Hi. I am fairly new to polymer clay. I have been making a cuff which once finished I glue to a metal cuff blank, however with the gentle flexing of the cuff when you take it on and off, cracks develop in the cuff. I wondered if anyone has any suggestions on why this might happen or how to avoid it? In making the cuff I have a strip of clay on which I lay clay slices. I then lay that on a metal cuff to shape and bake. Because there are gaps between the clay slices I then undertaking a grouting process and rebake it. Once done I sand it and when done glue it to a new metal blank. I've use premo clay.

Any help will be greatly appreciated.