The product linked by MIKEWALTER seems to talk about how many ohms per square inch (0.05 ohms), but I assume they mean on the non-adhesive side.
As someone else referred to, I'd be cautious of the current carrying capability of the tape based on the Max posting regarding his small fire.
Creating a more perfect Faraday Cage relating to EMI occurring at very low radiated signal levels is very different than carrying current to run an O Gauge train.
-Dave