I've used several of the super glue gels for fletching carbons with feathers and haven't had any problems since I figgered out how to do it. I run a bead of glue down the feather's quill and then spread it out evenly with a toothpick before applying it to the shaft.

But that was then and this is now... Nowadays, I don't use anything for fletching feathers except Bohning fletching tape.