Why do I get bubbles in polyurethane, and do I get rid of them?
+3
6 answers
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![John Biermacher]()
John Biermacher
on May 23, 2018
I always dilute mine (which is oil based) with minerals spirits (2 parts varnish to 1 or 2 parts urethane varnish) and apply it by wiping with an old cotton sock. It takes more coats but they can be applied more frequently. Limited clean-up. I wear a disposable glove and store the sock in the polyurethane between coats. -
![Tanne]()
Tanne
on May 23, 2018
Don't stir or shake -
![Margaret Gavin]()
Margaret Gavin
on May 24, 2018
Could be the temperature of room too cold? -
![Desiree Suggs]()
Desiree Suggs
on May 24, 2018
You might have stirred or shaken the product or you might have brushed it on too quickly. You could pop the bubbles with a straight pin or let what you have already brushed on dry then lightly sand. Be sure to clean off residue after sanding then try again for a second coat - go slow -
![Kiturah Humphrey]()
Kiturah Humphrey
on May 24, 2018
Thank you all. No temperature warm, outside in the California sun. -
![William]()
William
on May 24, 2018
Hope you didn't shake the can. Gentle stirring is all that's needed. Using the wrong type of brush. I like to use a foam brush. Cleaning the brush on the container edge. You can burst any bubbles while it's still wet. Use a propane torch and pass the heat over the poly, bubbles will burst.
John Biermacher
on May 23, 2018
Tanne
on May 23, 2018
Margaret Gavin
on May 24, 2018
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