Lightweight Insulating Castable is a low-density refractory material designed for high-temperature thermal insulation. It offers excellent heat resistance, low thermal conductivity, and easy installation, making it ideal for furnace linings and backup insulation layers.
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Lightweight Insulating Castable is a specially formulated refractory castable combining lightweight aggregates with high-performance binders to deliver superior thermal insulation under high-temperature conditions. With its low bulk density and low thermal conductivity, it effectively reduces heat loss and improves energy efficiency in industrial furnaces and thermal equipment.
This insulating castable features good workability, easy casting, and fast installation, allowing complex shapes and seamless linings to be formed on-site. It maintains stable performance at elevated temperatures while minimizing structural load, making it an ideal choice for backup linings and insulation layers in various high-temperature applications.
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Item |
Specification |
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LW0.6 |
LW0.8 |
LW1.0 |
LW1.1 |
LW1.3 |
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Bulk Density,g/cm3 110℃×24h |
0.6~0.7 |
0.8~0.9 |
1.0~1.1 |
1.1~1.2 |
1.3~1.4 |
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MOR, MPa |
110℃×24h |
≥0.5 |
≥1.0 |
≥1.5 |
≥2 |
≥2.5 |
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1100℃×3h |
≥0.5 |
≥1.0 |
≥1.0 |
≥2 |
≥2.5 |
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Crushing Strength, MPa |
110℃×24h |
≥2.0 |
≥2.5 |
≥5 |
≥6.5 |
≥7.5 |
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1100℃×3h |
≥1.5 |
≥2.0 |
≥3 |
≥5.5 |
≥10 |
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Thermal Conductivity, W/(m·K) 350℃±25℃ |
≤0.2 |
≤0.25 |
≤0.28 |
≤0.35 |
≤0.4 |
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Max Working Temperature, ℃ |
1000 |
1100 |
1150 |
1200 |
1250 |
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Industrial furnaces and kilns
Backup insulation layers for refractory linings
Boilers and incinerators
Heat treatment furnaces
Petrochemical and metallurgical equipment
Cement, steel, and non-ferrous metal industries
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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