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Old 05-30-2012, 09:35 PM   #21
DeafSmith
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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
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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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