Too cold outside, off work for the week. So kitchen engineering. I have been playing with putty.
The sculpy 111, cooks at 275. Well that allow it to bond in a pressure cooker, at 15 psi. Which I ran some tests.
After 2 hours of hard boiling, the water is clear. The pieces is solid, but will delaminate where colors are pressed together. This is the lower strength sculpey 111.
Most remarkable it that sculpey 111 will cure under water in a pressure cooker.
Pvc pipe meet pvc polymer at 260F at 15 psi. It bonds COMPLETELY. About as good as epoxy. It can be sanded, carved.
The red dotted piece is a pic coupler. It shrank slightly, in the pressure cooker, and cracked at the joint. The polymer putty, does not adhere to its self if cured and re heated.
I fixed it with a hot glue gun.