You can use about any silicone where the pads touch the brake pistons. I have used clear, red, or blue over the years. It'll all work. I've never had any problems cleaning it off if/when I wanted it back off, and you'd be hard put to ever see it back there.
I also put a dib of it between the pads and the metal backers when they are present. I still have the OEM metal backers on mine. My Runes have them as well. I forgot to do the silicone on my Rune rear pads when I replaced them this spring, and quickly remembered why I should always do it. I took them back off this past weekend, applied the silicone, and VIOLA!, no more squawking.