Its pretty much the same stuff used to heat pipe in the winter.
I use a thermostat with a heat probe in a rack system.
The heat probe is taped to the heat cable to always get a good reading.
In my opinion heat cable is much safer then heat tape and is more consistent along the length of the cable.
Just remember if you use the stuff. usualy the first couple feet is dead and does not emit any heat.
Hope this helps

[ Show Entire Thread ]