You struggle for an hour for a bond and in the end, you don't get any work done.

UPDATE: I looked it up and it turns out that this solder is not suitable for bonding cables/boards, etc... it is probably for metal soldering. It contains 70% lead and 30% tin. However, for it to be suitable for boards, etc., solder should have 60% tin and 40% lead. In other words, this is highly unsuitable for electrical/electronic purposes. Of course, if you are a professional and have a good soldering iron, you might be able to bond something, but some will come undone.