Heat Shrink Tube Cabletech 3 mm x 1 m, red, model LEC-NAR0255.1

Heat shrink tube Cabletech 3 mm x 1 m in red is a flexible thermoplastic sleeve designed to provide electrical insulation, mechanical protection and neat cable management. When heated, the tube contracts to form a tight protective layer around wires, joints and small cable bundles. This red heat shrink tube is intended for tasks where a small-diameter sleeve is needed to protect connections and prevent abrasion, moisture ingress and short circuits.

Advantages

The Cabletech heat shrink tube offers uniform shrinkage and reliable dielectric properties suitable for low-voltage electrical and electronic applications. Its 3 mm initial diameter and 1 m length allow precise cuts to match the required coverage length. The red color provides clear visual identification for wires and cable groups. The tube is easy to apply with a heat source and creates a secure fit that resists slipping and provides added mechanical reinforcement at solder joints or splices.

Suitable for

• Insulating soldered joints and splices in electronics and hobby projects
• Bundling and color-coding small wire harnesses
• Protecting exposed wire ends and connectors in automotive and marine applications (low-voltage)
• Repairing cable insulation and preventing abrasion on exposed conductors

Key specifications

• Material: thermally shrinkable polymer (heat-shrinkable tubing)
• Nominal diameter before shrinkage: 3 mm
• Length: 1 m
• Color: red
• Shrink ratio: typical for small-diameter tubing (designed to form a close fit when heated)
• Primary functions: electrical insulation, mechanical protection and cable identification

How to use

Select a section of the tube slightly longer than the area to be insulated, slide it over the wire or joint, and apply even heat until the tubing contracts and conforms to the underlying shape. Use a heat gun, lighter or hot-air tool at an appropriate distance to avoid overheating; move the heat source evenly along the length until a uniform shrink is achieved. Allow the sleeve to cool before handling and verify that it forms a tight, wrinkle-free seal around the conductor or connector.

Usage recommendations

For best results use a controlled hot-air tool or heat gun set to a moderate temperature and keep the heat source moving to prevent burning the tubing or underlying insulation. Choose the correct tubing diameter for the wire size to ensure a secure fit after shrinking and trim the length to cover the exposed area while leaving a small margin for overlap.