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Roo glue with melamine boxes3/29
When i started building cabinets years ago in the first shop I ever worked in we used melamine and confirmat screws. I was fresh outta high school and had never seen either one before. I was told that's all you need with melamine is confirmat screws. Now in recent years people where I work are using "Roo glue" as well and freak out if they see me not using it. Do you guys think it really helps all that much??....I say no.
The glue is only as strong as its weakest link, which in your case is the bond between the melamine paper and the particle board.
I don't think it helps enough to use it alone.
I prefer to use 7/16"x 2" construction stapler and the glue or 2" regular construction screws and brad nailer.
If you are using conformats then glue is not needed. Not needed with dowels either.
Make a couple of test pieces with the various constructions. The stapled joints usually hold together better because they don't split.
Do one with screws and glue. After it drys take the screws out. Clamp it to a table and hit it with a hammer.
Give one panel in a confirmat only joint a good hit and you can shift the alignment. A thin bead of Roo glue keeps the joints aligned.
That is a good point, but who is going around beating up stuff after it's installed?
Do some glue and destroy tests with Roo and PL premium. I switched to PL. It does hold better than just screws alone but I don't use it now we use confirmats. We dowel for alignment to make assembly quicker then screw with confirmats.