I agree on CA glue. Places like Tower Hobby have it as thin, medium, and thick. They also have accelerator spray. One spritz and the glue sets instantly. I also gets very hot, it will burn you. You could put some int he crack and spritz where is leaks out, plugging the hole. You could then fill the crack further. The instant set option is very handy for inletting errors. Just put a drop of CA, hold the chip down with an object and spritz. Done that fast.
For real breaks and structural stuff I still use slow set epoxy and all thread made from machine screws. Or sometimes real all thread If I have some handy. I have also used a machine screw with a nut started on the threaded end. That makes a steel dog bone that will never come apart once epoxied in place.