On Monday, November 30, 2020 at 7:00:11 PM UTC-5, RD wrote:
In article ,
says...
I am in the process of modifying a circuit by adding a small external
circuit board and then wiring into the main board. I don't want the
wires to move around when I'm done, but yet if I ever need to make
repairs, I want to be able to remove them. I see some people using hot
[snip]

Silicone. Lots of different brands & formulations
(RTV, Goop, etc.)

Dab a small bit on an unused corner of the board
and let it dry, to see if it can be peeled off
cleanly.

HTH
Look at Dow Chemical for silicon based products that are safe for electronics...I used some of their products in a similar application many many moons ago...damn if I can remember the product numbers...
J