Dual Wall Sleeve – Semi-Conductive Heat Shrink with Red Insulating Core | Safe Cable Connect

Dual Wall Sleeve with Semi-Conductive Outer Layer & Red Insulating Inner Layer for MV Cable Systems

Safe Cable Connect supplies premium Dual Wall Sleeves designed for medium voltage cable insulation and electrical stress control applications.

This advanced dual wall heat shrink sleeve features:

• Black semi-conductive outer layer for electrical field grading

• Red insulating inner layer for primary MV cable insulation

When heated, the dual wall sleeve shrinks uniformly, restoring insulation integrity while providing controlled surface conductivity — essential for reliable cable joints and terminations.

​

Key Features

✔ Dual wall sleeve construction (semi-conductive outer + red insulation inner)
✔ Excellent electrical stress control
✔ High dielectric strength inner layer
✔ Uniform shrinking without cracking
✔ Smooth conductive outer surface
✔ Moisture, UV & chemical resistant
✔ Long service life in harsh environments
✔ Compatible with MV heat shrink joint kits

 

Product Description

The Dual Wall Sleeve (Semi-Conductive Heat Shrink Type) is manufactured using cross-linked red insulating polyolefin combined with a precision-formulated black semi-conductive outer layer.

During installation, the red inner layer provides high voltage insulation, while the outer semi-conductive wall ensures even electrical field distribution across joints and terminations.

This dual wall sleeve is widely used in:

• Heat shrink cable joint kits

• Heat shrink termination kits

• MV cable repair systems

• Electrical stress control tubing assemblies

Its dual wall design eliminates air gaps, restores cable jacket integrity, and significantly improves operational safety.

 

Applications

• Medium voltage power cables

• Cable joint insulation

• Termination stress control

• Substation cabling

• Underground power networks

• Industrial power distribution

• Utility & EPC infrastructure projects

 

Technical Specifications

• Outer Layer: Semi-conductive polymer

• Inner Layer: Red insulating polyolefin

• Type: Dual wall heat shrink sleeve

• Color: Black outer / Red inner

• Shrink Ratio: 2:1 / 3:1 (as required)

• Operating Temperature: –55°C to +125°C

• Minimum Shrink Temperature: 120°C

• Dielectric Strength (inner): High

• Volume Resistivity (outer): Controlled conductive

(Custom diameters & lengths available)

 

Why Choose Safe Cable Connect Dual Wall Sleeves?

✅ Specialized MV dual wall sleeve manufacturing
✅ Stable electrical performance
✅ Precision extrusion quality
✅ Project-ready bulk supply
✅ Competitive Indian pricing
✅ Technical support available

Safe Cable Connect is a trusted supplier of dual wall sleeves, semi-conductive heat shrink tubing, red insulating sleeves, and MV cable accessories for infrastructure projects across India.