HellermannTyton 321-10850 SE28 Heat Shrink Tubing 85mm Black 3.5:1 Non-Adhesive (1m)

With a high 3.5:1 shrink ratio, this 85 mm black heat shrink tubing recovers to 24.3 mm, sealing and protecting large connectors and cable joints. Made from cross-linked polyolefin without adhesive, it is flame-retardant to UL224 VW-1 and operates from -55°C to +135°C.

Overview

The HellermannTyton SE28 series offers reliable insulation and strain relief for demanding electrical applications. This non-adhesive tubing is supplied in a 1-metre length and shrinks at a minimum temperature of +90°C. The recovered wall thickness of 2.8 mm provides robust mechanical protection, while the 60 Shore D hardness ensures durability.

What stands out

• High 3.5:1 shrink ratio for covering irregular shapes
• Wide operating temperature range: -55°C to +135°C
• Self-extinguishing per UL224 VW-1
• Dielectric strength of 20 kV/mm for electrical insulation
• Longitudinal shrinkage limited to ±5% for precise fitting

Technical details

• Supplied diameter: 85 mm
• Recovered diameter: 24.3 mm
• Material: Cross-linked polyolefin
• Colour: Black
• Adhesive lined: No
• Minimum shrink temperature: +90°C
• Recovered wall thickness: 2.8 mm
• Hardness: 60 Shore D
• Packaging unit: 1 metre

Our verdict

An excellent choice for heavy-duty insulation and sealing in industrial environments. The high shrink ratio and flame-retardant properties make it a dependable solution for cable management.