Originally Posted by lazybean
McMaster Carr list its temp rating as -60 - +180 F.
Thanks to all for the info.
I'm going to make another insulation - some reason, when I push on mine, they don't "pop" like a new piece does.
Guess I just wore it out.
Only thing different, will put a heavy cloth barrier between mash tun and bubble wrap
Will do 3 layers of double-bubble.