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Tin-Zinc Alloy is applied to both sides of Freedom Gray Copper Sheets and Coils allowing for production of gutters and downspouts. This allows complete coverage and eliminates any voids that may be missed. A pre-weathered...Read More
Freedom Gray Copper is a proprietary finish with a special alloy. It is standard architectural copper produced in accordance with ASTM B370 that has been coated both sides with a proprietary tin/zinc alloy. Although the coating contributes to the product’s excellent corrosion resistance, it is applied for aesthetic purposes only. The finish provides a soft earth tone gray color that you will notice with Freedom Gray Copper. The tin/zinc-coated areas will prevent the substrate copper from oxidizing and producing green patina stains normally associated with uncoated copper. However, like other gray metals Freedom Gray Copper can produce a gray or black stain on light colored masonry and unpainted cedar shingles.