A very easy-to-use aluminum alloy with non-corrosive flux inside the wire; no external flux is required with this product. Designed for the repair of heat exchangers, air conditioners, aluminum alloy condensers and other applications. Very good fluidity with good capillary attraction. Post-braze cleaning unnecessary. Better than tin-zinc and aluminum silicon alloys for aluminum coil repair. Harris® Brazing Filler Metal, Series: ALCoR®, 2 mm Dia, 36 in Length, Chemical Composition: 98% Zinc and 2% Aluminum, Applicable Materials: Aluminum to Copper