T-pcm Al-52 (ex Thermaphase on Aluminum Foil) — electrically conductive?

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Hi everyone!

For coupling diodes to the heatsink(*), I'm looking at T-pcm Al-52 (Formerly Thermaphase on Aluminum Foil), which seems to be a quite effective thermal interface, but is it also electrically conductive? Their spec-page don't tell anything about it...

Thank you!
david

*) it is for the PS v3, following 6L6's instructions. Thus, it may be an advantage to isolate the diodes from the sinks, but it's not "must-do"... I'd still prefer to.