Englert offers exclusively, are produced by coating steel with a special Aluminum-Zinc alloy that provides more than twice the corrosion resistance of galvanized steel by delivering the optimum combination of the features of aluminum and zinc. Metal Sheet is an ideal roofing material because of its strength, extraordinary outdoor corrosion resistance and longevity. Metal Sheet is offered in both bare and pre-painted versions. Galvalume Plus can be roll-formed dry without vanishing oil, making it much easier to form and install safely. Galvalume Plus is the same bare Galvalume product with a thin, clear acrylic coating.