DBP Sorghum works remarkably well when used right as 8178 has specified. A couple of years ago I had occassion to cut into a oft flown flying boat built in the early 70's that used Sorghum to attach 1/16" balsa sheeting to its foam core. The blasa would not separate from the foam anywhere, instead tearing out chunks of foam wherever the sheeting had to be removed. As near as I could tell, the bond was still perfect after all those years.

That said, Sorghum does not like continued exposure to heavy moisture and will eventually separate if so exposed. Film covering and long term storage in a relatively dry environment will prevent any problems. (The flying boat was glassed over the balsa and so the bond wasn't exposed.)

Sorghum remains my contact cement of choice for foam and balsa wings.

Back to building the Blue Angel ...

Tony