You have to seal plywood!

[Moon4wolfgirl]

Wait you have to seal plywood! Me and my dad built a cage with plywood (which took forever) and we only sealed the cracks and stuff like that.

[claudiusx]

Ideally.
But I've seen a few breeders who don't either.

I've not seen any scientific proof, but the theory is that the adhesives holding the sheets together could potentially off gas, especially in a heated environment.
And also that pine is toxic to dragons (in what dose/ duration who knows) and since plywood is typically made from pine sheets, it makes sense to seal.

-Brandon

[CooperDragon]

Sealing it can also help provide protection against moisture and extend the life of the enclosure.

[Aaradimian]

Another possible benefit is inhibition of mold and fungal growth over time.