Heat shrink tubing Radpol RCK 8/2 MIX, 8 mm to 2 mm shrink ratio, assorted colors

Radpol RCK 8/2 MIX heat shrink tubing provides durable electrical insulation and mechanical protection for wires, cable joints and connectors. The product has a nominal diameter of 8 mm and shrinks down to approximately 2 mm, allowing a secure fit over a wide range of conductor and splice sizes. Supplied in mixed colors, this tubing supports color-coding and straightforward identification in electronics, automotive repairs and general electrical installations.

Advantages

The tubing offers reliable dielectric insulation and abrasion resistance after heat application, with consistent shrink performance from 8 mm to around 2 mm. Mixed colors simplify wiring identification and repair work, while the flexible material conforms to irregular shapes and maintains a compact protective layer. The product is suitable for repetitive use in workshop and field environments due to its ease of application and steady shrink ratio.

Suitable for

• Insulating single conductors and multi-core cable splices
• Protecting soldered joints and crimp connections
• Color-coding wiring harnesses and connectors
• Repairing outer insulation on small cables in automotive and consumer electronics

Key specifications

• Nominal initial diameter: 8 mm
• Approximate recovered diameter: 2 mm
• Shrink ratio: 4:1 (8 mm to 2 mm)
• Material: heat-shrinkable polymer (polyolefin-type)
• Available in assorted/mixed colors for identification
• Typical use: electrical insulation and mechanical protection

How to use

Slide a length of tubing over the conductor or joint before making the final connection. After soldering or crimping, position the tubing to cover the exposed area completely. Apply heat evenly using a heat gun, hot-air tool or suitable heat source until the tubing contracts and conforms snugly to the underlying shape. Allow the tubing to cool and verify a tight fit and full coverage of the insulated area.

Usage recommendations

For consistent results, use a controlled heat gun setting and move the heat source evenly to avoid overheating. Choose a tubing length that provides at least 5–10 mm overlap on each side of the splice or exposed conductor. When working on automotive or high-vibration installations, ensure the tubing fully covers stress points and consider layering tubing for added mechanical protection.