3M TE100048681 Heat Shrink Tubing, Black, 3:1, 36 mm Expanded, 1 m Length

Electricians and maintenance technicians use this 3M heat shrink tubing to insulate and protect cable splices, terminations, and repairs in industrial and automotive environments. The black polyolefin sleeve shrinks to a third of its expanded diameter when heated, forming a tight, durable seal around irregular shapes.

Key specifications

• Expanded diameter: 36 mm
• Recovered diameter: 12 mm
• Shrink ratio: 3:1
• Length: 1 m
• Material: Polyolefin
• Colour: Black
• Operating temperature range: -55 °C to +135 °C
• Minimum shrink temperature: 110 °C
• Dielectric strength: 20 kV/mm
• Voltage rating: 600 V
• Flammability rating: UL VW-1 (self-extinguishing)
• Recovered wall thickness: 0.8 mm
• UV resistance: Good

Why choose it

The 3:1 shrink ratio allows the tubing to slide over large connectors and then recover tightly onto cables with smaller diameters, providing excellent strain relief and environmental sealing. The polyolefin material offers good resistance to abrasion and chemicals, while the black colour is standard for electrical insulation.

Ideal use cases

• Insulating and protecting wire splices and terminations
• Bundling and organising cable harnesses
• Providing strain relief for connectors and breakout points
• Sealing against moisture and contaminants in harsh environments

Good to know

This tubing is suitable for applications requiring a balance of flexibility, durability, and electrical insulation. It meets UL and CSA standards and is RoHS compliant.