Probond polyurethane glue?

[Derrick]

I have read a few threads here where probond has been used to sheet foam wings and glue spads together.
Does or has anyone used probond polyurethane glue instead of carpenters glue or ca to build their balsa planes?
A Home Depot by me carries it so I am going to pick up a bottle, was just wondering if I could use it for all my glue joints in a plane and not just for sheeting foam wings?

Thanks.

[AJCoholic]

Sure Derrick it is good for wood to wood (use it in my shop for certain application in furniture, like regluing chairs that are loose).

But it is more money, dries slower and you have the excess to clean up that oozes out the joint. For normal wood joints I would think aliphatic glue or PVA is just as good.

[Derrick]

Thanks Andrew.
I am still using a lot of CA but I have been using Titebond II on some stuff the past few months and starting to get used to waiting for it to dry. Was just wondering if the polyurethane glues were any different/better than the wood glues (ie Titebond/carpenters glue).

Guess I'll just stick with my Titebond and CA for my wood joints and when I do a sheeted foam wing will try the probond polyurethane.

[4*60]

You know it foams up and expands while curing?

[Derrick]

You know it foams up and expands while curing?

No I never knew that. I guess that is why it works so well on sheeting foam wings?
I will definitely continue to stick with CA and regular wood glue.

Thanks.

[Inroad]

The foaming is what makes it so good on foam,but the wings must be in the shucks and weighted for 24 hrs.If you cut some foam that has had a piece of wood glued to it you will find the pro bond has worked into all the cracks and crevices. As it foams any joint must be clamped,when I first tested it about 3 years ago I found it stronger than epoxy in some situations,like gluing aluminum to wood.Everything must be roughed up and the foaming action makes a real intense grip.One test I glued 1/16 balsa to white 1 lb foam then punched a hole in it and glued a large Robarts hinge in with Pro Bond.For a year every one that came to the shop tried to pull it out to no avail,even with half bent at 90 degrees for leverage.When it was cut apart there was a blob of probond foam as big as a quarter worked through the white foam,holds well

Gregg L

[Tomahawk]

My understanding is that it cures from the moisture in the air.
It also has a shorter shelf life than most glues. I can't remember right now but someone told me on another forum what to look for to make sure it was still good. If you get it from Home Depot, they seem to have a high turn over so you will probably will not have to worry about its freshness.
Just make sure it is tightly closed when not in use.

Chris

[LEE]

I like it for certain gap situations like gluing in anything to a foam core, especially wing tubes :D I use a spray bottle of water on most applications, since a wetted joint will foam up much more (and seems to cure faster). Just make sure to tape in places you don't want excess to ooze out as it is hard to remove once set, even with sanding :?