Heat-shrink tubing Radpol RCKH1 12/3 MIX 4-967-10 — 12 mm diameter, 3:1 shrink ratio

Radpol RCKH1 12/3 MIX 4-967-10 is a heat-shrink tubing specified with a 12 mm nominal diameter and a 3:1 shrink ratio, designed for electrical insulation and mechanical protection of cables and connectors. The tubing provides controlled radial shrinkage to conform tightly around irregular shapes, delivering dielectric isolation, abrasion resistance and improved moisture protection for cable joints, splices, terminals and harnesses in industrial or automotive wiring.

Advantages

This heat-shrink tubing offers consistent shrink performance due to its 3:1 ratio, enabling use with a range of initial diameters while achieving a secure tight fit after heating. The material provides a protective dielectric layer that reduces the risk of short circuits and enhances mechanical strength at connection points. It also resists abrasion and provides a degree of moisture protection that helps maintain connection reliability in demanding environments.

Suitable for

• Insulating cable joints and wire splices in automotive and industrial wiring
• Protecting terminals and connectors from abrasion and contaminants
• Bundling and organizing cable harnesses
• Repairing damaged insulation on cables and wires

Key specifications

• Nominal diameter before shrink: 12 mm
• Shrink ratio: 3:1 (reduces to approximately one third of original diameter when heated)
• Primary function: electrical insulation and mechanical protection
• Properties: dielectric insulation, abrasion resistance, improved moisture resistance
• Typical applications: cable joints, splices, terminals, harnesses

How to use

Select a piece of tubing with a nominal diameter large enough to pass over the connector or splice before heating. Slide the tubing into position covering the joint or terminal, then apply heat evenly using a heat gun or other controlled heat source until the tubing shrinks tightly around the part and conforms to its shape. Allow the tubing to cool and inspect the fit to ensure complete sealing and secure mechanical protection.

Usage recommendations

For reliable results, pre-clean contact surfaces and remove sharp edges or burrs before applying the tubing. Use a temperature-controlled heat gun and apply heat gradually to avoid overheating adjacent components. Choose tubing length that provides at least 5–10 mm overlap on each side of the joint for optimal insulation and mechanical support.