Magnesite Brick — 91%
The same basic brick at approximately 91% MgO. The extra magnesia displaces silicate bonding phase between the grains, which is where the low-melting compounds form — so the gain over the 90% grade is chemical resistance at the grain boundaries, not a higher temperature rating.

| Shape | Rectangle |
|---|---|
| Application | Side Walls, Partition Walls, Roof |
| Resistance Durability | Heat Resistant |
Values as published by the manufacturer. Manufacturer TDS governs.
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