The compound formed when aluminum oxidizes is white, not red and appropriately called aluminum oxide. This compound in it’s crystalline form is actually the mineral corundum which forms the extremely hard gemstones ruby and sapphire. Pretty fascinating stuff!
Once the roof is installed, the aluminum oxidation process would only occur to add a protective shield against further corrosion from any scratches or salt deposits that may happen beyond the Kynar coating. This process allows your new metal roof to appear brand new for decades to come. It is a great solution to coastal metal roofing projects and you can rest assured that your new metal roof will confidently stand the test of time!