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Prepainted Galvalume� sheet is ideal for a wide range of painted applications.
Especially when superior atmospheric corrosion resistance is required in pre-engineered buildings, architectural panels, siding, roofing (both conventional and standing seam) and many other building components.
In addition, this highly cost-effective product offers designers and users alike a wide variety of color options, design flexibility, long-term durability and ease of installation.
What's more, all prepainted Galvalume sheet products blend harmoniously with virtually all other building materials.
The metallic coated steel substrate
The trade name, Galvalume, is used to identify cold-rolled steel sheet products to which a
corrosion-resistant aluminum-zinc alloy coating has been applied. It is produced by a
process developed by Bethlehem. The Galvalume sheet coating consists of an alloy of 55%
aluminum, 43.4% zinc and 1.6% silicon, nominal percentages by weight, as listed in ASTM
Designation A792. On a volume basis, the coating is approximately 80% aluminum. The
metallic coating is applied by a continuous coating process whereby properly cleaned
low-carbon, cold-rolled sheet steel is dipped into a molten aluminum-zinc bath. The result
is a highly corrosion-resistant sheet steel that delivers the best protective features
characteristic of aluminum and zinc: the barrier protection and long life of aluminum plus
the sacrificial or galvanic protection of zinc at cut or sheared edges. More than three
decades of actual outdoor exposure have demonstrated that Galvalume sheet exhibits this
excellent combination of properties.
Premium-quality paint systems
A broad range of paint systems can be applied to this highly corrosion-resistant base to
enhance durability, add color and beauty, and provide creative options for design
professionals. Bethlehem's well-regarded reputation for premium quality is maintained
throughout. Bethlehem has instituted a process control program to insure that prepainted
Galvalume sheet is produced to prescribed standards. The program specifies the methods and
materials to be used in each phase of the painting process. Stringent product performance
requirements are specified, as well.
Chromate pretreatment: The chromate pretreatment provides a superior combination of flexibility and corrosion resistance compared to other types of pretreatments, like zinc phosphate or complex oxide typically used for prepainted galvanized sheet. Pretreatment coating weights are monitored using X-ray fluorescence measurements to assure optimum quality.
Approved paint systems: Many paint systems have successfully passed Bethlehem's performance requirements and earned their place on the "Approved List." New systems are continually being evaluated to provide the widest choice of advanced paint technologies. Paint suppliers who have developed these high-performance systems include Akzo Nobel, Glidden, Morton, PPG, Sherwin Williams and Valspar.
Long-lasting beauty and durability: Prepainted Galvalume sheet from Bethlehem, processed according to stringent specifications, is far ahead of competitive materials for architectural applications. Tough laboratory and atmospheric evaluations attest to prepainted Galvalume sheet's excellent long-term performance. With the availability of polyesters, silicone polyesters, fluorocarbons and plastisols, there is a paint system to match your performance and budget needs.
Prepainted Galvalume 1 
Prepainted Galvalume 2
Prepainted Galvalume 3 Prepainted Galvalume 4
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