I edge glued three pairs of 4" X 4" squares of imported 3/4" oak ply using Titebond Polyurethane, Titebond Original Wood Glue and Titebond 2. I placed each pair in a vise after a 24 hour cure. I hit each one with the heel of my hand in an attempt to break the joint. The poly glue joint broke down the middle with a firm rap, quite easily. The Original wood glue was significantly stronger but breakable. Very little tearout of the 11 ply plywood on either glue. I was not able to break the Titebond 2 joint no matter how hard I tried. The Titebond 2 is clearly superior to the other two glues. I tried the Poly glue again and same thing, easily broken right down the middle with little if any tearout. Snapped just like a carrot. I'm not sure if Gorilla glue would be any stronger, does anyone know? Titebond Poly glue is dissapointing at best.
Gene