Expert: Eileen Cronk - 10/28/2008

Question
What is the minimum temperature for applying a polyurethanee finish

Answer
Hi John
Nice to hear from you.
I avoid using poly in temperatures below 65 degrees F.
Poly must "flow" after its applied and it will not do that in cold temperatures.
Keep the poly indoors to stay warm and not in a cold garage.
Funny enough, it can't be too warm either.
I had that experience this past winter while applying a poly finish in a living room with a wood burning fireplace.
It was quite hot in the room and the poly dried too fast and did not flow properly. So theres obviously a maximum temp too.
It works both ways.
I always avoid poly in high humidity too.
So thats the scoop.
Regards
Eileen