Heat Shrink End Caps with Adhesive Glue Lined — 8mm to 130mm, 2:1 Ratio, 35KV Rated

Measure the outer diameter of your cable or bundle before shrinking. The cap's inner diameter before shrinking should be larger than your cable OD. With a 2:1 shrink ratio, the cap will shrink to approximately half its original diameter. For example, a 20mm cap will shrink to roughly 10mm (≈3/8"). Always size up slightly to allow the adhesive to flow and seal properly. If your cable OD is 18mm, the 20mm cap is typically the right choice.

These heat shrink end caps are rated at 35KV, making them suitable for medium-voltage electrical insulation applications. They are generally used in automotive, marine, and industrial wiring where reliable dielectric protection is required. For safety-critical high-voltage installations, always verify compliance with your local electrical code.

Yes. The inner adhesive lining melts during shrinking and forms a watertight seal around the cable end. This makes them suitable for outdoor, marine, and underground applications where moisture ingress is a concern. For prolonged UV exposure, additional UV-resistant jacketing is typically recommended over the cap.

These are universal end caps designed to fit over bare wire ends, cable terminations, and rod ends — they are not thread-specific. Compatibility depends on the outer diameter of the object being sealed. The size range of 8mm to 130mm covers most standard wire gauges, cable assemblies, and conduit ends used in automotive, marine, and industrial settings.

These caps typically require a heat source of around 120–150°C (248–302°F) to activate shrinking and melt the adhesive lining. A heat gun is the recommended tool for even, controlled heat application. Open flames (such as a lighter or torch) can be used carefully but may cause uneven shrinking or surface scorching if held too close.

Yes. The adhesive glue-lined construction creates a moisture-resistant, vibration-resistant seal that is well-suited for automotive battery cable ends, trailer wiring harnesses, and similar environments where corrosion and water exposure are common. The color options (Red/Black) also align with standard automotive wiring conventions for positive and negative terminals.

The color options are primarily for identification and organization — for example, using Red for positive terminals, Black for negative, and Green for ground in electrical systems. All three colors share the same material properties, 2:1 shrink ratio, and 35KV voltage rating. Choose based on your wiring color code standard.