I have never used the heat shrink tubing before, but would like to use it at all my speaker wire terminations to clean things up a little bit at the ends. I don't have a heat gun, and would prefer not to buy one since it is something I would almost never be using. I know its only like $20-30 but would still prefer to not get one.

Is there a way I can shrink the tubing by another method? Thanks in advance.