Looking at the MSDS, it's ca glue with a "trade secret" extra ingredient. This ingredient must be what slows the cure and makes the dried glue permeable to oils / stains. The fact that the dried glue will absorb oils and stains would make me very reluctant to use it as a finish for pens.
It sounds like it has the same issues with not being good for filling gaps as regular CA, so it wouldn't be any better than regular CA for gluing tubes. Except it would be a little slower to cure. I guess that's worth something to people who regularly get their tubes stuck halfway in the blank.
Seems like pretty pricey stuff. Almost $8 an ounce. That's more than twice the price of regular CA.
If I was still building furniture, I might give it a try, but I don't think I would use it for critical joints until it had been successfully used by other people for years. There are few things worse than having a piece of furniture fall apart because a joint failed (not that this ever happened to me....I'm just sayin.....:redface
Ed