I use Heat Shrink tubing every single day. Nothing finishes off an install like having every connection protected nice and neat.
I've finally gone ahead and made my own- This is the EXTREME shrink stuff- it shrinks more than 2:1, closer to 3:1, so it really snugs down on those solder joints and gives you awesome protection.
I've made up a bag of all the sizes I use daily and left out the stuff you don't need. If you're busy this is a several month supply, but for most of us this bag will last years.
Each piece is cut 1 5/8" long.
You get the following:
100 pcs of 1/24" tubing- Perfect for shielding the little coil tap wires- once shrunk won't fall off!
50 pcs of 1/12" tubing- perfect for single wire connections
30 pcs of 1/10"- best for single wire/stranded connections
25 ps of 1/8th"- I like for adding strength to the ends of leads that solder to the switch.
20 pcs of 1/4"- nice to run two leads through as we do on pre-wired pickguards
20 pcs of 1/3"- this will accomodate two thicker cloth covered wires.
20 pcs of 3/8"- nice for shielding small caps or running up to 6 solid core wires through
20 pcs of 5/8"- The big boy can shield larger caps and let's you run all 6 pickup wires through- for the final bit of wiring on a Strat
Why spend more- I've found this manufacturer to make the best stuff.