Hi . I am looking for fireproof liquid or plastic and air impermeable for use as insulation. Does anyone have information?

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Thomas Cuff

Hello Bamdad Aghababaei ,

Have you considered Teflon or Kapton? Another possibiltiy is waterglass, an aqueous solution of sodium silicate. If the waterglass is applied to a surface and allowed to dry, it should be able to take high temperatures as well as be relatively impermable to air.

Regards,

Tom Cuff