



Calcium Silicate Insulation Board is a high-performance, lightweight thermal insulation material designed to provide exceptional fire resistance and superior thermal insulation in high-temperature industrial applications. This non-asbestos product, primarily made from a blend of silica (SiO₂) and calcium (CaO) along with reinforcing fibers, is widely used across multiple industries for its remarkable heat-resistant properties. It is ideal for applications that require continuous exposure to temperatures as high as 1000ºC.
This product offers not only excellent insulation but also superior mechanical strength and durability, making it suitable for a wide range of applications, including steel furnaces, chemical processing units, boilers, kilns, and energy systems. Available in various thicknesses and dimensions, calcium silicate insulation boards provide an efficient solution for meeting the challenging demands of high-temperature environments.
Calcium Silicate Insulation Board is a high-performance, lightweight thermal insulation material designed to provide exceptional fire resistance and superior thermal insulation in high-temperature industrial applications. This non-asbestos product, primarily made from a blend of silica (SiO₂) and calcium (CaO) along with reinforcing fibers, is widely used across multiple industries for its remarkable heat-resistant properties. It is ideal for applications that require continuous exposure to temperatures as high as 1000ºC.
This product offers not only excellent insulation but also superior mechanical strength and durability, making it suitable for a wide range of applications, including steel furnaces, chemical processing units, boilers, kilns, and energy systems. Available in various thicknesses and dimensions, calcium silicate insulation boards provide an efficient solution for meeting the challenging demands of high-temperature environments.

Thickness Range: 20–115mm
Maximum Temperature Use: Up to 1000ºC
Dimensions Available: 1250x1250mm, 1000x1000mm, 1220x900mm (custom sizes available)
Bulk Density: 230±10% kg/m³ (varies with the type)
Compressive Strength: 0.75–0.95 MPa
Modulus of Rupture: 0.45–0.55 MPa
Thermal Conductivity Coefficient:
At 100ºC: 0.065 W/(m·K)
At 200ºC: 0.075 W/(m·K)
At 400ºC: 0.091 W/(m·K)
At 600ºC: 0.132 W/(m·K)
Permanent Linear Change at 1000°C for 16 hours: ≤ 2.0%
With various densities and thermal conductivity options, our calcium silicate insulation board is adaptable to meet your specific insulation needs across industries and applications.
1. Superior Thermal Insulation
The calcium silicate board is designed to provide outstanding thermal insulation properties. Its low thermal conductivity allows it to effectively minimize heat loss and optimize energy consumption. Whether you need to maintain a consistent temperature within high-temperature reactors or kilns, this board ensures that the energy is efficiently utilized, reducing heating costs over time.
The board's thermal insulation properties are particularly beneficial in industries like steel manufacturing, ceramics, petrochemicals, and glass production, where precise thermal control is essential for production efficiency.
2. High-Temperature Resistance
With a maximum continuous operating temperature of up to 1000ºC, calcium silicate insulation board is perfect for use in industries where high heat is a constant concern. Its excellent resistance to heat ensures that equipment and surrounding environments remain protected from excessive temperature fluctuations and thermal degradation. The material is engineered to retain its mechanical properties and dimensional stability even at elevated temperatures, making it a long-lasting choice for high-temperature applications.
3. Fireproof and Non-Toxic
As an asbestos-free insulation solution, calcium silicate board is safe for both human health and the environment. Its inherent fireproof properties help protect your infrastructure from heat damage, improving the overall safety of industrial installations. Its non-toxic nature ensures that there are no harmful emissions when exposed to high temperatures, further enhancing its suitability for environments requiring stringent safety standards.
4. Lightweight and Easy to Install
The lightweight nature of calcium silicate insulation board makes it easy to handle and install. Despite its strong and durable performance under high temperature and pressure, the material's reduced weight makes it easier and more cost-effective to transport and apply, reducing labor costs and installation time.
This makes it a preferred choice for industrial facilities and construction applications that require large-scale insulation solutions, such as boiler linings, furnace linings, and chemical processing units.
5. Strong Mechanical Properties
In addition to thermal insulation, calcium silicate insulation board is known for its superior mechanical strength, which ensures the board remains intact under compression and physical stress. Its compressive strength (0.75-0.95 MPa) and modulus of rupture (0.45-0.55 MPa) provide solid structural integrity, making it resistant to mechanical impact or wear during regular operation.
6. Resistance to Chemical Erosion
Calcium silicate board has an excellent resistance to various chemical substances, making it suitable for environments where chemical reactions or exposure to aggressive substances occur. Whether used in chemical reactors, petrochemical units, or high-temperature furnaces, its ability to withstand chemical erosion ensures long-term durability and performance.
1. High-Temperature Furnaces and Kilns
Calcium silicate insulation board is widely used in steel furnaces, electric arc furnaces, cement kilns, boilers, and ceramic kilns. Its low thermal conductivity and high-temperature resistance help maintain optimal temperature levels inside the furnace, ensuring efficient heat management. The material is also used as a backup insulation layer behind dense refractory linings, which helps extend the lifespan of the furnace and reduce maintenance costs.
2. Industrial Heat Treatment
For industries that rely on heat treatment processes, such as metal processing, forging, and annealing, calcium silicate insulation boards are used to line heat treatment furnaces. The boards provide the required thermal insulation and allow for better temperature control within the furnace, ensuring that the metal parts undergo the desired thermal treatment without overheating or excessive heat loss.
3. Building Fire Protection
In addition to its industrial applications, calcium silicate board is also used in building fire protection. The boards are installed in fireproof walls, fire doors, and partition walls to prevent the spread of fire. Their excellent fire resistance makes them a safe and effective choice for maintaining structural integrity in the event of a fire. Calcium silicate insulation board is commonly used in high-rise buildings, commercial buildings, and industrial facilities to ensure safety during emergencies.
4. Pipe Insulation
Calcium silicate board is often used as insulation for high-temperature pipes in industrial settings. The insulation properties of calcium silicate help maintain the heat within the pipes and reduce energy consumption. It also protects the pipes from external temperature fluctuations, minimizing the risk of damage due to thermal shock.
5. Chemical Plants and Petrochemical Industries
In petrochemical plants, chemical reactors, and gasifiers, calcium silicate insulation boards are used to insulate high-temperature equipment, providing thermal protection and reducing energy losses. The material’s resistance to chemical corrosion also makes it an ideal choice for these highly demanding environments, where exposure to corrosive chemicals is common.

At Highland Refractory, we pride ourselves on delivering the highest quality calcium silicate insulation boards tailored to your specific requirements. Here’s why you should choose our products:
Superior Performance: Our calcium silicate boards are manufactured with precision, offering excellent thermal insulation, fire resistance, and durability in high-temperature environments.
Custom Sizes: We offer customized sizes, ensuring that our products meet the specific needs of your industrial setup. Whether you need large panels or smaller sections, we can accommodate your requirements.
Competitive Pricing: We provide cost-effective insulation solutions without compromising on quality, ensuring that you get the best value for your investment.
Quick Delivery: With large stocks available, we guarantee prompt delivery to keep your projects on track.
Expert Support: Our team of experts is always available to guide you in selecting the right product for your needs. We provide technical consultations and solutions to help optimize your insulation systems.
Calcium Silicate Insulation Board is a versatile, durable, and cost-effective solution for high-temperature insulation. Whether you are looking to improve energy efficiency, enhance fire safety, or extend the lifespan of your industrial equipment, calcium silicate board offers the performance you need. At Highland Refractory, we provide high-quality products and expert advice to help you meet your industrial insulation needs.
For more information or to request a free sample, contact us today, and let us help you find the best insulation solutions for your business!
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