China’s calcium silicate board industry has really become a key player when it comes to fireproof and insulating materials. Their products are widely used in power plants, steel mills, commercial buildings, and industrial machinery. You often find these boards tucked behind boiler walls or under metal cladding systems. Honestly, these little details matter way more than those shiny marketing claims you see everywhere.
According to Grand View Research, construction and industrial insulation are the biggest drivers for demand in the global calcium silicate market. Their recent analysis shows steady growth over the coming years, which is pretty encouraging. MarketsandMarkets agrees—sort of—though they come up with slightly different market values. That’s mainly because some reports look at calcium silicate products as a whole, while others break it down into boards, pipes, or insulation systems. So, when it comes to ranking manufacturers, you can't just go by export numbers; there’s more to it.
Professor Michael F. Ashby, a well-known expert on materials selection, once said, “The best material is the one that hits all the design needs at the lowest possible cost.” That really hits the nail on the head when choosing calcium silicate boards, too. Buyers should pay attention to factors like density, thermal conductivity, flexural strength, operating temperature, how they handle moisture, testing standards, and whether production is consistent. Looking at certificates alone? Not enough. It’s wise to also check factory audits, sample testing, and references from previous projects—these give you a clearer picture.
This guide takes a look at China’s top ten calcium silicate board manufacturers based on those practical criteria. We consider how well their products perform, their manufacturing experience, international support, quality documentation, and application know-how. Of course, it’s not a perfect ranking—the numbers can be skewed by regional pricing differences, capacity changes, and gaps in publicly available info. But overall, it’s a solid starting point for engineers, distributors, contractors, and industrial buyers trying to find reliable suppliers they can trust.
What Is Calcium Silicate Board and Where Is It Used?
Calcium silicate board is a rigid, mineral-based panel made from silica, lime, reinforcing fibers, and water. During autoclaving, these materials form a stable calcium silicate hydrate structure. The board is non-combustible, dimensionally stable, and resistant to moisture-related decay. It is not the same as ordinary gypsum board.
Its uses are practical and varied. Contractors install it around steel columns, furnace walls, boiler rooms, ducts, ceilings, and partition systems. It also appears in ship interiors and industrial insulation assemblies. According to the International Energy Agency’s 2024 buildings report, buildings consume about 32% of global energy. Better fire protection and thermal control can therefore support safer, more efficient buildings. The Global Market Insights calcium silicate market report estimates steady market growth through 2032, driven by construction and industrial insulation demand.
On site, cutting should be controlled because fine dust can irritate the lungs. Boards need firm framing, suitable fasteners, and sealed joints. A frequent mistake is treating every calcium silicate board as waterproof. Some products tolerate humidity, but prolonged water exposure can weaken edges. Fire ratings also depend on the complete tested assembly, not the board alone. That detail is often overlooked. Product density, thickness, thermal conductivity, and compliance with standards such as ASTM C533 should be checked before specification. Manufacturers matter, but verified test data matters more.
China Top 10 Calcium Silicate Board Manufacturers? - What Is Calcium Silicate Board and Where Is It Used?
| No. | Product Category | Typical Density | Common Thickness | Typical Maximum Service Temperature | Main Performance Characteristics | Typical Applications | Relevant Testing or Reference Standards |
|---|---|---|---|---|---|---|---|
| 1 | High-density fire-resistant board | 700–1,000 kg/m³ | 6–25 mm | Approximately 600–1,000°C, depending on formulation | Non-combustible mineral core, good dimensional stability and fire resistance | Fire-rated walls, ceilings, shafts, doors and equipment enclosures | EN 13501-1, ASTM E136, ASTM C533 where applicable |
| 2 | Standard construction calcium silicate board | 650–900 kg/m³ | 4–20 mm | Approximately 500–800°C | Rigid, machinable, moisture-resistant and suitable for surface finishing | Interior partitions, ceilings, linings and dry construction systems | EN 14306, EN 13501-1 and project-specific building codes |
| 3 | Low-density thermal insulation board | 170–250 kg/m³ | 25–100 mm | Approximately 650–1,000°C | Low thermal conductivity, lightweight structure and non-combustibility | Industrial furnaces, kilns, heat-treatment equipment and thermal barriers | ASTM C533, EN 14306 and thermal-conductivity testing at specified temperatures |
| 4 | High-temperature refractory calcium silicate board | 220–350 kg/m³ | 25–100 mm | Approximately 1,000–1,100°C | High-temperature stability, low heat storage and easy cutting | Furnace backup insulation, kiln cars, heat shields and boiler areas | ASTM C533 and manufacturer-tested temperature classification |
| 5 | Pipe and vessel insulation board | 200–300 kg/m³ | 25–75 mm | Approximately 650–1,000°C | Low thermal conductivity, compressive strength and resistance to heat aging | Steam pipes, hot-water lines, ducts, tanks and process vessels | ASTM C533, EN 14306 and project insulation specifications |
| 6 | Water-resistant exterior-grade board | 750–1,000 kg/m³ | 6–15 mm | Approximately 300–600°C in building applications | Reduced water absorption, weather resistance and stable substrate performance | Exterior cladding substrates, ventilated façades and soffits | EN 12467, EN 13501-1 and regional façade testing requirements |
| 7 | Acoustic and fire-rated partition board | 800–1,100 kg/m³ | 8–20 mm | Approximately 500–800°C | High surface hardness, fire resistance and contribution to sound insulation systems | Hotels, offices, schools, hospitals and residential partitions | EN 13501-1, ISO 10140 and ASTM E90 for tested assemblies |
| 8 | Tunnel and transportation fire-protection board | 700–950 kg/m³ | 10–30 mm | Approximately 600–1,000°C | Fire protection, vibration tolerance and resistance to smoke or toxic combustion gases | Road tunnels, rail tunnels, subway systems and service corridors | EN 13501-1, EN 1363-1 and project-specific tunnel fire tests |
| 9 | Industrial equipment lining board | 250–600 kg/m³ | 20–80 mm | Approximately 650–1,100°C | Thermal insulation, low heat accumulation and compatibility with high-temperature linings | Ovens, dryers, heat exchangers, boilers and process equipment | ASTM C533, thermal conductivity and compressive-strength tests |
| 10 | Decorative and finish-ready calcium silicate panel | 800–1,200 kg/m³ | 4–12 mm | Approximately 300–600°C | Smooth surface, paintability, dimensional stability and non-combustible mineral composition | Wall panels, ceiling finishes, retail interiors and commercial fit-outs | EN 13501-1, surface-finish specifications and project fire-test requirements |
Calcium Silicate Insulation Boards: A Practical Guide to Heat Protection and Industrial Efficiency
Calcium silicate insulation boards provide a practical solution for heat protection in industrial equipment, furnaces, kilns, ducts, and high-temperature pipe systems. Available in STD, HTC, and EHD models, these pure white boards offer a maximum service temperature of 1000–1100°C. Their thermal conductivity ranges from 0.064 to 0.113 W/m·K, helping reduce heat loss, improve temperature control, and support more efficient energy use during continuous operation.
The boards combine low weight with dependable mechanical performance. Bulk density ranges from 230 to 950 kg/m³, while the modulus of rupture is 0.45–6.5 MPa, allowing selection according to insulation thickness, handling requirements, and installation conditions. With an A1 combustion performance rating, they are suitable for applications where non-combustibility and stable heat protection are important. Their principal composition includes 48–52% SiO₂ and 35–40% CaO, with Al₂O₃ at 0.4–0.5% and Fe₂O₃ at 0.3–0.4%.
For convenient installation, regular sizes include 1000×500×50 mm, 1200×600×50 mm, and 900×600×50 mm. The boards can be incorporated into multilayer insulation systems or used as rigid thermal barriers, helping protect surrounding structures and maintain consistent process temperatures. Their HS code is 680610100, supporting standardized classification for industrial trade and logistics.
FAQS
: Evaluate production records, curing stability, test reports, factory controls, and delivery performance. Factory size alone proves little. Request recent samples and shipment evidence before making a decision.
Check density, bending strength, moisture resistance, fire performance, thermal conductivity, and dimensional stability. Measure thickness and edge quality on received samples. Small differences can affect installation.
Yes. Samples should represent ordinary production batches, not specially prepared pieces. Ask for batch numbers, production dates, and laboratory details. Old reports may no longer reflect current quality.
Inspect curing equipment, raw-material storage, quality checkpoints, and finished-board handling. Look for chipped corners, uneven edges, damp packaging, and inconsistent color. These details are easy to miss.
Boards may vary in thickness, density, surface texture, edge shape, and dimensions. Some products include grooved, perforated, or decorative surfaces. Confirm every option with physical samples.
No. Water resistance usually does not prove permanent immersion suitability. Confirm absorption data and the intended humidity conditions. Application details matter.
Define thickness, density, tolerances, cut sizes, holes, packaging, and surface requirements. A small cutting change can affect fire or structural performance. Approve drawings and samples before mass production.
Give each supplier the same technical brief and request identical quotation details. Compare specifications, packaging, minimum order quantity, lead time, and replacement terms. Different promises create confusing results.
Not always. Lower prices may hide sorting work, installation waste, damaged boards, or late delivery. Higher prices also do not guarantee better quality. I once judged value too narrowly.
A trial order reveals delivered condition, cutting behavior, packaging strength, and actual delivery time. It also tests communication after problems appear. No evaluation is perfect.
Conclusion
This guide explores how China’s top Calcium Silicate Board manufacturers serve the needs of construction, industrial insulation, fire protection, ceilings, partitions, and other building applications. It explains the material’s main properties, including fire resistance, dimensional stability, moisture tolerance, thermal insulation, and ease of processing. The article also presents a practical framework for evaluating manufacturers through production capacity, raw material control, testing procedures, technical expertise, delivery reliability, and customer support.
Readers will learn about common manufacturing standards, quality certifications, product categories, thickness options, density ranges, surface treatments, and customized solutions. A comparison of leading manufacturers focuses on technical features, application suitability, customization capabilities, pricing considerations, and long-term service rather than brand promotion. The final section provides useful guidance for comparing quotations, verifying documentation, assessing sample quality, clarifying production requirements, and selecting a dependable supplier for specific project conditions.
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