Cellpack 127125 Heat Shrink Tubing, 3:1, Black, 12 mm, 8 m, Adhesive-Free

Electricians and maintenance technicians often need a reliable way to insulate and protect cable splices in control cabinets or industrial machinery. This black heat shrink tubing from Cellpack offers a 3:1 shrink ratio, allowing it to conform tightly over connectors and irregular shapes. The 12 mm initial diameter shrinks to 4 mm when heated, providing a secure, professional finish without the use of adhesive.

Key specifications

• Material: Cross-linked polyolefin
• Shrink ratio: 3:1
• Initial internal diameter: 12 mm
• Shrunk internal diameter: 4 mm
• Length: 8 m
• Colour: Black
• Adhesive lined: No
• Minimum shrink temperature: 70 °C
• Operating temperature range: -55 °C to +125 °C
• Dielectric strength: >15 kV/mm
• Flammability rating: UL VW-1
• Voltage rating: 600 V
• Halogen-free: Yes
• UV resistance: Good
• Chemical resistance: Good

Why choose it

The 3:1 shrink ratio means this tubing can cover a wide range of diameters, reducing the number of sizes you need to stock. Its cross-linked polyolefin construction provides excellent electrical insulation and mechanical protection, while the wide operating temperature range makes it suitable for both indoor and outdoor applications.

Ideal use cases

• Insulating electrical connections and splices
• Bundling cables for neat, organized wiring harnesses
• Providing strain relief at connector terminations
• Protecting cables from abrasion and environmental damage

Good to know

The tubing is halogen-free and flame retardant to UL VW-1, making it a safer choice for enclosed spaces. It is not adhesive-lined, so it can be easily removed if rework is needed.