Hello. This is my first post here and I come shamelessly looking for help. I'm an Electronic Engineer and have an idea for an invention but do not know if the type of material that is needed exists, the only one I can think of so far is Bread dough. Anyway, what is needed is something that is 'sticky' and 'pliable' when warm and wet but is much firmer when cooler or dry. I'm hopeful that a certain sort of polymer must do this but know nothing about the subject. Any help gratefully received.