Shielding/Foil Tape

[seilee1]

I'm working on some switches for a MIDI mallet percussion instrument (just using a cheap controller's brain and hooking up each key switch in the matrix to a homemade switch with no velocity sensitivity). For these switches, I'm planning on having three layers: a conductive strip on the bottom of the vibraphone-style key, another similar conductive strip below this, and then a thin open rectangle in the middle which separates the two strips but lets them touch when the key is struck. Anyway, for the keys' material, I'm using a roll of that thin rubber/plastic strip that they use for those rubber baseboards. I wanted to see: 1) if shielding tape is conductive on the non-adhesive side, 2) if the tape will adhere to rubber alright, and 3) if anyone had recommendations of good tape for this application (the cheaper the better).