Choosing Your Finish (Galvalume or Kynar 500)

At www.metalbuildingparts.com we often receive inquiries about the differences between the finish systems we offer on our metal panels and trim. A majority of inquiries ask what is the difference between galvanized metal panels and the Galvalume panels that we carry. Galvanized panels are those in which the substrates are coated in zinc, whereas Galvalume substrates are coated with an alloy of zinc plus aluminum. Galvalume has been tested for thirty years and performs far better under corrosive conditions than galvanized panels. The patented combination of barrier-resistant aluminum and corrosion-fighting zinc is what makes Galvalume four times more durable than galvanized panels. Galvalume is ideal in outdoor environments and performs exceptionally well in harsher northern climates and marine locations. The coating system (or paint) for the metal panels is just as critical as the substrate (galvanized or Galvalume). For the life of the panel, the surface coating will be exposed to environmental elements including the ultraviolet rays of the soon, acid rain, dirt and debris. Over time, these environmental conditions will break down the surface coating resulting in color fade and “chalk”. Color fade and “chalk” is not aesthetically pleasing, and the degree of fading and chalking is directly related to the surface coating system. The three most common surface coatings for metal panels are Kynar 500, Siliconized Polyester and Polyester. Of the three, Kynar 500 provides the best protection against fading and chalking. For this reason, at www.metalbuildingparts.com, we only offer metal panels and trim in Galvalume and/or Kynar 500.

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