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Calcium Silicate Insulation Material

Updated: 2026-07-15

Overview

Calcium silicate insulation material is a synthetic, inorganic product composed primarily of calcium oxide and silica. It is manufactured through a hydrothermal reaction, resulting in a lightweight, microporous structure that provides excellent thermal insulation. As a non-asbestos material, it meets modern safety standards and is widely used in high-temperature industrial applications. Its versatility and durability make it a preferred choice for insulating pipes, boilers, and equipment in power plants, refineries, and chemical processing facilities. The material is also used in construction for fireproofing and thermal barriers.

Physical and Chemical Properties

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Calcium silicate insulation exhibits low thermal conductivity (typically 0.05-0.07 W/m·K at 100°C), ensuring efficient heat retention. Its high melting point (around 1540°C) and non-combustible nature make it suitable for extreme temperatures. The material is chemically stable, resistant to most acids and alkalis, and does not degrade under prolonged exposure to heat. With a density ranging from 170-250 kg/m³, it offers a balance between lightweight handling and structural strength. The microporous structure also provides sound insulation properties, adding to its multifunctional utility.

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Main Applications

In industrial settings, calcium silicate is extensively used for insulating pipes, boilers, and furnaces where temperatures can exceed 1000°C. Its fireproof qualities make it ideal for lining kilns and ovens. The construction industry employs it for fire-rated walls, ceilings, and HVAC system insulation. Additionally, it serves as a passive fire protection material in ships and offshore platforms. Its ability to withstand harsh environments while maintaining thermal efficiency has cemented its role in energy-intensive industries.

Safety and Storage

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While calcium silicate is non-toxic, cutting or grinding the material can generate dust, requiring PPE such as masks and goggles. It should be stored in a dry environment to prevent moisture absorption, which could compromise its insulating properties. Packaging typically includes moisture-resistant wrapping. Disposal follows standard industrial waste guidelines, as the material is inert and environmentally benign. Proper handling minimizes workplace exposure to airborne particles.

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B2B Procurement Guide

When procuring calcium silicate insulation, prioritize suppliers with ISO or ASTM certifications to ensure quality consistency. Key specifications to verify include thermal conductivity, compressive strength, and maximum service temperature. Bulk orders often attract discounts, but confirm lead times for customized dimensions. For international shipments, inquire about moisture-proof packaging to prevent transit damage. Samples can be tested for compliance with project requirements before large-scale purchases.

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