Xonotlite composite insulation boards engineered for aluminum smelters and other high-temperature industries. Made from siliceous and calcareous materials through high-temperature hydrothermal synthesis, our boards feature high compressive strength, low shrinkage, and excellent thermal stability up to 1050°C.
Made from pure siliceous and calcareous materials. No asbestos, non-toxic and harmless to human health.
Long durability under continuous high-temperature loads. Does not powder over time, insulation properties unchanged after water immersion and drying.
Excellent dimensional stability and compressive strength — significantly higher than ordinary calcium silicate boards and similar-density insulation materials.
Tested by the National Refractory Materials Quality Supervision Center. Fire rating A1, fire resistance limit over 3 hours.
Low thermal conductivity with highly porous xonotlite structure, delivering excellent thermal insulation performance.
Can be cut and shaped with ordinary woodworking tools. Easy on-site processing, convenient construction and installation.
| Property | Unit | Type 300 | Type 400 |
|---|---|---|---|
| Bulk Density | kg/m³ | 300 ±10% | 400 ±10% |
| Compressive Strength | MPa | ≥ 2.4 | ≥ 4.2 |
| Flexural Strength | MPa | ≥ 1.0 | ≥ 1.8 |
| Thermal Conductivity | W/m·K | ≤ 0.085 (400°C) | ≤ 0.10 (800°C) |
| Residual Compressive Strength | MPa | — | ≥ 3.5 (900°C, 8h) |
| Linear Shrinkage | % | ≤ 1.2 (1000°C, 3h) | ≤ 1.4 (1000°C, 3h) |
This high-strength xonotlite insulation board is specifically designed for:
Contact our engineering team for product specifications, pricing and technical support.
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