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"Micafil" block fill vermiculite??? - Forno Bravo Forum: The Wood-Fired Oven Community

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Dear forum users,
Thank you for your patience with the Photo galleries. We've got your galleries online!
We have finished writing a custom script to migrate the PhotoPlog to vBulletin5’s albums.

Unfortunately V-Bulletin killed the "Photoplogs" in their software upgrade which was unforeseen and we're the first development group to have written a script for getting the galleries back... that said, it took some time to reverse engineer the code and get the albums to move over seamlessly!

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"Micafil" block fill vermiculite???

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  • "Micafil" block fill vermiculite???

    I went to my local building supply looking for vermiculite to use as loose insulation over the ceramic fiber blanket I had wrapped around my oven... and they sold me "Micafil" brand block fill vermiculite. It says its for filling concrete blocks or walls and is water resistant. OK- but is it appropriate for the insulating job I bought it for?
    I got it home and poked a hole in one of the bags... it's close to the consistency of oatmeal-like flakes... is that what it's supposed to be? I may have had the wrong impression, but I thought it was supposed to be more granular, larger pieces so there would be air pockets...
    Can anyone tell me whether this vermiculite is appropriate as oven insulation?
    Thanks

  • #2
    Re: "Micafil" block fill vermiculite???

    It is fine. Perlite is more granular.

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    • #3
      Re: "Micafil" block fill vermiculite???

      Reassurance is always good...thanks for the reply

      I can't work on it today (too darn cold and the wind's gusting to 60mph), so hopefully tomorrow..

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      • #4
        Re: "Micafil" block fill vermiculite???

        I often get asked the coverage of a 4 cuft bag of perlite/vermiculite in a CMU wall. The answer, of course, is 16 if the wind isn't blowing.

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        • #5
          Re: "Micafil" block fill vermiculite???

          Think that i bought the same stuff, but it is called Zonolite. not sure i can use it to mix with Portland cement and use for my Hearth slab. this stuff is almost powdery looks like pepper almost
          Toby

          Columbus, NE

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          • #6
            Re: "Micafil" block fill vermiculite???

            Originally posted by meco211 View Post
            Think that i bought the same stuff, ...this stuff is almost powdery looks like pepper almost
            Meco211 - not sure what you have, but I don't think it's the same product as mine (although it sounds like it's originally intended for the same purpose)

            As I said in my post - this "Micafil" stuff is almost the consistency of raw rolled oats, not as fine as what you're describing...

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            • #7
              Re: "Micafil" block fill vermiculite???

              Zonolite is perlite and is fine to use, no matter what consistency.

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              • #8
                Re: "Micafil" block fill vermiculite???

                Vermiculite is a form of mica. They actually look quite similar.

                Website: http://keithwiley.com
                WFO Webpage: http://keithwiley.com/brickPizzaOven.shtml
                Thread: http://www.fornobravo.com/forum/f21/...ttle-7878.html

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                • #9
                  Re: "Micafil" block fill vermiculite???

                  thanks for the response
                  Toby

                  Columbus, NE

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                  • #10
                    Re: "Micafil" block fill vermiculite???

                    Originally posted by kebwi View Post
                    Vermiculite is a form of mica. They actually look quite similar.
                    Vermiculite is EXFOLIATED Mica. That is, it goes through a furnace @ 1000c and the mica expands.

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