i have soem medical grad super glue which has an excellent bond.the tensile strength for plastics is 3600psi and for metal 6000psi.going by the companies stats for tensile strengthe the bond is almost twice as strong as that Loctite 454.
i haven't lost a tip yet with it ans i did lose a couple with the loctite gel i was using.
i have 20 gram tubes for $20 shipped.