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Old 02-03-2008, 05:36 PM   #1
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Default Spray on insulation

I have been using my MT with a hot water heater blanket for some time now with good results, but latley I've been loosing a little more heat in an hr than I would like. I recently saw a product by 3M that was a spray on insulation and thought that it might be perfect for insulating a MT. Anyone out there tried this stuff or a comparable spray on insulator?

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Old 02-03-2008, 06:00 PM   #2
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All of the spray-on foams I've used (urethane & latex) burn, so if you have some way of fire-proofing it.

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Old 02-03-2008, 06:12 PM   #3
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Ahh yes, fire, I didn't think of that. I will have a direct fire MT as soon as I get my pump, so I guess that won't work. Unless I cover the outside of the MT with a fire blanket over the spray on insulation.

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Old 02-03-2008, 07:07 PM   #4
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www.mcmaster.com has a bunch of insulating products. One that you might consider is part #9356K13, 2" thick high-temp wrap ($26.95 for a 24"x96" sheet). Wrap your mash tun in that, then wrap the water heater blanket around it, and I bet you get good results.
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Old 02-04-2008, 03:52 AM   #5
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Hey Yuri have you used that product before? I would be interested in trying it out. I have duct insulation on my MT right now wrapped with a hot water insulation on top of that. I roughly loose 2-5 deg in an hour. Not up to my standards!

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Old 02-04-2008, 04:22 AM   #6
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I haven't used that particular product, but McMaster rarely disappoints me (except in price...sometimes rather steep).

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Old 02-04-2008, 02:23 PM   #7
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Thanks for the feedback Yuri. I'm wondering what the chances are of that spray on stuff actually catching fire. Probably not worth trying to rig something up.

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Old 02-04-2008, 02:30 PM   #8
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One of the reasons to have a direct fire MT is so that if you lose a little heat, you can bring the temp back up. I could be wrong, but I don't think many of the DF guys on this board worry that much about insulation.

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Old 02-04-2008, 06:42 PM   #9
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I'm sure there are lots of nasty chemicals that will be given off when heated.

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Old 02-05-2008, 05:23 AM   #10
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That could also be true Orfy! I wouldn't want to drop dead after mashing in. I think a little insulation would be beneficial , so one is not constantly having to keep the burner going to keep a certain temp. I found some spray on insulation today in my new Grainger master catalog. It says it is R-6 and meets fire requirements. I'll have to investigate a little more on this.

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