What brand of race glass are you using? Here is a sample of some for you.
Graves has an awesome one that has adhesive on it. Don't let the price tag scare you. This is the best pad of all the seat pads I used and I've used several on the various race bikes I've owned. Great durability, comfort and awesome adhesive sticking power. Other brands start to break off in chunks and wear out fast, not Graves!