Titebond Polyurethane exposed!
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
Update on Titebond Polyurethane Glue
To follow up on my original test of Titebond Polyurethane I have some more recent information and tests that you guys and gals may be interested in. After numerous failures while performing comparitive tests with TP glue I decided to call Franklin about the problem. The gentleman I spoke to asked me numerous questions about how I was using the product. I seemed to have passed his tests because he could not explain the reasons for the failures I had experienced. He offered to send me another container of TP and I accepted. When the glue arrived, I repeated the same tests as before. That was a T joint using 3/4" ply. I carefully dampened both pieces where the jint would be and applied the product to both pieces and clamped being careful of not getting too much squeeze out. After curing for 24 hours I put the test piece in my vice and lightly hit the vertical piece with the palm of my hand. It popped like a carrot right down the middle of the joint leaving both poeces undamaged. I swear that paint may be stronger. In view of my tests, I would recommend that this product be avoided.
Gene