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Home / Shop / Welding Wire, Rods & Sticks / Gas Brazing Rods / Welding & Brazing Flux
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Brazing flux is a substance used to promote the flow of molten brazing filler metal and to prevent oxidation of the base metal and filler metal during brazing. It is typically a paste or powder that is applied to the joint before brazing. Brazing flux can be either active or inert. Active fluxes react with the base metal and filler metal to form a protective layer that prevents oxidation. Inert fluxes do not react with the base metal or filler metal, but they provide a barrier to oxidation.