Originally Posted by Pleiades

If you're really worried about the squealing, then you could try some "Permatex Disc Brake Quiet."

It is really very effective, but quite hard to get hold of in the UK. I've used a fair bit in the past on early Girling disc brakes fitted to Triumphs and Nortons which were notorious for having rattly pads and squeaky brakes. It's a clever sticky blue compound that you put on the back of the pads and it adheres them to the piston, but doesn't actually set so the pads can be removed just as easily as before, if not more easily. It was originally designed for older car disc brakes that weren't fitted with anti-squeal shims.

Permatex USA

Available on eBay in one-shot sachets here