On Sat, 10 Apr 2021 14:19:29 -0400, Tekkie©
wrote:


On Sat, 10 Apr 2021 16:31:07 +0000, HWFman posted for all of us to digest...


I'm in the Hardwood Floor industry. Years ago I use to use Penetrol in my oil based polyurethane, and it worked very well. It gave me more working time when I had to jump from one room to another then come down an ajointing part of the house such as a hallway and was able to go back over the doorway of each room without pulling
or dragging the polyurethane. It also flow out real nice. I always used Penetrol on hot days when I would coat a floor for the reason it gave me more work time before dragging or pulling the polyurethane when went back over it such as doorways etc. I wish I could still get it. But the Flood Floetrol CAN NOT be used in water based
polyurethane. Although there is an additive you can buy to slow down the drink time on water based finish. I'm not to sure who makes it , but I think Bona does.

I'm not sure, but, didn't you answer your own question?
From furnitureflippa.com:

Yes, you can thin water-based polyurethane using Floetrol however
there is now a risk your water-based poly can turn yellow over time.
Floetrol is designed for latex-based paints and is meant to improve
flow when applying using a brush or roller. Since water-based
polyurethane is already quite thin and flows quite easy it isn’t
necessary when applying using a brush or roller.

If you are working in a warm work environment adding no more than 10%
Floetrol to your water-based polyurethane could improve your flow
during application. But water could also do the same effect, so in my
opinion, I would stay away from Floetrol when using water-based
polyurethane, it isn’t necessary.



I'll disagree about the equivalency of thinning with water - Floetrol
and water behave significantly different as thinning / retarding
agents.