Over time, harsh elements such as wind, rain, and salt can weaken the integrity of buildings and damage their appearance. By selecting the right coating system, developers can protect buildings from environmental stressors, extend their lifespans, and preserve their aesthetic appeal.
FEVE (fluoroethylene vinyl ether) coatings are a leading coating solution that delivers excellent weatherability. These advanced coatings resist corrosion, fading, and chalking, protecting building materials. By using coatings such as LUMIFLON® FEVE-based systems, developers can shield critical structures from harsh environments, reducing lifecycle costs and improving durability.
The Importance of Coating Systems in Harsh Conditions
Exterior coatings act as the first line of defense against:
- Moisture intrusion
- UV degradation
- Chemical exposure
- Thermal cycling
Without a high-performance coating, substrates can experience corrosion, chalking, fading, and structural degradation over time.
Fluoropolymer coatings like FEVE and other commercial fluoropolymers are widely specified because of their strong carbon-fluorine bonds, which resist environmental breakdown better than traditional coatings.
What Are FEVE Coatings?
FEVE resins have a unique molecular structure that enhances durability. Their strong carbon-fluorine bonds resist degradation from harsh chemicals, sunlight, and moisture. According to accelerated weathering tests, FEVE coatings last five times longer than acrylic urethanes. In addition, they offer a broader range of colors, gloss levels, and finishes than standard fluoropolymer coatings.
What Are LUMIFLON® FEVE-Based Coatings?
AGC offers LUMIFLON® FEVE resins, which are often used as ingredients in coatings to improve their performance. LUMIFLON-based coatings are weather-resistant and maintain their color and gloss for years in tough environments. They are ideal coating systems for bridges, buildings, water towers, and other critical structures that must maintain their integrity and aesthetic appeal.
How LUMIFLON Coatings Excel in Harsh Environments
Salt air, intense sunlight, freeze-thaw cycles, and industrial pollution are among the harshest conditions coatings must withstand. LUMIFLON FEVE coatings outperform many conventional technologies in these demanding environments.
Resists Corrosion in Coastal Environments
Coastal regions expose buildings to salt spray, humidity, and constant moisture, accelerating corrosion.
- Both FEVE and other commercial fluoropolymer coatings, meet stringent performance standards (such as AAMA 2605) and demonstrate strong resistance to salt spray and humidity.
- FEVE coatings form dense, protective films that resist corrosion and moisture penetration, helping preserve substrate integrity.
- FEVE and other commercial fluoropolymer coatings have a long track record in coastal environments due to their exceptional resistance to salt and chemical attack.
- FEVE matches other fluoropolymer coatings in corrosion resistance but offers additional advantages in application efficiency and film thickness, which can enhance long-term protection. Standard polyester coatings degrade faster in salt-rich environments, often requiring recoating within 5–8 years.
LUMIFLON FEVE coatings provide outstanding protection in salt-air environments by forming a strong barrier against the penetration of oxygen, water, and chloride ions — key drivers of corrosion. This makes them especially well-suited for use on bridges, water towers, and other structures exposed to marine conditions. By comparison, other coating types degrade more quickly over time.
In contrast, epoxy coatings tend to chalk and break down with prolonged salt exposure, while acrylics can fade and lose their color over time.
Salt spray testing demonstrates the durability of FEVE-based coatings. In tests using LUMIFLON FD-1000, a water-based dispersion crosslinked with water-dispersible isocyanates, the coatings maintained high gloss and strong corrosion resistance even after extended exposure. At both 1000 and 15,000 hours, LUMIFLON systems continued to perform well, while other coatings began to blister and show visible defects.
Retains Color During Ultraviolet Exposure
Ultraviolet (UV) radiation is one of the most destructive environmental forces for coatings.
- FEVE coatings are known for exceptional UV resistance and superior color retention, maintaining brightness and gloss over time.
- They also exhibit strong resistance to chalking, fading, and surface degradation under prolonged exposure.
FEVE is often selected for projects where aesthetic longevity is critical, such as landmark buildings or color-intensive facades. Compared to other technologies, it:
- Exhibits significantly less fading and chalking than polyester coatings
- Provides improved UV resistance compared to SMP coatings.
Pollution and Chemical Exposure in Industrial and Urban Environments
Urban and industrial settings introduce acid rain, airborne chemicals, and pollutants that can degrade coatings. Pollutants such as sulfur dioxide, nitrogen oxides, ozone, and airborne particulates can mix with moisture to form acids that corrode metal and erode concrete.
- FEVE coatings provide enhanced resistance to environmental pollutants and chemical exposure, maintaining surface integrity over time.
- Acrylics or alkyds often struggle under these conditions and can degrade, discolor, or lose protective properties.
- Both outperform conventional coatings in resisting staining, erosion, and chemical attack.
While other fluoropolymer coatings may still lead in heavy chemical resistance, FEVE offers a strong balance of:
- Chemical durability
- UV resistance
- Aesthetic performance
Other Advantages of FEVE Coatings
- Extended longevity: FEVE coatings are known for their exceptional durability, often lasting 60 years or more. In accelerated weathering tests, LUMIFON-based coatings have demonstrated up to five times the lifespan of acrylic urethanes and more than eight times that of alkyd coatings.
- Improved sustainability: LUMIFLON FEVE powder coating systems can significantly reduce environmental impact, lowering the footprint by 24-26% compared to liquid fluoropolymer coatings, depending on formulation.
- Superior appearance: LUMIFLON is a transparent fluororesin suitable for both clear and pigmented coatings. It offers a wide gloss range from 5–90% at a 60° angle, enabling flexible design control.
- Reduced lifecycle costs: Due to their high resistance to environmental damage, FEVE coatings require less maintenance and cleaning. This reduces lifecycle costs, as repainting is needed less frequently than with conventional coatings. Independent studies show LUMIFLON-based systems can reduce costs by 30–40% over 50 years. They can also help lower VOC emissions by reducing solvent use and conserving resources.
- Factory or field applications: In contrast to other commercial fluoropolymers, FEVE chemistry allows ambient cure, suitable for in-field applications. This is especially advantageous for infrastructure applications such as bridges, tanks, and existing structures.
Notable Projects that Perform in Extreme Environments
LUMIFLON coatings helped the Boston Lyrik Back Bay Project exceed coastal standards for façade protection. As part of the city’s initiative to improve coastal resilience, the project specified a level of infrastructure protection beyond typical coastal requirements. A two-coat PPG CORAFLON® powder system was applied to the exterior faces of the office tower and boutique hotel, consisting of an epoxy primer or base coat, followed by an FEVE-based power topcoat containing LUMIFLON FEVE resins.
LUMIFLON resins were used on the exterior panels of the Burj Al Arab Hotel in Dubai for their superior weatherability and durability. The fluoropolymer’s robust performance protects the façade from corrosion caused by water, oxygen, and chloride, making it highly resistant to the harsh conditions of the open sea.
LUMIFON coatings have demonstrated long-term durability in extreme conditions, including extreme temperatures, high humidity, salt exposure, chemical contact, and mechanical stress. They protect materials such as aluminum, steel, fiberglass, and concrete, helping buildings, vehicles, bridges, and aircraft maintain their appearance for decades. Lab tests, simulator studies, and real-world applications show that LUMIFON outperforms high-performance polyesters and other competitive materials.
Learn more about LUMIFLON FEVE-based products here.