The good thing about canopies is, if you knock one loose, you can easily glue it back on, so bond does not need to be super strong. White glue is okay (bad for windows in bombers or airliners, where window can end up inside fuselage if bond fails).
If you want something stronger look at those new glues that are set with a laser gadget. I have found they produce a pretty strong bond and do not fog transparent plastic. There has been quite a discussion on this stuff in either the tools or the techniques forum- forget which.