and Proactive Restoration for Sustained Gloss Retention
To keep carbon fiber surfaces shiny and new for years, maintenance must be done regularly instead of waiting for problems to arise. Owners of surfaces must create a maintenance schedule for cleanings, surface checks, and coating applications. These small maintenance routines prevent small issues, such as scratches, cloudiness, and oxidation, from deteriorating the surface and becoming larger, more expensive problems. A 2022 study published in the Journal of Composite Materials, stated that routine maintenance reduced repairs up to 20%. This maintenance is essential in retaining surfaces' gloss and surfaces should be coated regularly to keep surfaces from looking dull. To break the cycle of deterioration, maintenance should be done 2-3 months to keep carbon fiber surfaces beautiful, glossed, and functional for as long as possible.
FAQ
Why do carbon fiber products change color?
When carbon fiber products change color, it is likely due to UV exposure. Resin breaks down, leading to oxidation and the formation of carbonyl groups.
What can be done to limit UV degradation of carbon fiber products?
UV degradation can be limited by using protective coatings such as ceramic coatings, spray sealants, and paint protective films, as they significantly limit UV exposure.
What method provides the most UV protection for carbon fiber products?
Most protection is provided with paint protective films and ceramic coatings, which together provide almost complete UV exposure and protective coverage.
What cleaning guidelines help preserve the condition of a carbon fiber surface?
The gloss of a surface can be better preserved and micro-scratches can be avoided by using pH neutral cleaning products and cleaning with microfiber towels.
Why is it beneficial to maintain a carbon fiber product?
When issues are small, they can be dealt with more easily. In this way, the gloss is retained for years and lengthens the life of the carbon fiber surface.