Solder for 14 gauge speaker wire. It went well and ended beautifully. However, I see no way to use such an expensive material in non-critical applications. If you are making a single solder point in a sensitive circuit, this solder may be required. However, if the connection made is one of several, you are wasting your money. I'm using this solder out of curiosity to see how it works and haven't noticed any noticeable difference between this and any standard solder.
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