Should write up a guide mate
just a few pics would help the masses
Thanks yea I didn't think to take pics in a step by step or anything. There are other tutorials out there, video tutorials are probably as well done or better since it gives a more thorough visual aid. This is one I found, pretty much the way I did mine (minus the colorful paper wrap insert for decoration). Video at the bottom.
They chose to start at the top, I started at the bottom. Heated it and once it shrunk around the bottom of the battery I waved the heat over it a few times to make sure the wrap was soft and pressed it to a wooden table and held it for a few seconds. Then went from the bottom up to the top allowing it to shrink as it went to reduce bubbling. Then repeated the same with the top.
I reused the factory insulator ring and it wasn't adhesive like the replacements I bought. The insulator ring kind of floats and has a chance of shifting so I centered it and pressed the tip of my thumb against the positive terminal through the hole in the insulator ring. That pretty much held it in place while shrinking the wrap up over the edges of the insulator. It wasn't perfectly centered but without doing that the insulator could shift far enough to one side to partially ride on top of the center positive cap and be really off center. No measuring or anything, I just used the wraps I got from IMR as is.
The wrap was almost centered from either end of the battery with just a hair extra overhang for the top (positive end). Only because the precut wraps were just long enough and I didn't want to risk the wrap being too short to securely hold the insulator ring. Not as big of a deal on the bottom since no ring there, so long as there was just enough to curl over the edges of the negative end.
One vid tutorial I watched the person used a small butane torch. Seems pretty risky, I guess in a pinch if feeling adventurous/brave but otherwise I wouldn't personally recommend that. Better to use a hair dryer or heat gun, safer and less chance of blowing the battery. Those pocket torches will burn 1500-2500F and if you're not careful will melt right through heat shrink (not to mention might burn/ignite the battery without extreme care).