Have any of you ever used a heat gun on your shrink caps? I've got an electric heat gun I was thinking about trying. (it's like a high temperature blow dryer) Usually use it to shrink sheathing on wiring harnesses.
I used to use the boiling water. Works fine but I kept burning my hands. I now use a heat embossing gun. It works pretty good. It is one similar to THIS ONE. The wire tool shown above with the boiling water works pretty good to. Your heat gun might work if it don't get too hot. I tried mine and it would instantly melt the shrink.
I have used a wagner heat gun for over twelve years. The technique has become second nature. A combination of rotating of the bottle and distance from heat source is key. To avoid the foil on the top from sticking up after heating, i use my palm to hit the top of the bottle after each heating. I am used to it but it can be quite hot to some people, so use a cotton glove or even paper towel. Short of an expensive heat tunnel, this is quite affective.
Well I think everyone pretty much covered it. I've used everything from a blow dryer, heat gun, and even a butane torch. The key is balancing how hot your heat source is with the appropriate distance from the shrink wrap.