JM23 JM26 Insulation Brick is a lightweight insulating fire brick with low thermal conductivity and good thermal insulation performance for high-temperature furnace applications.
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JM23 JM26 Insulation Brick is a lightweight refractory insulation brick designed for use in industrial furnaces and kilns. Manufactured from high-quality refractory materials, it offers low bulk density, low thermal conductivity, and reliable performance at elevated temperatures.
JM23 and JM26 insulation bricks are commonly used as backup lining materials to reduce heat loss, improve energy efficiency, and protect the working lining of high-temperature equipment. Standard sizes and customized dimensions are available to meet different installation requirements.
| Brand | JM23/K23 | JM26/K26 | JM28/K28 | JM30/K30 | JM32/K32 | |
| IFB2300 | IFB2600 | IFB2800 | IFB3000 | IFB3200 | ||
| Classification Temperature (℃) | 1260 | 1430 | 1540 | 1650 | 1760 | |
| Bulk Density (g/cm3) | 0.55-0.62 | 0.78-0.8 | 0.88 | 1.03 | 1.25 | |
| Cold Crushing Strength (Mpa) | 1.2 | 1.6 | 2.1 | 2.5 | 3.5 | |
| Modulus of Rupture (Mpa) | 0.9 | 1.4 | 1.6 | 2.1 | 2.1 | |
| Reheating Linear Change (%) | 1230℃ | 1400℃ | 1510℃ | 1620℃ | 1730℃ | |
| CT-30 ℃X 8H | -0.5 | -0.5 | -0.5 | -0.9 | -0.9 | |
| Thermal Expansion 1000℃（%） | 0.5 | 0.7 | 0.8 | 0.9 | 1.1 | |
| Thermal conductivity（W/m.k） | 400℃ | 0.14 | 0.27 | 0.32 | 0.41 | 0.49 |
| 600℃ | 0.16 | 0.29 | 0.34 | 0.43 | 0.5 | |
| 800℃ | 0.18 | 0.31 | 0.36 | 0.44 | 0.51 | |
| 1000℃ | 0.2 | 0.33 | 0.38 | 0.45 | 0.53 | |
| Al2O3 (%) | 37 | 54 | 64 | 72 | 77 | |
| Fe2O3 (%) | 1 | 0.9 | 0.8 | 0.7 | 0.5 | |
JM23 JM26 Insulation Bricks are widely used in:
Comprehensive Refractory Product Range
We manufacture 3 main types of refractory materials — refractory castables, high alumina cement, and refractory bricks — covering 100+ industrial furnace types worldwide.
Certified Quality and International Standards Compliance
All batches undergo strict quality control. Products comply with ISO, ASTM, and GB standards, ensuring reliable performance in high-temperature industrial applications.
Annual Production Capacity of 130,000 Tons
With a large-scale capacity of 130,000 tons per year, we guarantee stable supply and on-time delivery for long-term and large-volume projects.
Exported to 120+ Countries and 1,000+ Projects
Our products have been successfully delivered to over 120 countries, supporting more than 1,000 industrial projects, including cement, steel, incineration, glass, and petrochemical furnaces.
20+ Years of Experience in Refractory Manufacturing
With over 20 years of experience, we understand real furnace conditions and deliver materials proven in long-term industrial operations worldwide.
Professional Technical Support and Free Samples
We provide technical assistance from material selection to installation guidance, with free samples available for testing and supporting 1,000+ projects globally.
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