The most popular coatings for metal panels are PVDF (Kynar 500®), Silicone Modified Polyester (SMP) and Polyester. Of the three, PVDF coatings provide the best protection against fade and chalk and are proven to provide the best long-term performance.
Long recognized for their ability to provide long-term protection and durability, PVDF resin-based coatings offer homeowners and commercial building owners beautiful, long-lasting roofs that retain their curb appeal year-after-year.
Kynar 500 vs SMP - Actual Field Performance
Still not sure which coating is right for you? Let’s look at some real-life examples to showcase the difference in performance. Both PVDF (Kynar 500) and Silicone-Modified Polyester (SMP) panels were installed on this home in Louisiana. On day one, the colors were an identical shade of green.
The accompanying photo, taken only eight years later, tells a powerful story of the differences between the paint systems as it highlights both chalk and fade of the SMP paint system. Note that there is no visible fade or chalking on the darker (PVDF) panels.
The image below highlights actual samples of Kynar 500 coatings that have been exposed to nature’s elements on a South Florida test fence since 1967. The top portion of the color chips, identified as “unexposed”, were covered and protected from the elements. Note how little color change is evident over 50+ years of exposure.
As indicated above, high performing substrates and coatings are important when long-term performance and aesthetics are important. Warranties are also a consideration when selecting a metal panel. Consumers often associate warranty with dependability and performance.
This is not necessarily the case. Just because a warranty has an extended time frame (45 years or even a “lifetime”), it does not necessarily mean that the warranty is better or that the product offers better performance. We encourage you to fully read and understand your supplier’s warranties.