There are two different types of paint systems used at Bulldog Steel: Kynar and SMP. The Kynar system is a specialized type of paint that costs more than the SMP system but reaps a few extra benefits. Both paints are applied to coil and sheet metal and both are a 40-year paint system. At Bulldog Steel, we use WeatherXL from Valspar as our preferred brand of SMP paint. For the Kynar paint system, we use Western States which is located in Arizona. Let’s break down more differences between these two paint systems used on our steel.
Kynar or Kynar 500 is not a finished paint. It is a version of PVDF (polyvinylidene fluoride) paint and the two names are sometimes used interchangeably. Kynar or PVDF paint is a resin-based that offers ultimate protection against extreme heat, humidity, color fading, and gloss loss. This paint is considered top-quality and the most long-lasting. This means that steel treated with this paint system is also glossier than standard paints (unless a matte finish is specified). Bulldog Steel uses the Kynar paint system from Western States, based out of Arizona.
On the other hand, the SMP paint system is made of polyester and silicone. The silicone in this paint helps to improve the glossiness of the steel and increases resistance to elements like heat and extreme weather. The higher the silicone content, the better the paint will protect the steel. While SMP paint is still a fine option, it is more likely to have color fading from exposure to UV rays over time. This fading is also referred to as “chalking” and the color red is the most susceptible. While SMP paint is scratch-resistant, it is more prone to breakage. PVDF paint has the opposite problem because it is softer, it is less likely to crack but is more prone to scratches.
So when would you want to use each type of paint system? While it is really up to the client, Kynar or PVDF paint is typically used for a building that is more focused on aesthetics or attractiveness. This would include buildings like homes or office spaces. This is because the Kynar and PVDF paint systems usually have more vibrant glossier colors. Additionally, Kynar is also typically used on roofs because of its protection against UV rays. SMP is probably used more in industrial or commercial structures that need that scratch-resistant factor over looks. This would include something like an agricultural building or warehouse. SMP also might be preferred for side paneling because it is not in the direct line of the sun.
While SMP panels are sometimes considered to be of lower quality than PVDF, they do have a longer guarantee. Kinda. When it comes to warranties for SMP panels, the most common duration is 40 years. While this appears to be excellent at first, a deeper examination reveals that only film adhesion is covered for 40 years. For PVDF panels, warranties range from 20 to 40 years for film adhesion. When it comes to color change, the color is most important. For chalking and fade coverage, expect a warranty of 10 to 30 years.
If you have any questions about our paint systems or would like to learn more, please contact us today! We would be happy to help.
