is a term used to explain rust on the cut edge of a steel panel. Flash rust is a minimal cosmetic affect that will dissipate over time. Flash rust does not void the warranty of your product and should not be cause for alarm. Steel is a more susceptible to flash rust in high humidity times and is increased when moisture is trapped up against the steel panel. To avoid or at least minimize flash rust, keep panels and trims dry before installation especially when wrapped in stret

TYPES of Substrates Coatings The substrate coating is one of the most important layers of protection applied to steel coils to help prevent corrosion. Two of the most popular types of substrate coatings in the metal roofing industry are Galvanized (G) and Galvalume (AZ). ​ Galvanized ​Galvalume ​100% Pure Zinc ​55% Aluminum/43.5% Zinc/1.5% Silicon ​Better Short Term ​4 Times Better Long Term ​No Rust-Through Warranty 20 - 25 Year Rust-Through Warranty TYPES of Substrates Coa