How long does it take polyurethane coating to dry?

Polyurethane coating takes quite some time to dry all the way. According to professional floor installers, it can be two months or even longer, depending on the temperature and humidity conditions. It also depends on what the flooring is made of and if it is on the first floor or a higher floor. There are many considerations and factors that come into consideration. The oil based coating would be dry enough to walk on after a day and a half, but you shouldn’t put items and furniture back in the room for a few more days. If it is not oil-, but water-based, it might dry in one day, but be careful when walking on the floor or while replacing furniture.