Insulation for stainless steel mash tun

[frontiercdk]

I have a recirculating, direct fire mash tun. I would like to insulate it. I have some of the silver "bubble wrap stuff" from lowes. I am afraid of using it with the burner. Has anyone found a better suited insulation?

 

[Auger]

I asked about this the other day, here:

https://www.homebrewtalk.com/showthread.php?t=570915

Ultimately I've stopped using direct fire for the time being (I also have a direct-fired HLT), and added a bunch of insulation to the MT to help retain heat during the mash. It's been working well so far.

Based on the research I've done, rock/mineral wool would also work with a sheet metal shroud if you want to continue to direct-fire.

 

[frontiercdk]

I purchased a carbon fiber welding blanket. I know it will withstand the heat, but I am not sure If it will insulate well enough. I ordered the 6x6 size from:
http://store.cyberweld.com/panfelwelbla.html

I will post results later.

 

[acidrain]

Rockwool (really in-expensive) covered with a SS wrap (not so inexpensive) has worked well for me.