Heat Shrink Tube CellPack 427622 CR 25.4/12.7 mm (1" to 1/2") mixed sizes

CellPack heat shrink tube model 427622 CR includes two sizes of heat-shrinkable tubing with nominal diameters of 25.4 mm and 12.7 mm (1" and 1/2"). This tubing is made for heat-activated radial contraction to provide reliable mechanical protection and electrical insulation for splices, terminals and cable joints. The mixed-size set simplifies repair and installation tasks by covering common cable diameters used in household, industrial and automotive wiring.

Advantages

The heat shrink tube delivers consistent shrink ratio and clean, tight fit around conductors and connectors after heating. Its material resists abrasion and provides basic moisture resistance, improving the longevity of cable connections. Mixed diameters in a single set reduce the need to keep multiple separate tubes on hand and speed up maintenance or installation work.

Suitable for

• Insulating and protecting spliced wires and cable joints
• Covering terminals and connectors to prevent short circuits
• Bundling and organising wiring runs in equipment and vehicles
• Repairing damaged outer layers of cables and providing strain relief

Key specifications

• Material: heat-shrinkable polymer designed for electrical insulation
• Available diameters (nominal before shrink): 25.4 mm and 12.7 mm
• Shrink activation: heat (heat gun or torch) for radial contraction
• Typical applications: splices, terminals, cable joints and bundling
• Physical properties: abrasion-resistant outer surface and flexible after shrinking

How to use

Select the tube diameter slightly larger than the cable or connector to be covered, slide the tube over the joint or bundle, and apply even heat until the tubing contracts and conforms tightly around the parts. Ensure the heat source is moved continuously to avoid overheating a single spot; allow the tubing to cool to room temperature before handling to ensure a stable fit and insulation.

Usage recommendations

For best results use a controlled heat gun set to the manufacturer-recommended temperature range; avoid direct high-flame exposure on small-diameter tubing. Choose the larger diameter for multi-core or connector-covered joints and the smaller diameter for individual conductor insulation. Inspect shrunk joints for uniform fit and absence of gaps to ensure mechanical protection and electrical insulation.