A few years ago I reset knife blades in hollow handles using pitch bought in a semi-famous NYC silversmithing/jewerly supply house. I relied on the master of the house. The results were not positive. I find that the pitch (all pitches?) is hydrophilic and that the blade tang loosens up over time. In trying to repair the problem I heated the handle and found that the pitch, on getting hot, foamed up and putting that “genie back in the bottle” was frustrating. I restarted with new pitch, heating up to the point where I drove off all the moisture, refilled the handle inserting the tang and let cool off. That worked for a while but the same loosening occurred.
So, my question is how to avoid repeating the same mistake. What are better alternatives to pitch.