Crown premium cold Galvanize coating 93 percent zinc rich provides corrosion protection to ferrous metal surfaces; first as a long-lived coating of practically Pure zinc comparable to that obtained by galvanization and second, through Sacrificial anodization. Both aerosol and bulk use Metallic zinc dust that is 97 percent Pure, which leaves 93 percent zinc in the dry film. The zinc fuses to metal substrates for protection equal to or better than hot-dipped galvanizing. This protection becomes effective when the surface is scratched, broken, or corrupted. With the presence of moisture the specialized in.