ZRC Protects National Historic Sites The National Park Service uses ZRC Cold Galvanizing Compound to prevent rust at historic sites in harsh climates. ZRC protects the original wrought iron ornamental fence and early 20th century chain link fence at the Edison National Historic Site in West Orange, N.J.; ironwork at the lighthouse of the Castle of El Morro in San Juan, Puerto Rico; and 1880s railing and posts at the Mulholland Point Light Station at the Roosevelt-Campobello International Park, Campobello Island, New Brunswick, Canada. ZRC is also used at the Salem Maritime National Historic Site in Salem, Mass. Because of its 95% zinc content and true cathodic action, ZRC protects exposed metal even when it is scratched or damaged. When zinc is in contact with iron or steel, the zinc slowl

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