Quote:
Originally Posted by JamieGeek
They aren't very thick (maybe 1/4" - 1/2" if that) and appear to be a urethane or "rubberish" material. For many owners they've peeled right off (another issue entirely, speaking of which I should check mine at the next opportunity). Much like heat-tape, these are about as insulated as heat-tape.
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And they also function with the knowledge that heat rises. That is the reason that they are applied underneath the tanks (actually a poor location, because they can get ripped off by whatever flies around there - like it happened to mine), and not in the rather protected areas on top of the tanks.