In building fire emergencies, the continuous operation of critical systems such as fire pumps, smoke extraction fans, emergency lighting, and fire alarm systems is essential for evacuation and rescue efforts. The reliability of these systems depends on the ability of power cables, control cables, and communication cables to maintain circuit integrity and continue transmitting power and signals under fire conditions.
With the implementation of standards such as IEC 60331, BS 6387, GB/T 19216, and GB 31247, fire-resistant cable requirements have evolved beyond flame retardancy. Modern cable systems are increasingly required to maintain circuit operation during fire exposure. As a result, Ceramic Silicon Rubber has become an important material option for the insulation and sheathing of fire-resistant cables.
What Is Ceramic Silicon Rubber?
Ceramic Silicon Rubber is a functional polymer composite material developed for fire-resistant wire and cable applications. It is based on silicone rubber and formulated with ceramic-forming fillers, fluxing agents, and other functional additives.
Under normal conditions, the material retains the flexibility, electrical insulation, weather resistance, ozone resistance, and wide-temperature stability of silicone rubber. It can be processed using conventional rubber extrusion equipment, making it suitable for efficient cable manufacturing and installation.
When exposed to fire or prolonged high temperatures, the material undergoes a ceramification process, gradually forming a ceramic-like protective structure around the conductor. This structure helps maintain insulation separation and supports circuit integrity during fire exposure.
Compared with traditional mica tape-wrapped fire-resistant cable constructions, Ceramic Silicon Rubber can be applied directly through extrusion, helping simplify manufacturing processes and improve production efficiency. In higher fire-resistance designs, it can also be combined with Synthetic Mica Tape and other fire-resistant materials.
Ceramification Mechanism
The fire-resistant performance of Ceramic Silicon Rubber is based on its in-situ ceramification process.
As temperature increases, the silicone rubber matrix undergoes thermal degradation, leaving behind an inorganic residue primarily composed of silicon dioxide (SiO₂). At higher temperatures, ceramic-forming fillers and fluxing components begin to react, creating bridges between inorganic particles and forming a continuous ceramic network through sintering.
The resulting ceramic structure provides mechanical support and electrical isolation between conductors, helping reduce the risk of short circuits and supporting cable operation during fire conditions.
It should be noted that the ceramicized structure is inherently brittle. Therefore, the overall fire performance of a cable depends not only on the material itself, but also on cable design, manufacturing processes, insulation systems, and installation conditions.
Advantages in Fire-Resistant Cables
Ceramic Silicon Rubber offers a balance between fire performance and processability.
The ceramic layer formed at high temperatures helps maintain insulation separation and structural integrity, supporting compliance with circuit integrity requirements. The material is compatible with conventional extrusion processes and does not require additional tape-wrapping operations, helping simplify production and improve manufacturing efficiency.
In addition, Ceramic Silicon Rubber retains the excellent heat-aging resistance, electrical insulation performance, ozone resistance, and UV resistance of silicone rubber, making it suitable for long-term use in demanding environments.
Typical Applications
As demand for fire-resistant cable systems continues to grow, Ceramic Silicon Rubber is being used in a wide range of applications:
Building Fire Protection: Fire-resistant power cables, fire alarm cables, and emergency lighting circuits.
Railway Transit: Power, control, and signaling cables for subways, tunnels, and railway stations.
Petrochemical and Industrial Facilities: Control cables, instrumentation cables, and specialty industrial cables requiring enhanced fire safety.
New Energy Systems: Electric vehicle high-voltage wiring harnesses, energy storage system interconnection cables, and fire-protection isolation structures.
ONE WORLD Fire-Resistant Cable Material Solutions
As a professional cable material manufacturer, ONE WORLD provides a comprehensive range of materials for fire-resistant cable production, including Ceramic Silicon Rubber, Synthetic Mica Tape, Low Smoke Zero Halogen (LSZH) Sheathing Compounds, and Cross-linked Polyethylene (XLPE) Insulation Compounds.
These materials are widely used in fire-resistant power cables, control cables, railway transit cables, new energy cables, and other specialty cable applications. ONE WORLD also provides technical support for material selection, sample evaluation, and production implementation.
Conclusion
By transforming from a flexible rubber material into a ceramic-like protective structure under fire conditions, Ceramic Silicon Rubber offers a practical balance between processing efficiency and fire-resistant performance. It has become an important material option for the insulation and sheathing of fire-resistant cables.
As safety requirements continue to increase across building fire protection, railway transit, power systems, energy storage, and new energy applications, Ceramic Silicon Rubber is expected to play an increasingly important role in the development of high-performance fire-resistant cable materials. ONE WORLD remains committed to providing reliable cable materials and technical support to cable manufacturers worldwide.
Post time: Jun-24-2026