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Home Brew Forums > Home Brewing Beer > DIY Projects > Kettles, Mash Tuns, & Hot Liquor Tanks > Keggle insulation
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Old 02-02-2010, 07:19 PM   #11
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Even the closed cell foam is only rated to 220* F. What if you used fiberglass, such as for duct insulation which is lined with alum. foil on one side - cut it to size, then spray it lightly with high-temp. (1200*) paint to hold the fiberglass in place, then totally wrap this in heavy duty aluminum foil and seal up with aluminum HVAC tape? Wouldn't that be able to handle higher temperatures? I'd think that the paint to stick down the fiberglass, plus totally encasing it in alum foil, would pretty much eliminate the chance of getting any fiberglass in your brew?
If (if) you get wort into the insulation, it is a big mess and has to be removed and thrown away. [ Been there. ]
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Old 02-02-2010, 07:25 PM   #12
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If (if) you get wort into the insulation, it is a big mess and has to be removed and thrown away. [ Been there. ]
Well, that's why I was going to wrap it watertight in alum. foil. Actually, I don't know if I'm going to do this or not - I have some fiberglass duct insulation already - I'm going to get some paint and spray some insulation and see if I think that will hold the fiberglass in place well enough to prevent any possibility of loose fiberglass - if not, maybe I'll have to try the closed cell foam and just hope it doesn't melt.
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Old 02-02-2010, 07:54 PM   #13
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lamarguy, did you get the adhesive backed stuff? If so, how well does the glue hold up?
I got the 1/2" thick non-adhesive version (afraid it would fail over time and leave a sticky mess). I bought a 50' roll of 2" velcro to secure the insulation around the tun. Three sheets insulated the top, bottom, and sides of my three 15 gallon tuns, so one sheet per 15 gallon tun.

It's the same soft foam insulation used to insulate A/C lines. Super easy to work with and an excellent R factor.
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Old 02-03-2010, 04:07 PM   #14
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Ok, I got a sheet of the 1" black close cell foam from a friend of mine. Will 3m spray glue (I have) be enough to hold it on the keg or would a velcro set up like lamarguy discribed be better? The tun heat will not be over 175 degrees.

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Old 02-03-2010, 04:10 PM   #15
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Personally, I'd try gluing something to an old throwaway container with that adhesive and put some 180F water into it to see if the glue gets soft. I'd hate to have a whole keg coated with that crap if it has a temp failure.

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Old 02-03-2010, 05:08 PM   #16
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I like the idea of the closed cell insulate but I have a question for the direct fire Reflectix users.

Do you keep the Reflectix on the MT while your heating the water or do you slip / wrap once doghed in?

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Old 02-03-2010, 05:53 PM   #17
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No, you can't leave reflectix on during heating with flame. Been there, melted that.

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Old 02-03-2010, 07:59 PM   #18
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How does the reflectix secure to the keggle

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Old 02-03-2010, 08:05 PM   #19
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How does the reflectix secure to the keggle
I used 3M spray glue when I attatched it to my MLT and I have not had any issues.
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Old 11-24-2010, 06:33 PM   #20
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So in all of this, has anyone found a material or solution for a insulating material that can be used on your keggle if it is on open flame? or that can be used on your boil Keggle, so something that withstands 250+ degrees

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