Flows well, absorbs moisture well, melts and sets very quickly. You see, over the years I've used a large supply of silver-tin-lead-free resin core solder that I used to buy from Radio Shack and it's been really good too; then I went and bought some more silver tin cans from Bernzomatic a few months ago and it was just awful. Difficult to absorb, doesn't flow well, chars my soldering iron tip (I had to buy an ammonia block which I _never_ needed before), you get the point. Switching to this lot was like going back to the old lot, only better. Definitely recommend.
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