In fire safety-critical cable manufacturing, maintaining circuit integrity during extreme heat, flame, water spray, and mechanical shock is non-negotiable. Fire Resistant Cable Mica Tape (commonly known as Mica Cable Tape or Mica Tape) is a specialized high-temperature electrical and thermal insulation material engineered to deliver unmatched fire protection, dielectric strength, and mechanical reinforcement.
This advanced tape consists of high-quality mica paper (phlogopite or calcined muscovite) bonded to supporting substrates such as non-alkaline glass fabric or polyethylene film and impregnated with high-temperature resistant silicone resin. It forms a robust, flexible barrier that prevents conductor melting, insulation breakdown, and short-circuiting, enabling cables to continue operating for 90–180 minutes or more under fire conditions.
As a trusted B2B supplier of complete cable materials and technical solutions with decades of experience in global fire-resistant cable projects, we recognize Mica Tape as the essential layer that allows manufacturers to meet the strictest international standards for emergency power, control, and safety systems in buildings, subways, nuclear plants, ships, and industrial facilities.
Two Main Types of Mica Cable Tape: Phlogopite vs. Calcined
Type A: Phlogopite Mica Tape Produced from premium phlogopite mica paper bonded to glass fabric or PE film with silicone resin. Phlogopite offers excellent flexibility, acid/alkali resistance, and reliable fire performance at flame temperatures of 750–850°C. It is the most widely used and cost-effective choice for standard fire-resistant power supply lines, control cables, emergency lighting, and building wiring where moderate-to-high fire resistance is required.
Type B: Calcined Mica Tape Manufactured from high-purity calcined muscovite mica paper reinforced with alkali-free glass fiber cloth and silicone resin. Calcined mica provides superior thermal stability and the highest level of fire resistance (900–950°C+), with lower smoke emission and zero halogen content. It is the preferred solution for extreme environments such as ship cables, nuclear power cables, offshore platforms, and high-rise buildings requiring the most stringent circuit integrity.
Key Technical Advantages & Performance Benefits
Unmatched Fire Resistance & Circuit Integrity Mica Tape maintains dielectric strength and prevents conductor exposure even at 750–1000°C, enabling cables to pass IEC 60331 (fire at 750–950°C) and BS 6387 CWZ (fire + water spray + mechanical shock) tests for 90–180 minutes.
High Dielectric Strength & Electrical Insulation Excellent insulation properties (typically >5–8 kV/mm breakdown voltage) ensure reliable isolation between conductors and layers under normal and emergency conditions.
Superior Flexibility & Processability High tensile strength combined with excellent elongation allows smooth longitudinal or helical wrapping on high-speed cable lines without cracking or delamination.
Low Smoke & Halogen-Free Performance Especially in calcined grades, the tape produces minimal smoke and no corrosive halogen gases, supporting safe evacuation and reducing secondary fire damage.
Thermal & Environmental Stability
- Short-term resistance: Up to 1000°C+
- Long-term operating temperature: 90–180°C (depending on grade)
- Outstanding resistance to moisture, chemicals, corona, and radiation
Lightweight & Cost-Effective Thin profile (0.08–0.15 mm) adds minimal weight while delivering maximum protection, making it ideal for both standard and specialty fire-resistant cable designs.
Primary Applications in Fire-Resistant Cable Systems
Mica Cable Tape is applied as the primary fire-resistant insulation layer directly over conductors or between insulation and sheath in:
- Fire-resistant power cables (emergency power supply)
- Control and instrumentation cables
- Emergency lighting and evacuation systems
- Shipboard, offshore, and marine cables
- Nuclear power plant cables
- High-rise buildings, subways, tunnels, and data centers
It is typically used in combination with XLPE or silicone rubber insulation and low-smoke zero-halogen (LSZH) sheaths to achieve full compliance with fire safety regulations.
Technical Specifications
Single-Side Glass Fiber Cloth Backed Mica Tape
| Parameter | Phlogopite Mica Tape | Calcined Mica Tape | Test Condition / Standard |
|---|
| Mica Content | ≥55% | ≥60% | High fire resistance |
| Substrate | Glass fabric / PE film | Alkali-free glass fiber cloth | High mechanical strength |
| Impregnation | Silicone resin | Silicone resin | Thermal stability |
| Thickness | 0.08–0.15 mm | 0.08–0.15 mm | Precision slitting |
| Width | 6–1000 mm | 6–1000 mm | Custom available |
| Fire Resistance | IEC 60331, BS 6387 | IEC 60331, BS 6387 | Circuit integrity |
| Temperature Resistance | Excellent | Superior | Long-term stability |
(Custom thicknesses, widths, and mica content available to match exact fire-resistance class and cable design.)
Custom thicknesses, widths, mica content, single/double-side, and glass/PE backing options are available to match exact fire-resistance class (e.g., BS 6387 CWZ) and cable design.
Fire Resistance Standards & Compliance
Mica Cable Tape meets the most stringent global requirements:
- IEC 60331 – Circuit integrity under fire conditions (750–950°C)
- BS 6387 – Fire resistance (C = fire alone, W = fire + water spray, Z = fire + mechanical shock)
- GB/T 19666 – Fire-resistant cables (China)
- Additional: DIN 4102, NFC 32-070, VDE 0472-814
Cables wrapped with properly selected Mica Tape routinely achieve 90–180 minutes of circuit integrity.
Packaging & Logistics
Available in coil or roll form:
- Coil: Width 6–1000 mm, length 500–1000 m, inner diameter 52 mm or 76 mm, outer diameter 250–450 mm.
- Roll: Width 6–15 mm, length up to 30,000 m, various tube core sizes.
Secure wooden case or pallet packaging ensures safe transportation and storage worldwide.
Essential Fire Protection Layer for Life-Saving Cable Performance
Fire Resistant Cable Mica Tape (Phlogopite or Calcined) provides the critical thermal and electrical barrier that keeps power and control circuits operational during fire emergencies. Its proven fire resistance, dielectric strength, flexibility, and compliance with IEC 60331 and BS 6387 make it indispensable for manufacturers producing safety-critical cables for buildings, infrastructure, marine, and nuclear applications.
For cable manufacturers and EPC contractors prioritizing reliable quality, customized technical solutions, and long-term safety performance, Mica Tape ensures your cables meet the highest fire-resistance standards while maintaining efficient production and competitive costs.
Inquiry Now to request detailed technical data sheets, samples, custom specifications (including phlogopite, calcined, single/double-side, or reinforced grades), or competitive bulk quotations tailored to your fire-resistant cable designs and production lines. Our expert team provides full technical consultation and one-stop material solutions that strengthen your competitive advantage in global fire-safety cable markets.
Fire Resistant Cable Mica Tape – Reliable Cable
Fire Resistant Cable Mica Tape (Phlogopite & Calcined) provides critical fire protection, electrical insulation and mechanical integrity for MV/HV power cables and emergency systems. Excellent thermal stability and circuit integrity under fire conditions.
Product SKU: Mica Cable Tape1
Product Brand: RLB Machinery
Product Currency: USD
Product Price: Contact for Quote
Product In-Stock: InStock
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