Silicone heat shrink tubing (silicone rubber heat shrinkable tube) is made from modified silicone rubber, offering both the inherent properties of silicone tubing and heat shrinkable performance. It combines excellent high-temperature resistance, high voltage resistance, softness, elasticity, and good puncture resistance.

 

When heated, the tubing quickly shrinks to half its original diameter, tightly wrapping around and protecting electronic components from external environmental influences. Compared to standard heat shrink tubing, silicone heat shrink tubing’s greatest advantage is its **high-temperature rating up to 200℃**.

 

**Key Features**

| Feature | Description |

| **Excellent High Temperature Resistance** | Continuous operating temperature range -50℃ to +200℃ (premium products: -75℃ to +200℃) |

| **Soft & Elastic** | Silicone material is soft and flexible; Shore A hardness approx. 60±5 |

| **Superior Electrical Insulation** | Volume resistivity ≥2×10¹³ Ω·cm; voltage rating up to 2.5KV-10KV |

| **High Voltage Resistance** | Withstands 1000V-10000V, suitable for various voltage environments |

| **Chemical Resistance** | Resists oil, chemicals, arc, and corona |

| **High Shrink Ratio** | Radial shrinkage ≥50%; 2:1 shrink ratio |

| **Flame Retardant** | VW-1 flame rating available |

| **Environmentally Friendly** | RoHS compliant; free from hazardous substances |

 

**Specifications**

| Parameter | Typical Value |

| Shrink Ratio | 2:1 (1.7:1 available) |

| Shrink Temperature | ≥90℃~100℃ |

| Continuous Operating Temp | -50℃ to +200℃ (premium: -75℃ to +200℃) |

| Specific Gravity (25℃) | 1.1 |

| Hardness (Shore A) | 60±5 |

| Tensile Strength | ≥6.5 MPa |

| Elongation at Break | ≥350% |

| Tear Strength | ≥30 KN/m |

| Volume Resistivity | ≥2×10¹³ Ω·cm |

| Dielectric Strength | ≥25 kV/mm |

| Flame Rating | VW-1 (optional) |

| Standard Colors | Grey, White, Black, Red, Blue, Green, Transparent |

 

**Size Specifications**

| Size (mm) | Supplied ID (mm) | Recovered ID (mm) | Recovered Wall (mm) | Standard Packaging |

| Φ1.5 | ≥1.5 | ≤0.9 | ≥0.6 | 50m/pack |

| Φ2.0 | ≥2.0 | ≤1.2 | ≥0.8 | 50m/pack |

| Φ3.0 | ≥3.0 | ≤1.8 | ≥0.8 | 50m/pack |

| Φ4.0 | ≥4.0 | ≤2.5 | ≥1.0 | 50m/pack |

| Φ5.0 | ≥5.0 | ≤3.0 | ≥1.0 | 50m/pack |

| Φ6.0 | ≥6.0 | ≤3.6 | ≥1.0 | 50m/pack |

| Φ8.0 | ≥8.0 | ≤5.0 | ≥1.0 | 20m/pack |

| Φ10 | ≥10 | ≤6.0 | ≥1.5 | 20m/pack |

| Φ12 | ≥12 | ≤7.2 | ≥1.5 | 20m/pack |

| Φ15 | ≥15 | ≤9.0 | ≥1.5 | 20m/pack |

| Φ17 | ≥17 | ≤10.5 | ≥1.5 | 20m/pack |

| Φ20 | ≥20 | ≤12.5 | ≥1.5 | 10×1m/pack |

| Φ25 | ≥25 | ≤15.0 | ≥2.0 | 10×1m/pack |

| Φ30 | ≥30 | ≤18.5 | ≥2.0 | 10×1m/pack |

| Φ40 | ≥40 | ≤24.0 | ≥2.0 | 10×1m/pack |

*Custom sizes and packaging available upon request*

 

**Voltage Rating vs. Wall Thickness**

| Voltage Rating | Wall Thickness |

| 2500V | ≥0.50mm |

| 4000V | ≥1.00mm |

| 7000V | ≥2.00mm |

| 10000V | ≥2.50mm |

 

*Applicable for ID 0.5mm-20mm; custom thickness available*

 

**Applications (Non-Medical)**

| Application Field | Specific Uses |

| **Aerospace** | Aircraft wire harness protection, high-temperature insulation |

| **Automotive** | Engine compartment wiring, sensor protection, high-temp/oil-resistant environments |

| **Electronics & Electrical** | Electronic component insulation, solder joint protection, high-temperature component protection |

| **New Energy** | EV wire harness, energy storage systems, charging station insulation |

| **Petrochemical** | Corrosion-resistant pipe protection, probe covering, chemical media environments |

| **Home Appliances** | Internal wiring protection for water heaters, ovens, microwaves |

| **Lighting** | LED lighting, specialty lamp internal insulation |

| **Instrumentation** | Precision instrument wire management, sensor protection |

| **Transformers** | Transformer coil insulation, high-temperature protection |

| **Motors & Electrical** | Motor lead insulation, rotor covering protection |

 

> The above applications focus on industrial and commercial uses. Medical applications are excluded.

 

**Comparison with Other Heat Shrink Tubing**

 

| Comparison | Silicone Tubing | PTFE Tubing | Standard PE Tubing |

| Max Operating Temp | 200℃ | 260℃ | 125℃ |

| Flexibility | Excellent | Stiff | Moderate |

| Shrink Temperature | 100℃ | 330℃ | 120℃ |

| Chemical Resistance | Good | Excellent | Limited |

| Elastic Recovery | Excellent | Fair | Fair |

| Flame Rating | VW-1 optional | VW-1 | VW-1 |

| Cost | Moderate | High | Low |

 

> **Selection Guide**:

> – Choose **Silicone Heat Shrink Tubing** for applications requiring softness, elasticity, and 200℃ temperature resistance

> – Choose **PTFE Heat Shrink Tubing** for higher temperature (>200℃) requirements

> – Choose **PE Heat Shrink Tubing** for standard insulation applications (most economical)

 

**Key Features Summary**

– **Soft & Flexible**: Ideal for covering irregular shapes and uneven surfaces

– **High Temperature Resistance**: Continuous operation from -50℃ to +200℃

– **High Shrink Ratio**: 2:1 shrink ratio; tight fit after heating

– **Excellent Insulation**: High volume resistivity; withstands up to 10KV

– **Weather Resistance**: Ozone, UV, and chemical resistant

– **Environmentally Friendly**: RoHS compliant; non-toxic

Continuous operation from -50℃ to +200℃