I'm not sure. It's a plain metal plate with a thick layer of paper on the top, attached on the two long edges with some sort of two sided tape.
If I take off the paper the remaining sticky stuff should be strong enough, but most of the metallic parts on the mobo will be connected by the backplate (not sure if it's actually conductive material, but being metallic, I wouldn't trust it).
If I leave the paper on, I have to use my own glue, and have a flammable layer on the plate facing the CPU at all times, which doesn't sound like a good idea either.