Quote Originally Posted by n00b 0f l337
Were did you buy those two things?
Home Depot has the Armaflex tape (gotta look hard though, since they usually hide it - it isn't listed on their Web site but that's where I got it), and the seal string can be obtained from various Internet places:

crazypc.com

xoxide.com

hardwaregods.net

I bought mine from crazypc, but I just realized you get two rolls for the $30 with the other vendors, so that's the better deal.

And here is a thread where I use these materials extensively for a phase change project.