What grease to use on brake pads?

[SloppyClock]

Copper grease, right?

I've heard a few people recently refer to copper grease no longer being the grease of choice due to galvanic reactions between the pad and piston.

What does the PH community think?

[SloppyClock]

Just to be clear, this is on the pad to piston side, not guide pins or pad to disc (which should go without saying!).

I've used copper every other time I've done pads, and have never really had any problems. Just put a pea sized blob in the center and smear around. More than often it lasts a fair bit, apart from track cars I've never actually owned a road car long enough to tell whether or not it will last the entire life span of the pad.

Was just wondering what everyone else thought!