Heat-Shrink Tubing Cabletech 5 mm × 1 m, black (LEC-NAR0248.1)

Cabletech heat-shrink tubing, 5 mm diameter and 1 m length in black, is a flexible thermoplastic sleeve designed to provide electrical insulation, mechanical protection and environmental sealing for wires, cable joints and small assemblies after heat application. The tubing contracts when heated to form a tight, conformal layer around conductors and components, reducing exposure to moisture, abrasion and minor mechanical stress while improving cable appearance and organization.

Advantages

This heat-shrink tubing offers reliable insulation and a compact fit for repairs and cable harnessing where a 5 mm internal diameter is appropriate. Its black color provides discreet protection and uniform appearance in visible installations. The 1 m length allows multiple cuts for several repair points or for creating custom-length sleeves for DIY electrical tasks and small electronics maintenance. The material's ability to form a close seal after heat application helps protect against dust and light moisture ingress and provides modest strain relief.

Suitable for

• Insulating soldered joints and wire splices
• Protecting individual wires in cable harnesses
• Repairing insulation on small power or signal cables
• Organizing and bundling small groups of wires
• Providing a neat finish on hobby and DIY electronics projects

Key specifications

• Material: heat-shrinkable thermoplastic
• Recovered inner diameter (approximate after shrink): suitable for wires and bundles around 5 mm nominal before heating
• Nominal expanded diameter: 5 mm
• Length: 1 meter
• Color: black
• Function: electrical insulation, mechanical protection and environmental sealing after heat application

How to use

Cut the tubing to the required length, slide it over the wire or joint to be insulated, then apply heat evenly using a heat gun, lighter or soldering iron with appropriate distance and motion to avoid overheating. Heat until the tubing visibly contracts and conforms tightly to the underlying surface. Allow the tubing to cool and set before handling. For best results, ensure cables and joints are clean and dry prior to shrinking.

Usage recommendations

Use a controlled heat source such as a hot-air gun for even shrinking and to avoid scorching nearby components. For electrical joints, position the tubing so it fully covers the splice with at least a few millimetres overlap on each side. Do not use on live circuits without proper insulation and safety measures; disconnect power before applying heat-shrink tubing.