Uniweld P4KD9S Aluminum Soft Solder Kit with Metal Tip Flux Applicator Soft solder kit for joining aluminum to aluminum and aluminum to copper or brass Kit includes 2 oz bottle of flux, 10 ft coil of aluminum solder, and metal tip flux applicator Melting point of 500F 20,000 psi tensile strength Metal tip flux applicator makes it easy to apply flux in tight spaces and makes it possible to add more flux without melting the applicator