I have done a few mods to a PCB with 36 gauge mod wire. Obviously this wire is so thin that it only takes a few bends back and forth to break it. What is the best way to secure this in place on the PCB? I have tried super glue but that makes a mess because it flows too easily.
At work I use Dow Corning 3145 RTV silicone adhesive for this very purpose. We also use it to secure flex cables in their connectors, secure right-angle parts such as capacitors to the board surface, fill small gaps to make the product waterproof, electrical component insulation, and so on. It is chemical-resistant, water-resistant, corrosion-resistant, non-conductive, and sticks to just about anything. There are many different uses for it, and in my opinion it is absolutely indispensable.
And to prevent this from being a specific product plug (I am not affiliated with the company in any way, I just like the product), I will say that just about any silicone adhesive designed for printed circuit board use will probably work great in this sort of application.
Enamel paint. (Nail polish might even work in a pinch.)
Hot glue for larger wires.
Use a needle which you dip into the super glue to make tiny glue dot and (right angled) tweezers to keep the modification wire in place.
Or use hot melt; same procedure.
Hot melt has the benefit you can melt it again and you can kind of control the cool down using your hot air station.
Our PCB EMS facility used wire similar to WW AWG30 or smaller , soldered and Loctite bonded with 1 part instant adhesive for strain relief from vibration. 1 glue dot per 5 cm.
I prefer annealed magnet wire. AWG30 or smaller.
I was Eng Mgr for C-MAC WINNIPEG and global Design Services Mgr with over 100 factories now all sold twice and owned by the largest EMS provider overseas.