Z-T products are coated on both sides with Z-T Alloy that is said to offer the advantages of copper or stainless steel with a naturally weathering earth-tone gray. FreedomGray and Independence Gray/TCS II/TCS II Satin Z-T Alloy consist of three layers: zinc-tin alloy with satin finish, intermetallic layer, copper (99.5% pure) or 304-stainless steel. The coated products can be formed, installed, and subjected to sub-freezing temperatures. Applications include those that would use copper or lead-coated copper. Common underlayments can be used.
Revere Copper Products Inc., Rome, NY