I have a feeling De Foezel is working with a low VOC epoxy over in the Netherlands as thats all they've sold for the last 5 years+ over there. Most low VOC epoxy systems are fully done out-gassing in 72 hours. In the US we are well on the way to establishing low VOC products.

The stuff I would worry about outgassing FOREVER are any Urethane sealants, Stains etc... Most epoxy's fully cure pretty fast.

Nate