Interesting... I've been wondering about this myself. Zap-a-gap is not available in Australia so I got some sent over the pond. It is definitely different to the usual "superglues" we have on the hardware shelves. Mostly it feels a little runnier, but the main thing is that it seems to last much better once opened. I'm still on a bottle I opened about six months ago and I would have gone through several others in that time frame. I really like it!