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High-Temperature Insulating Silicone Fiberglass Sleeve from China Suppliers - Factory Direct Cable Wire Cover
Product Features & Core Advantages
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◎ Excellent High-Temperature Resistance
Benefiting from the stability of the fiberglass substrate, the products offer a wide operating temperature range. For instance, silicone rubber fiberglass sleeve can be used continuously from -65°C to 260°C while maintaining flexibility. Silicone resin fiberglass sleeve has a continuous operating temperature of up to 200°C, with short-term tolerance of 260°C. PVC fiberglass sleeve withstands temperatures up to 105°C. Some fiber casings are suitable for continuous high-temperature operation at 538°C.
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◎ Superior Electrical Insulation
The products possess strong insulating capabilities, suitable for high-voltage environments. For example, silicone resin fiberglass sleeve has voltage withstand ratings from 1200V to 7000V, with some products rated at 1.5KV, 4KV, or higher. The room temperature breakdown voltage for PVC fiberglass sleeve is 2000V. Their dielectric properties, voltage endurance, arc resistance, and corona resistance are excellent, making them ideal electrical insulation materials.
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◎ Reliable Flame Retardancy & Fire Safety
Most products feature good self-extinguishing properties, quenching rapidly upon removal from a flame source, and comply with flame retardant standards like VW-1. Products like silicone rubber fiberglass sleeve are also known as fire-resisting sleeves and serve as safe, eco-friendly alternatives to hazardous materials like asbestos.
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◎ Good Mechanical & Chemical Protection
The braided structure provides good flexibility and bend adaptability, facilitating wiring in complex spaces. Additionally, the products offer tear resistance, abrasion resistance, and provide a degree of water, oil, ozone, and chemical stability, protecting internal cables from mechanical damage and chemical corrosion.
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◎ Diverse Specifications & Certifications
The product diameter range is extensive, commonly from Φ0.8mm to Φ40mm, with special models up to Φ35.0mm or larger to meet different wire gauge needs. A variety of colors are available, such as white, black, red, blue, etc. Products typically comply with environmental and safety certifications like SGS and ROHS.
Product Specifications & Parameters
◎ Base Material: High-purity alkali-free braided fiberglass tube.
◎ Coating Material: PVC resin, silicone resin, silicone rubber, etc.
◎ Standard Colors: White, black, red, blue, white with green stripe, white with red stripe, white with blue stripe, etc. (depending on type).
◎ Diameter Range: Φ0.8mm ~ Φ40mm (common), special sizes can be made by customization.
◎ Continuous Operating Temperature:
◎ PVC Fiberglass Sleeve: ~105°C
◎ Silicone Resin Fiberglass Sleeve: ~200°C
◎ Silicone Rubber Fiberglass Sleeve: -65°C ~ +260°C
◎ General Fiber Sleeve: -60°C ~ +200°C (some models withstand higher temperatures)
◎ Voltage Withstanding Rating: Varies from 1.2KV to 7KV depending on product type and specification.
◎ Flame Retardant Standard: Complies with standards such as VW-1.
◎ Certifications: ROHS, SGS, compliant with relevant national or industry standards (e.g., Type 2715-Ⅲ).
Primary Application Fields
Motor & Electrical Appliance Insulation
Widely used for wire insulation and end winding protection in various motor, generator, and transformer windings (e.g., Class H, Class N).
Home Appliances & Electronics
Used for internal wiring bundling, insulation, and heat resistance in electric heating equipment, televisions, air conditioners, microwave ovens, etc.
Industrial Equipment & Instruments
Suitable for cable protection in high-temperature environments like electric furnaces, ovens, and induction heating equipment in metallurgy, chemical, and mining industries.
Special Lighting & Electric Heating Products
Used for external insulation and protection of high-temperature lamps (e.g., halogen, metal halide), heating tubes, and heating elements.
Automotive & Rail Transit
Engine compartment wiring harnesses, battery pack connections, and other areas requiring high-temperature and flame-retardant protection.
Aerospace & Military Equipment
Insulation protection for electrical systems with extremely high requirements for weight, temperature resistance, and reliability.
Characteristics
| Item | Silicone Fiberglass Sleeve |
| Temperature Endurance (℃) | -10℃ ~ +200℃ |
| Temperature Endurance | 200℃ ±2℃, 168h ≥ 1/2 |
| Aging Test | 260℃, 6h, No Cracking |
| Cold Bend | No Cracking |
| Off-self Time (S) | 10S |
| Horizontal Flame Test | ≤ 30S |
| Flammability | VW-1 |
| Volume Resistivity (Ω.cm) | 10¹¹ |
| Submerge Water Test | Not sticky, not deformed, not softened |
| Type | Testing Condition | Average Voltage (V) | Individual Value (V) |
| FLT-15 | UL1441 | 1200 | 800 |
| FLT-15 | UL1441 | 1500 | 1000 |
| FLT-25 | UL1441 | 2500 | 1800 |
| FLT-40 | UL1441 | 4000 | 3000 |
| FLT-70 | UL1441 | 7000 | 5000 |
Installation & Usage Guide
1
Selection Guide
Choose the appropriate coating type and size based on the maximum operating temperature, required insulation level (voltage rating), harness diameter, and flame retardancy requirements of the actual application environment.
2
Installation Method
Slide the sleeving directly over the wire or harness to be protected. It can be cut to specific lengths as needed. Its flexibility allows easy bending to follow wiring paths.
3
Precautions
• Although heat resistant, avoid prolonged direct contact with open flames or extreme heat sources exceeding the product's rated temperature.
• For applications requiring embedding in walls or concrete, note that wire replacement during maintenance might be more difficult compared to rigid conduit, and concrete curing may cause slight deformation of the sleeve.
• Store in a cool, dry place away from prolonged direct sunlight to slow material aging.
• For applications requiring embedding in walls or concrete, note that wire replacement during maintenance might be more difficult compared to rigid conduit, and concrete curing may cause slight deformation of the sleeve.
• Store in a cool, dry place away from prolonged direct sunlight to slow material aging.
Product Specifications
| Size | (mm) Inside Diameter | Min. Wall Thickness (T) (mm) | (M/Tray) Packing Length (Meter/Roll) | |||
| 1200/1500V | 2500V | 4000V | 7000V | |||
| Φ0.5 | 0.5+0.20/-0 | 0.20 | 0.20 | 0.28 | 0.35 | 100 |
| Φ1.0 | 1.0+0.20/-0 | 0.20 | 0.20 | 0.28 | 0.35 | 100 |
| Φ1.5 | 1.5+0.20/-0 | 0.20 | 0.20 | 0.28 | 0.35 | 100 |
| Φ2.0 | 2.0+0.20/-0 | 0.22 | 0.22 | 0.30 | 0.38 | 100 |
| Φ2.5 | 2.5+0.20/-0 | 0.22 | 0.22 | 0.30 | 0.38 | 100 |
| Φ3.0 | 3.0+0.25/-0 | 0.23 | 0.23 | 0.35 | 0.45 | 100 |
| Φ3.5 | 3.5+0.23/-0 | 0.23 | 0.23 | 0.35 | 0.45 | 100 |
| Φ4.0 | 4.0+0.25/-0 | 0.25 | 0.25 | 0.38 | 0.45 | 100 |
| Φ4.5 | 4.5+0.25/-0 | 0.28 | 0.30 | 0.40 | 0.48 | 100 |
| Φ5.0 | 5.0+0.35/-0 | 0.33 | 0.33 | 0.43 | 0.50 | 100 |
| Φ6.0 | 6.0+0.35/-0 | 0.35 | 0.36 | 0.45 | 0.52 | 100 |
| Φ7.0 | 7.0+0.50/-0 | 0.36 | 0.40 | 0.46 | 0.54 | 100 |
| Φ8.0 | 8.0+0.50/-0 | 0.38 | 0.43 | 0.49 | 0.56 | 50 |
| Φ9.0 | 9.0+0.50/-0 | 0.40 | 0.44 | 0.50 | 0.58 | 50 |
| Φ10.0 | 10+0.70/-0 | 0.43 | 0.46 | 0.53 | 0.62 | 50 |
| Φ12.0 | 12+0.70/-0 | 0.43 | 0.46 | 0.53 | 0.62 | 50 |
Note
1. Standard color is White, other colors and special sizes can be made as per customization.
Make a Free Consultation
Frequently Asked Questions (FAQ)
What is the maximum operating temperature of silicone rubber fiberglass sleeve?
Silicone rubber fiberglass sleeve can be used continuously across a wide temperature range of -65°C to +260°C while maintaining excellent flexibility. This makes it one of the most versatile options for high-temperature electrical insulation applications.
What voltage ratings are available for fiberglass insulation sleeves?
Fiberglass sleeves are available in a range of voltage ratings to suit different applications. Silicone resin fiberglass sleeves offer ratings from 1200V up to 7000V, with specific types such as FLT-15 (1200V/1500V), FLT-25 (2500V), FLT-40 (4000V), and FLT-70 (7000V) tested under UL1441 standards.
What diameter sizes are available, and can custom sizes be ordered?
The standard diameter range covers Φ0.5mm to Φ12.0mm and beyond, with common sizes up to Φ40mm. Custom sizes and special dimensions can be manufactured upon request to meet specific application requirements. Standard packing length is 100 meters per roll for smaller sizes and 50 meters per roll for larger diameters.
Are fiberglass sleeves flame retardant and do they meet safety certifications?
Yes. Most fiberglass sleeve products feature self-extinguishing properties and comply with the VW-1 flame retardant standard. Products are also certified to ROHS and SGS environmental and safety standards, and comply with relevant national or industry standards such as Type 2715-Ⅲ.
What colors are available for fiberglass insulation sleeves?
Standard color is White. Other available colors include black, red, blue, white with green stripe, white with red stripe, and white with blue stripe, depending on the product type. Custom colors and special sizes can also be produced upon request.
How should fiberglass sleeves be stored and maintained?
Fiberglass sleeves should be stored in a cool, dry environment away from prolonged direct sunlight to prevent material aging. Avoid contact with open flames or heat sources that exceed the product's rated operating temperature. For optimal performance, keep the sleeves in their original packaging until use.