Something similar was suggested here: https://powdertoy.co.uk/Discussions/Thread/View.html?Thread=243&PageNum=84#Message=21457

Properties:

1. Doesn't burn

2. Melts at high temperature (>4000*C)

3. Doesn't conduct heat

4. Doesn't conduct electricity

5. Doesn't break at hight pressure

5. Doesn't block air pressure

Could be used as building material and insulator in locations with open fire, such as engines, reactors, ovens etc., where INSL cannot be used, cause it is flamable.

@greymatter (View Post)

 What do you mean? It will take at least 3 pixels TTAN-TTAN-INSL, other way INSL will burn

@minecraft-physics (View Post)

 +1 to http://tpt.io/.258972

That's what i mean/