dense insulation
| Group of material | Brand name |
| Fireclay | REFCOMP A40 |
| REFCOMP A45 | |
| Andalusite | REFCOMP S60 |
| Zircon Mullite | REFCOMP ZM-10 |
| REFCOMP ZM-20 |
| Group of material | Brand name |
| Fireclay | REFCOMP A40 |
| REFCOMP A45 | |
| Andalusite | REFCOMP S60 |
| Zircon Mullite | REFCOMP ZM-10 |
| REFCOMP ZM-20 |