Cold Shrink Tubes
Cold Shrink Tubes are high-performance, pre-expanded silicone rubber sleeves designed to deliver superior environmental sealing and mechanical protection for coaxial cables, power cables, fiber optic connections, and RF antennas.
These cold-shrink tubing solutions are pre-stretched over a removable plastic core. During installation, Simply pull out the core, and the tube immediately contracts, creating a watertight, airtight, and corrosion-resistant seal over cables and connectors.
- Product Introduction
Silicone Rubber Cold Shrink Tube
Premium sealing technology for 5G fiber optic networks and telecommunications infrastructure
Cold shrink tubes are primarily manufactured from two elastomeric materials: silicone rubber and Ethylene Propylene Diene Monomer (EPDM). The fundamental operating principle relies on a pre-expanded technology. During production, the tube is factory-expanded and mounted onto a removable plastic or rigid core.
During field installation, after positioning the tube over the cable connection, the core is simply pulled away. The tube then shrinks radially onto the substrate automatically due to its elastic memory, forming a tight, conformal seal without requiring any heat sources, torches, or professional tools .
Material Technology Comparison
Silicone Rubber Tubes
Optimal for extreme temperature environments and superior electrical performance
- Operating range: -60°C to 200°C
- Dielectric strength: 18-24 kV/mm
- Excellent ozone and corona resistance
- Superior tracking resistance
- UV stability with proper compounding
- Flexibility maintained at low temperatures
Ideal for: Base station electronics, power distribution, industrial applications
Industry application scenarios and solutions
Installation Process
Preparation
Clean cable surface thoroughly and ensure compatibility with tube size. Verify environmental conditions meet installation requirements.
Positioning
Slide pre-expanded tube over connection point. Align precisely with marked positions for optimal sealing performance.
Activation
Remove support core systematically. Tube shrinks radially to form permanent, conformal seal within seconds.
Technical Performance Parameters
| Test Item | Standard / Method | Result |
|---|---|---|
| Breakdown Voltage / Dielectric Strength | GB/T 1408.1-2016 | 32.73kV / 14.86kV/mm |
| IP Rating | GB/T 4208-2017 (IPX8) | No water ingress; no surface change |
| Tear Strength | GB/T 529-2008 | ≥ 35kN/m |
| Tensile Strength / Elongation | GB/T 528-2009 | ≥ 9.5MPa / ≥ 850% elongation |
| UV Aging Resistance | GB/T 16422.3-2014 | No cracks, deformation, or color change |
| Ozone Resistance | GB/T 7762-2014 | No surface cracks |
| Temperature Resistance | -60°C to +200°C | No damage |
| Impact and Cold Brittleness | GB/T 1682-2014 | No cracking after shock |
| Storage Life | Shelf life ≥ 12 months under 40°C | Stable |
Service and Support
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