The WORST Ca glue I ever used was Hobbico Bullit (which they don't make anymore). Years ago, I built up a Klingberg Wing and then had to put it on the shelf for a few months. When I started working on it again, the wing came apart in my hands.
The Bob Smith brand is the same stuff lots of hobby shops re-label and sell as their own brand. I've noticed that they are slow to set too. I tossed them.
I use Great Planes Pro CA now for the few planes. Seems to be as good as Zap.