CUMILAG 26 (Insulation Refractories)

CUMILAG 26 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.


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


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

cumilag 26 properties

PROPERTIESUNITLimit ValueTypical Value
Maximum Hot Face Temperature°C14001400
Bulk Densitygm/cc0.90 max.0.86
Cold Crushing StrengthKg/cm215min.18
Reheat Change(For 24 hrs.)%-0.7max.at1350°C-0.2at1350°C
Thermal Conductivity




At 400°CHotFaceTemp.0.28 max.0.17
At 600°CHotFaceTemp.0.30 max.0.23
At 800°CHotFaceTemp.0.42 max.0.31
At 1000°CHotFaceTemp.0.50 max.0.35
At 1200°CHotFaceTemp.0.55 max.0.38
Chemical Analysis




SiO240.0 max.39.15
Fe2O31.0 max.0.80
Recommended Laying Mortars CUMIBONDLKFX