COLD FACE INSULATION BRICKS (CFI)
Group 16 backup insulation for behind the working lining, to 900°C
PRODUCT OVERVIEW
Cold face insulation bricks (CFI) are highly porous, low-density insulating bricks designed to sit behind a dense working lining rather than in the flame path. Their job is purely thermal: cut heat loss through the shell, lower cold-face temperature, and reduce the heat stored in the lining so the furnace heats and cools faster. Classified to Group 16 (approximately 850–900°C service), they are the economical backup layer in most industrial furnace and boiler wall builds.
KEY PROPERTIES
Classification
Group 16 (850–900°C service)
Apparent Porosity
65 – 67%
Bulk Density
0.85 g/cc (0.9 g/cc max spec)
Cold Crushing Strength
1.4 – 1.5 MPa (8 kg/cm² min spec)
Thermal Conductivity
0.20 W/mK at 350°C
Hot Face Use
No — backup/cold face only, not for direct flame
APPLICATIONS
TECHNICAL SPECIFICATIONS
Swipe table to see all columns
| Grade | Porosity | Bulk Density | CCS | Thermal Cond. | plc | Max Temp |
|---|---|---|---|---|---|---|
| CFI Group 16 | 65% | 0.85 g/cc | 1.5 MPa | 0.20 W/mK @350°C | -0.09% @850°C/24h | 850-900°C |
| CFI Group 16 (sample 2) | 67% | 0.85 g/cc | 1.4 MPa | — | — | 850-900°C |
* Typical catalog values. Not independently certified, request a technical datasheet to confirm figures for your application.
AVAILABLE GRADES
INSTALLATION NOTES
- 1
Never place in the flame path — CFI is a backup brick and will not survive direct hot-face duty
- 2
Lay with insulating mortar, not dense fireclay mortar, or the joint becomes a heat bridge
- 3
Handle carefully: at ~1.5 MPa these are far weaker than dense brick and chip easily
- 4
Keep the working lining continuous — any gap lets hot gas reach the CFI layer directly
WHY BUY FROM SHANKER AGENCIES
CFI bricks are where most of the energy saving in a furnace wall actually comes from, and they are also the layer most often under-specified. Shanker Agencies supplies CFI Group 16 with batch test certificates covering CCS, bulk density, apparent porosity, thermal conductivity and permanent linear change, so the numbers you specify are the numbers you can verify on delivery.
PARTNER BRANDS
QUICK INFORMATION
Max Temperature
900°C
Category
Shaped Refractories
Grades Available
1 Standard Grades
Industries Served
Brands We Supply
• Perfect Insulations
📦 Quick Delivery
Standard grades in stock, Delhi warehouse. Pan-India delivery in 2–5 days. Same-day dispatch for urgent orders ≤ 2 MT.
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READY TO ORDER OR NEED A SAMPLE?
Our engineers can recommend the exact grade for your application. Sample kits available for trials. No minimum order on standard grades.
Available Grades, Cold Face Insulation Bricks (CFI)
Select a grade to see its full specification, designations and equivalents.
Need help selecting a grade? Send us your application, operating temperature, dimensions and specification requirements, and our technical team will review the requirement.
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