Heat-shrink tubing Cabletech 4.5 mm × 1 m, black (LEC-NAR0247.1)

Cabletech heat-shrink tubing, 4.5 mm diameter and 1 m length in black, is a single-wall sleeve designed to insulate and protect electrical connections and wire joints. It provides mechanical protection, strain relief and environmental separation for splices, terminations and harnesses in electronics, automotive and household installations. The product shrinks radially when heated to form a snug, protective layer over cables and connectors.

Advantages

The single-wall construction offers reliable electrical insulation and basic mechanical protection while remaining flexible for routing and bundling wires. Black color allows discreet application and straightforward color-coding when combined with other tubing colors. Its 4.5 mm diameter before shrinking accommodates a range of conductor sizes and small cable assemblies, and the 1 m length suits multiple repair and maintenance tasks without excess waste.

Suitable for

• Repairing damaged cable insulation and restoring continuity of electrical wires
• Providing strain relief and protection for soldered joints and crimped terminals
• Bundling and routing wires in small harnesses and electronic assemblies
• Sealing and color-coding cable runs in automotive and household applications

Key specifications

• Material: single-wall heat-shrinkable polyolefin (general-purpose electrical grade)
• Nominal inner diameter before shrinking: 4.5 mm
• Length: 1 meter
• Color: black
• Shrink ratio: typically 2:1 (suitable for common general-purpose tubing)
• Typical operating temperature range: suitable for standard electrical and automotive environments (refer to manufacturer for exact limits)

How to use

Cut the required length of tubing, slide it over the cable or joint so it fully covers the exposed area, and apply heat evenly with a heat gun, lighter or hot-air tool until the tubing contracts and forms a tight seal around the conductor or connector. Allow the tubing to cool and verify that it fits snugly and that any underlying repair is insulated. For best results, ensure surfaces are clean and free of sharp edges before application.

Usage recommendations

Use a regulated heat gun on low to medium setting for even shrinking; avoid open flame on sensitive components. When using tubing for critical automotive or high-temperature applications, verify the material's temperature rating and dielectric properties against the requirements of the installation.