I have just replaced the rear discs and pads on my 04 2.0dti Estate(thanks to advice from this forum!). The problem is that I found the large rubber seal around the piston to be in poor condition. I got some new ones from my local dealer, but could not find a way of holding them in position. I can only assume that they must be glued, if so what sort of glue would be suitable? I would welcome any advice!