This is a coated electrode for the arc welding of aluminum and aluminum alloys. Our electrode produces strong, dense and porosity free welds. It can also be applied with an oxyacetylene torch. Perfect Pass 444 S is exceptionally stable arc operates at low amperage with minimum spatter and fuming. Weld deposits have good color match and corrosion resistance. Used for fabrication, maintenance, repair of machining errors, build-up of worn sections or castings, extrusions, plates, truck/bus/automotive parts repair, tanks, ladders, shelves, refrigeration equipment, foundry patterns, and many other aluminum structures. Ideal for heat-treated aluminum parts and irrigation pipes!