Such a piece as low VOC urethane? I haven't shopped yet but can't find anything next to an internet...

I haven't shopped yet but can't find anything next to an internet search.
Answers:    yes within is
the reason why is you inevitability to look for no voc
Here is the conundrum created by low VOC materials. Low VOCs are by definition lower in volatile life compounds but they also off-gas slower. So, low levels over a longer extent. High VOCs generally off-gas quicker, so you hold high VOCs but for lower period. Sherwin Williams used to make low VOC paint, they may craft a clear urethane.
If you project allows, you could use regular urethane and then isolate the piece and blast it near ozone to hasten the off-gas and oxidation.