Complex chemical compound in the form of a very fine powder|Mixed with alcohol (methanol/methyl alcohol preferred) and brushed on the weld joint|Formulated to shield the back of the weld joint from oxygen, dissipate heat and unwanted oxides, and to clean the surface of the metal|Aids in the flow of filler metal over base metal and form a protective barrier to prevent re-oxidation and heat scale|For stainless steel, (except 309, 310), precipitation hardening steels, chrome-moly steels, other alloy steels with nickel content below 25%