How do I fix this? (woodwork related)

[universalexports]

well I made my wavy cabinets today they are turning out great, however I got an issue,

as you can see in the pic the Birch I used had a hollow spot under the top layer? it goes all the way though, how should I fill this? wood putty? liquid nail? any suggestions?

[Gone Kayaking]

I'd be tempted to use bondo or some kind of epoxy to fill it.

[vikx]

Gorilla glue and a plug to fit. You could even do more than one plug if it was easier. Just sand the result. Be careful to use a sparing amount of Gorilla glue so it doesn't "grow".

[dawgpound]

I usually use a matching color of Famowood filler. Force it the void ends, making sure to get it in at least 1/2" or more. Let it dry and lightly sand it smooth.

[schweetcruisers]

Ahhh you gotta love voids! I would use a product called Quickwood Epoxy Filler. Any of the methods listed above will work but this is what I would use!

www.rockler.com/m/product.cfm?page=2358

[persimmonpal]

I dont think I would go with Gorilla Glue.. If you put too much in it may expand and put outward pressure on the ply.
I would tape the botom, set it upright and mix some 5 minute epoxy... Pour ot in just to the top, and presto you are all set. That would probably be the strongest part of the whole board!

[kathleenc]

I heard you could mix wood glue with sawdust from the same type wood and get a good match.