Industrial Furnace Calcium Silicate Insulation Board High Temperature Cal Sil Board
Leadsun Calcium Silicate Board is an asbestos-free thermal insulation material designed for continuous service temperatures from 650°C to 1100°C. It is lightweight, durable, and offers low thermal conductivity and high mechanical strength. Available in 650, 1000, and 1100 grades, it is widely used as backup insulation in steel, petrochemical, ceramic, cement, and glass industries, and for fire protection in construction. It helps improve energy efficiency, production performance, and workplace safety. In building applications, it is also suitable for ceilings, fireproof walls, and decorative sound-absorbing panels.
| Physical index | Unit | L-200 | L-230 | L-250 | L-270 |
|---|---|---|---|---|---|
| Density | kg/m3 | 200±10% | 230±10% | 250±10% | 270±10% |
| Cold Crushing Strength | Mpa | ≥0.60 | ≥0.80 | ≥0.90 | ≥1.00 |
| Flexural Strength | Mpa | ≥0.35 | ≥0.45 | ≥0.50 | ≥0.55 |
| Maximum Service Temp. | ℃ | 1000℃ | 1000℃ | 1000℃ | 1000℃ |
| Linear Shrinkage(1000℃x16hrs) | % | ≤2 | ≤2 | ≤2 | ≤2 |
| Thermal Conductive | w/(m.k) | 200℃ 0.075 400℃ 0.098 600℃ 0.150 800℃ 0.210 |
200℃ 0.085 400℃ 0.100 600℃ 0.152 800℃ 0.214 |
200℃ 0.095 400℃ 0.108 600℃ 0.156 800℃ 0.216 |
200℃ 0.098 400℃ 0.110 600℃ 0.158 800℃ 0.218 |
| Compression Strength at 10% Deformation after 16hrs*1000℃ | Mpa | 0.32 | 0.40 | 0.45 | 0.50 |
| Porosity | % | 90.80 | 90.60 | 90.40 | 90.00 |
| Moisture Content | % | 3-5% | |||
| PH Value | % | 8-9% | |||
| Color | / | white | |||
| Surface Condition | / | 1.Original dimple pattern. 2.Double sanded, smooth and good flatness. |
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High temperature resistance up to 1100°C
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Asbestos-free and environmentally safe
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Low thermal conductivity for excellent insulation
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High mechanical strength with good flexural and compressive performance
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Lightweight and easy to handle for fast installation
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Moisture resistant, stable in wet conditions
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Excellent dimensional stability under thermal cycling
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Suitable for both industrial and construction applications
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Furnace backup insulation (reheating, annealing, rotary kilns)
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Steel & metallurgy (ladles, tundishes, hot metal cars)
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Petrochemical (heaters, reformers, pipe supports)
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Ceramic & cement (tunnel kilns, nozzles, flow gates)
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Building construction (fireproof ceilings, wall insulation)
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Power & HVAC (boilers, duct lining)
- Thickness: 25mm, 50mm, 75mm, 100mm (custom thickness available)
- Dimensions: 1200mm × 600mm, 1200mm × 1200mm, or as customized
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