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Old 09-04-2008, 12:55 PM   #1
cactusgarrett
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Default Expandable foam insulation

I'm looking for some insulation that i can "inject" into the lid of my 12gal cooler MLT. Currently it's hollow and i can feel the lid heat up significantly during a 60min mash.

So my plan is to inject some expandable foam or some type of insulation which would harden/dry. Does anyone know of anything or have any experience with something that could fit the bill? Preferrably something i can get at THD or the local hardware store.

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Old 09-04-2008, 01:02 PM   #2
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A product called 'Great Stuff' will do the trick.

Alternatively, you can lay a piece of closed cell foam on top of the grain bed to minimize heat loss.

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Old 09-04-2008, 01:47 PM   #3
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Make sure you get the low expansion version though or you'll mutilate your lid by bowing it outward. I'd recommend using the plastic straw like nozzle. Turn the lid sideways and drill a hole big enough to fit the nozzle in. Fill it a little and let it expand. Fill some more, etc etc. Give it time to fill upwards towards the hole because I suspect if you fill it all too quickly, it will try to expand sideways and bow the lid.

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Old 09-04-2008, 01:50 PM   #4
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Just a little at a time. I did a hollow metal door frame that oozed for days onces because I got too much in it.

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Old 09-04-2008, 02:54 PM   #5
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Quote:
Originally Posted by jcarson83 View Post
Just a little at a time. I did a hollow metal door frame that oozed for days onces because I got too much in it.
Lucky you, I got a good enough seal with the trim on our laundry room door that the 3x foam I used blew the frame of the door. Actually BROKE the 1x3 door frame.

Good Luck.
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Old 09-04-2008, 04:06 PM   #6
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Lucky you, I got a good enough seal with the trim on our laundry room door that the 3x foam I used blew the frame of the door. Actually BROKE the 1x3 door frame.

Good Luck.
same here ,,,all the work to fix it then blew it up
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Old 09-04-2008, 04:32 PM   #7
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Latex foam, not polyurethane. Latex foams are sold as "window & door" insulation. They expand less and cannot generate the pressure polyurethane will. Also, since it does not become rigid, there is less chance of a permanent wrap.

I'm a nut about insulation and nothing is better for filling mouse holes than poly, but it really needs room to expand.

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Old 09-05-2008, 06:34 PM   #8
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Thanks, all, for the advice.

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Old 09-05-2008, 06:49 PM   #9
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same here ,,,all the work to fix it then blew it up
Destruction due to abuse = COOL!
Destruction due to Neglect = SUCK!


Ya...Normally I like blowing **** up!
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Old 09-05-2008, 07:05 PM   #10
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+1 on Great Stuff
I used it for a project last year in my Heat Transfer lab, sweeet stuff.

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