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Old 05-30-2012, 09:35 PM   #21
DeafSmith's Avatar
Jan 2009
Richardson, TX
Posts: 1,448
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Originally Posted by tre9er View Post
Some other members have chimed-in that it's difficult to get the foam to actually expand from just a few entry points drilled in the lid. I'm thinking cutting the top layer off of the lid, filling with foam, then replacing/caulking the lid back together is a possibility...but I use blankets and last brew might have lost 1.5* over 65 minutes.
I tried the foam - Great Stuff for Windows and Doors - it expanded inititally, then collapsed back into a liquid - ended up being useless.

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Old 05-31-2012, 12:37 AM   #22
ChemE's Avatar
Mar 2008
Columbia, SC
Posts: 596
Liked 17 Times on 10 Posts

Originally Posted by TimpanogosSlim View Post
Also worth stating that the cooler lids are often just hollow plastic. Some people use expanding urethane foam ("great stuff" - cracks and gaps version) to insulate them.

I keep meaning to try that, but haven't gotten around to it yet.
Yup, I did this too right from the word go. I had no trouble getting the Great Stuff to fill my whole lid. Every little bit of heat retention helps in my book!

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