My advice, assuming that they are the pads I am thinking of, is get rid of them. They are too hard and tend to damage the braking surface of the alloy rim. Plus, they do not seem to work well, especially in wet riding conditions. Anyway, that is what I recall. For road worthiness and safety, get new pads and go with that option. I stress the importance of this. I have been part of brakes don't seem to be working right and, by then, it might well be too late.