I half-broke the antenna (did not completely snap off but was hanging by a bit) of my FP Bruticus (see second pic: at the base of his left antenna you can see a shimmering speck of glue residule) and the guys recommended Loctite 406 (product info). Be very careful and super mature with the stuff as you can really hurt yourself (Mod please delete this if you feel that it might not be appropriate).