This preferred flux composition for Hot dip Galvanizing. It contains highest purity of zinc ammonium chloride & additives for viscosity control. This gives controlled bonding of article is before entering into zinc kettle & assures consistent zinc coating with smooth & brighter finish. It is a fumeless flux which not only covers the entire bath surface to protect the zinc oxide formation but also take care of the rejection during the ash inclusion. And lastly the flux does not give smoke which makes it very convenient to use in a very healthy we king atmosphere.