Say, Pete, I am not going to answer your question but ask one. Do you not use the stuff from Wallyworld?
I do use it, but that foam is 2mm thick -- at least the sheets I've seen, and from as far up as Maine to as south as North Carolina (Eastern US), the Walmarts only carry 2mm foam (at least the stores I've been in). I'm looking for the super-thin 0.5mm-thick foam that wouldn't float a feather on a calm day... it may stink when it comes to boyancy, but the flexibility and yet stability is matchless when it comes to wrapping bodies and stonefly wing-buds.
Pipe-insulating foam is great, but doesn't have the cross-linked polymerization count I'm looking for (that's science- talk for "it has too large air pockets in it") ;) But believe you me, I do use pipe- insulating foam, too! Great beetle back material!!
Welp, off to yet ANOTHER meeting... oh the joys of working a 12 hour day and trying to finish ones graduate thesis...
Tight lines,
Pete
