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http://www.sata-fluxes.com/product/alal-alloy-flux.html

Aluminum is one of the lightest metals in the world. It’s also very strong, extremely flexible and corrosion resistant. Light, durable and functional. Since aluminum easily forms compounds with other chemical elements, a huge variety of aluminum alloys have been developed. Even a very small amount of admixtures such as refining flux or aluminium casting flux can drastically change the properties of the metal, making it possible to use it in new areas. aluminum has become a symbol of progress: all cutting-edge devices and vehicles are made of aluminum.