I picked up some TBII extended recently. I face glued a 1" piece of oak to another piece, clamped it for a couple minutes and then unclamped and slid the pieces around very easily to see how the open time compared with the standard TBII. I couldn't have done that with the regular stuff which dries too fast for me much of the time. I put a bit more glue on the pieces and re-clamped for about 3 to four hours. Then I unclamped and tried to break the bond. I couldn't. The next morning I picked up the glue-up and it practically fell apart in my hands! Not good! I figured I did something wrong, as the glue should be preemo stuff. Called tech support and they explained that by my having attempted to break the bond in 3 hours, I messed it up, even though it didn't budge at the time.
I tried another experiment. Fir end grain glue-up to fir straight grain. Dilute glue 50% with water and size the end grain. 15 minutes later, apply full strength glue to both pieces and clamp for at least 2
- 3 hours. 12 hours later I can't break that joint even by beating the hell out of it. Franklin rules! and I love the open time. :)
dave