i Ceramic, Metallurgical
i Carbon black
i Fertiliser
i Iron & Steel
i Power generation


i High temperature kiln hot face & backup lining
i Back up lining
i Primary reformer and hydrogen transfer lines back up,Secondary reformer cold face
i Blast furnace stoves
i High temperature air pre-heaters


CUMILAG 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°C18501850
Bulk Densitygm/cc1.50 max.1.45
Cold Crushing StrengthKg/cm260 min.75
Reheat Change (For 24 hrs.)%-0.3max.at1650°C-0.2at1650°C
Thermal Conductivity
At 400 C Hot Face Temp.1.60 max.1.48
At 600 C Hot Face Temp.W/m K1.55 max.1.43
At 800 C Hot Face Temp.1.30 max.1.22
At 1000 C Hot Face Temp.1.30 max.1.11
At 1200 C Hot Face Temp.1.30 max.1.05
Chemical Analysis
Al2O398.0 min.98.50
SiO21.0 max.0.70
Fe2O30.2 max.0.12
Recommended Laying Mortars


i CUMILAG 23, 25, 26 : Calcined clay and Calcined Alumina based product