Palar Sanat developed ultra-low cement Castables with refractory aggregate, powder, and less than 1.2% alumina cement. These Castables have a high refractory
temperature, high strength, and good slag resistance, due to the low amount of cement
| BRAND | PLC 55 | PLC 60 | PLC 70 | PLC 80 | PLC 90 | PLC 92 | PLC 94 | PLC 97 | PLC 98 | |
| Chemical Composition (%) | AL2O3 | 55 | 60 | 70 | 80 | 90 | 92 | 94 | 97 | 98.5 |
| SiO2 | 38 | 29 | 11 | 11 | 4 | 3 | 3 | 0.1 | 0.1 | |
| Fe2O3 | 2.5 | 1.5 | 2.8 | 1.8 | 1.5 | 1.2 | 1 | 0.1 | 0.1 | |
| CaO | 1.2 | 1.2 | 1.1 | 1.1 | 1 | 0.8 | 0.7 | 0.6 | 0.6 | |
| Bulk density (g/cm3) | 2.3 | 2.5 | 2.6 | 2.7 | 2.8 | 2.8 | 2.9 | 2.95 | 3 | |
| Cold crushing strength (kgf/cm2) | 110°C×5h | 350 | 350 | 400 | 450 | 450 | 480 | 500 | 530 | 550 |
| 1200°C×5h | 650 | 700 | 750 | 800 | 850 | 880 | 850 | 880 | 900 |
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