Dielectric Low Moisture High Silica Sleeve | Silica Content >98%
High-Temperature Dielectric Silica Sleeve for Electrical & Fire-Resistant Protection
Dielectric Low Moisture High Silica Sleeve (>98% SiO₂) is a specialized high-temperature protective sleeving engineered for applications requiring excellent electrical insulation, minimal moisture absorption, and reliable thermal performance under extreme conditions.
Manufactured from ultra-high-purity silica fibers and processed with a low-moisture dielectric finish, this sleeve maintains stable dielectric strength even in humid, high-voltage, and fire-exposed environments.
Designed for continuous operating temperatures up to 1000°C and short-term exposure up to 1200°C, dielectric high silica sleeve is widely used in power generation, electrical insulation systems, fire-resistant cable protection, aerospace, and industrial heating equipment.
Key Performance Advantages
- Silica Content: >98% (Ultra-High Purity SiO₂)
- Excellent Dielectric Strength & Electrical Insulation
- Low Moisture Absorption – reduced leakage current
- Continuous Temperature Resistance: Up to 1000°C
- Short-Term Heat Exposure: Up to 1200°C
- Low Thermal Conductivity
- Non-Combustible, Non-Asbestos & Halogen-Free
The low-moisture dielectric formulation ensures consistent electrical insulation performance, even in humid, vibration-prone, or high-temperature environments.
Sleeve Construction & Electrical Engineering Benefits
Dielectric Low Moisture High Silica Sleeve is manufactured from high-purity silica yarns converted through a controlled leaching process to achieve >98% silica content. A specialized dielectric surface treatment:
- Minimizes moisture uptake
- Improves surface insulation resistance
- Enhances dielectric breakdown voltage
- Maintains insulation stability during thermal cycling
Available in knitted or braided tubular constructions, depending on flexibility, abrasion resistance, and installation requirements.
Typical Technical Specifications
| Property | Value |
|---|---|
| Product Type | Dielectric High Silica Sleeve |
| Silica Content | >98% |
| Construction | Knitted / Braided |
| Moisture Absorption | Very Low |
| Dielectric Strength | High |
| Continuous Temperature | Up to 1000°C |
| Short-Term Temperature | Up to 1200°C |
| Inner Diameter Range | 3 mm – 100 mm (custom sizes available) |
| Wall Thickness | 1.0 mm – 3.0 mm |
| Color | White / Off-White |
Industrial Applications
Electrical & Power Industry
- High-voltage cable insulation
- Transformer, generator & motor protection
- Electrical panel fire-resistant sleeving
Fire-Resistant Cable Protection
- Fire-rated wiring and cable sleeves
- Electrical pass-through insulation
- Emergency power system protection
Aerospace & Electronics
- High-temperature electrical insulation
- Fire-resistant avionics protection
- Combined thermal & dielectric shielding
Industrial Heating & Furnaces
- Electrical wiring protection in furnaces
- High-temperature cable shielding
- Thermal and electrical isolation
Optional Enhancements & Treatments
- Silicone coating – enhanced moisture & abrasion resistance
- PTFE or specialty dielectric coatings – improved electrical insulation
- Metal wire reinforcement (SS/Inconel) – added mechanical strength
- Low-dust surface treatment – clean installation in sensitive environments
Standards, Compliance & Quality Assurance
- ASTM D149 – Dielectric Breakdown Voltage
- ASTM E84 – Flame Spread Index
- ASTM C892 – High-Temperature Insulation
- ISO 9001: Quality Management System
- RoHS & REACH Compliant
- Non-Asbestos & Environmentally Safe
Each batch is supplied with TDS, COA, dielectric test reports, and full traceability documentation.
Why Choose Our Dielectric High Silica Sleeve?
- Guaranteed >98% silica purity
- Low-moisture, dielectric-optimized formulation
- Stable electrical & thermal performance
- Multiple constructions & custom sizes available
- Trusted global export supply to USA, Europe, Middle East & Asia
FAQs
Its low moisture absorption and enhanced surface insulation provide reliable dielectric performance in high-voltage environments.
Yes, it is specifically engineered to maintain electrical insulation performance even in humid environments.
Yes, it is non-combustible and widely used in fire-rated electrical protection systems.
Yes, dielectric coatings and metal wire reinforcement options are available.
Product Tags
Dielectric high silica sleeve, low moisture silica sleeve, electrical insulation silica sleeve, high temperature dielectric sleeve, fire resistant cable sleeve, high voltage insulation sleeve