We just finished sanding the hardwood floors and have put the first coats of sealer on. In OZ we can use two pack polyeurothane in private use (not in public facilities) but we opted not to use it. So we used a Product called BonaTech
a water based floor sealer from

BonaKemi AB,
Sweden. (go Ola and rege)

It has given us a beautiful finish, better than two pack in my opinion, so I highly recommend it. We are also going to use it on the slots.