Density 250 kg/m³ · Insulation Series
The lightest grade in our range — a non-asbestos calcium silicate insulation board engineered to cut heat loss and save energy in furnaces, kilns and high-temperature equipment.
Material
A rigid, lightweight insulation board based on xonotlite calcium silicate. It combines very low density with low thermal conductivity, making it ideal for back-up insulation and energy-saving linings.
vs Ceramic Fiber: a hard, dimensionally stable board with no loose fibres or shot — cleaner to handle and machine than fiber blanket.
vs 300 kg/m³: lighter and more insulating; choose 300 when you need a little more strength and a higher 1100°C rating.
Technical Data
| Density | Grade / Use | Max Service Temp | Compressive Strength | Flexural Strength | Thermal Cond. (800°C / 1472°F) |
|---|---|---|---|---|---|
| 250 kg/m³15.6 lb/ft³ | Ultra Insulation | 1050°C1922°F | ≥ 1.0 MPa≥ 145 psi | ≥ 0.55 MPa≥ 80 psi | ≤ 0.165 W/m·K≤ 1.14 BTU·in/hr·ft²·°F |
*Thermal conductivity ≤ 0.062 W/m·K (≤ 0.43 BTU·in/hr·ft²·°F) is at low mean temperature; ≤ 0.165 W/m·K (≤ 1.14 BTU) at 800°C. Non-asbestos, A1 non-combustible. Density tolerance ±10%.
Chemical Composition
| Component | Unit | Value |
|---|---|---|
| SiO₂ | % | 52 Min |
| CaO | % | 40 Min |
| Al₂O₃ | % | 0.3 Max |
| Fe₂O₃ | % | 1.0 Max |
| Loss on Ignition | % | 7 Max |
Available Sizes
Standard sizes (mm, ±2mm): 1210×1210 · 1220×1220 · 1230×1000 · 1230×500 · 1260×600 · 1080×950 · 1000×500.
Thickness: 20–100 mm (0.8–3.9 in). Because of its lower density, the 250 kg/m³ grade starts at 20 mm. Custom sizes and CNC-machined shapes available on request.
Applications
Selection
Quick comparison of the insulation-series grades to help you choose.
| Density | Positioning | Max Service Temp | Compressive Strength | Best For |
|---|---|---|---|---|
| 25015.6 lb/ft³ | Energy Saving | 1050°C1922°F | ≥ 1.0 MPa145 psi | Lightest insulation, back-up linings, energy saving |
| 30018.7 lb/ft³ | General Furnace | 1100°C2012°F | ≥ 2.0 MPa290 psi | General industrial furnace insulation |
| 65040.6 lb/ft³ | Higher Strength | 1000°C1832°F | ≥ 5.0 MPa725 psi | Where more rigidity & load resistance is needed |
Factory & Export
Factory-direct supply with stable stock and professional export packaging — film-wrapped, edge-protected and palletized/crated for safe international shipping.
FAQ
Tell us your dimensions, thickness and quantity — we reply with a factory-direct price within 24 hours.
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