Pigments, Resins and Carriers Part III
Carrier – This is the part of a paint system that you never see! The carrier gives proper fluidity, assists with adhesion to the substrate, and adjusts the speed of evaporation / drying. When the metals used for roofing are painted, the carrier disappears during the heat curing, or “baking,” process.
In many cases, distributors and contractors handling metal roofing are completely unaware of the various paint systems. As a result, they may anecdotally make performance claims which are unrealistic and misleading. Homeowners considering a metal roof should always know and understand the chemistry, attributes, and expected performance of the finish on the product they choose. Manufacturers and contractors who care about the metal roofing industry will gladly explain and guide homeowners through this process.