CUMILAG 25 insulation exhibit unique combination of chemical, mechanical stability and insulating properties. They are suitable for applications at service temperatures ranging from 1250 C to 1850 C. They can be directly exposed to flame, and combustion products.


Physical PropertiesUNITLimit ValueTypical Value
Maximum Hot Face Temperature°C13501350
Bulk Densitygm/cc0.85 max.0.8
Cold Crushing StrengthKg/cm220 min.25
Reheat Change (For 24 hrs.)%-0.5 max. at 1300°C-0.2 at 1130°C
Thermal Conductivity   
At 400°C Hot Face Temp.W/m K0.27 max.0.19
At 600°C Hot Face Temp.W/m K0.30 max.0.22
At 800°C Hot Face Temp.W/m K0.36 max.0.3
At 1000°C Hot Face Temp.W/m K0.43 max.0.35
At 1200°C Hot Face Temp.W/m K
Chemical Analysis   
Al2O3%50.0 min.51.72
Fe2O3%1.0 max.0.8
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