I use a Scripto utility lighter, they have two types, one has a flame like a blow torch (windresistant)and the other has a soft flame (the original) which works better because the flame wraps around the sleeving and shrinks all sides at the same time. Works better then any heat gun.

http://www.scriptousa.com/lighters.html

 

check ebay, they are 10-20 bucks

 

I had to do some wiring work on my bike last year and I don't have any power in my shed so I bought a gas powered soldering iron,cost £20 in an electrical components place,well it has been the most useful tool I have bought in years!,soldering,shrinking,heating seized bolts,moulding plastics,I have used it loads.
Being small (about the size of a cigar) and not having any trailing wires makes it much nicer to use andit can used so precisely that you have no worries about setting anything on fire,refills from a standard lighter refil can.

 

hair dryer or lighter but remember to keep the flame off the tubing or it will burn and harden it

 

screwed up, delete

 

screwed up, delete

 

screwed up, delete

 

screwed up, delete

 

FastHarley

I do wiring on bikes and I agree. They do not last if you use them lots like me but that is about 25 H.F. Units to 1 Snap-On. One guy borrowes your Snap-on & does not bring it bach compaired to 1 $10 unit. If you make a living and you use em' lots for around 12 years, you are at your break even point. Snap-On is a better unit and you can proudly show it. Your call.

 

It makes no sense to go cheap on tools. Go to Home Depot or order online a tool like this:

Dual temp, many uses around the house/shop. Heavy duty. Amazon $62 free shipping. LINK