I ordered some up and used it for the inserts. As soon as I smelled it curing I knew it had to be C.A., that is, cyanoacrylate, or, more commonly known as "Super Glue". So I checked with the techies at GT. They said, yep, it's Super Glue. I'd guess it's the medium wt. I haven't found it to work any better than any other insert glue.
As for your fletching, if you're using feathers, do yourself a favor and go with the fletching tape. Quick, easy, no muss, no fuss! Just clean your shafts with naphtha first. As when using glue for fletching, put a drop of glue on front and trailing edge of the fletches. Be forewarned that once the tape touches the shaft, it's stuck firm. There's no moving the fletch, so be sure it's where you want it before pushing the clamp held fletch to the shaft. (BTW: the naphtha cleaning tip comes courtesy of Rod Distefano.)
Oh, the fletching tape doesn't work with vanes.