Permatex is a new one at least to me. The RC-56 (later bottles have the number RC-560) is good. I'm waiting for the glue to clear up on my H-9 Taylorcraft which it's doing slowly. Another good glue is PFM from IMP (Innovative Model Products). It is really thick like toothpaste and doesn't run like the RC-56 as it's clear out of the tube. I prefer it where the parts are wider and painted. It worked well on my H-9 Extra-260 as the canopy is painted and the flanges are wide.

Remember to wash the canopy before installing! Shaped canopies have mould release agents on them. If not removed the part will just come off later (normally on the first flight).

EXCAP232