3:1 Adhesive-Lined Heat-Shrink Tubing Ø19.1–6.36 mm Black – 1 m

This adhesive-lined heat-shrink tubing provides electrical insulation, mechanical protection and additional sealing for cables, terminals, connectors and electrical joints.

When heated, the tubing shrinks around the component. At the same time, the internal hot-melt adhesive melts and fills the space between the tubing and cable, helping prevent the ingress of moisture, dust and other contaminants.

Its 3:1 shrink ratio allows the tubing to pass over larger connectors or components before shrinking to a diameter of 6.36 mm. It is therefore suitable for larger cables, plugs, coaxial joints and repairs requiring a strong protective covering.

Manufactured from black polyolefin, it provides good mechanical, electrical and environmental resistance. The one-metre length can be cut according to the requirements of each installation.

Main features

• Type: dual-wall heat-shrink tubing
• Internal lining: hot-melt adhesive
• Outer material: polyolefin
• Shrink ratio: 3:1
• Diameter before shrinking: 19.1 mm
• Fully recovered diameter: 6.36 mm
• Length: 1 m
• Colour: black
• Operating temperature: –55 to +125 °C
• Application: hot-air shrinking
• Can be cut to the required length
• Provides electrical insulation
• Protects against abrasion and mechanical stress
• Adhesive helps protect against moisture and dust
• Suitable for cables, terminals, plugs and connectors
• Sold: individually in one-metre lengths

Main advantages

• High 3:1 shrink ratio
• Suitable for larger cables and connectors
• Internal adhesive for improved sealing
• Reinforces and protects connection points
• Adapts to irregular shapes and diameters
• Clean and professional finish
• Easy to cut and apply
• Suitable for electrical, electronic and automotive use

Recommended applications

• Insulating electrical connections
• Protecting terminals and solder joints
• Sealing connectors
• Protecting coaxial cables
• Reinforcing cable exits from plugs
• Repairing cable insulation
• Antenna and radio communication cables
• Automotive and marine installations
• Electronics and telecommunications
• Protection against moisture and abrasion

Application instructions

1. Cut the tubing to the required length.
2. Slide it onto the cable before making the joint or fitting the connector.
3. Position the tubing over the area to be protected.
4. Heat it evenly using a hot-air gun.
5. Continue heating until fully recovered and a small amount of adhesive appears at the ends.
6. Allow it to cool before moving the cable.

Important note

Before installation, make sure the 19.1 mm initial diameter will pass over the widest component and that the 6.36 mm recovered diameter is small enough to grip the cable securely.

A hot-air gun is recommended. Avoid direct flames, as they may burn the tubing, damage the cable insulation or cause uneven shrinking.

The adhesive improves moisture resistance, but the final seal depends on correct surface preparation and application. Do not assign a specific IP rating to the completed assembly without appropriate testing.