The present invention concerns a concentrate comprising at least one brazing flux, at least one binder and water in a specific ratio; a process for the manufacture of a brazing flux paint composition which comprises the steps of a) providing the concentrate and b) mixing the concentrate with at least one liquid carrier; and a process for brazing of parts of aluminum, aluminum alloy, in particular aluminum alloy comprising magnesium, steel, copper and titanium with parts of aluminum or aluminum alloy, which comprises the process for the manufacture of a brazing flux paint composition.