I didn't mean to come down on you so hard, sorry if I sounded so abrubt. I read my post afterward and it was a bit gruff. My apologies for that. A lot of guys do try and say it's actually this glue or that glue, and I can guarantee you it's not anything that has ever been in this industry before NWHT came out with it..
The secret with the Foam bond is not using an hour, a minute or two hours, it's waiting until it JUST goes clear. The other part of that is that the foam takes much longer to go clear than the balsa sheeting, because the balsa soaks it up and helps it dry faster than the foam. The last part of it is to make sure you've sanded the foam properly to break through the glaze left there by the cutting machines. That'll help the Foam Bond to soak into the foam much more easily. Before any of it, check out this page on the website, it should be a big help:
http://www.nwhobbytechnologies.com/foam_technology.htm