I'm trying to calculate the possible resistance of a graphite sheet that I'm using to coat surfaces of metal conductors, protecting them from wear, welding, and other possible failures. I can't seem to find an accurate value for the Resistivity, some sites state it's 7.8E-06, while others 3 to 60E-05 ρ(ohm m). I'm not certain. I don't have the material and instruments to measure it either. Do any of you know the approximate value? Or a good reference that cites it?