Heat Shrink End Cap Tubing 2:1 Glue-Lined — 8mm to 130mm, Black Red Green

Measure the outer diameter of your cable or bundle before shrinking. The first number in the diameter label (e.g., 8 in 8*25mm) is the inner diameter before shrinking. Choose a size where the pre-shrink ID is at least 20–30% larger than your cable OD to allow easy insertion. After shrinking at the 2:1 ratio, the tube will grip tightly around the cable end.

These glue-lined end caps typically require a heat source of around 120–150°C (248–302°F) to begin shrinking, and the internal adhesive generally activates fully at around 150°C. A heat gun is recommended for even, controlled application. Avoid open flames, which can scorch the tubing unevenly and compromise the seal.

Yes. The internal hot-melt adhesive lining melts and flows around the cable or wire end during shrinking, creating a moisture-resistant seal. This makes them suitable for outdoor, marine, and automotive environments where moisture ingress is a concern. For full submersion applications, verify suitability with your specific installation.

Generally yes. The polyolefin outer shell is resistant to UV exposure, oils, and mild chemicals, making these end caps suitable for outdoor wiring, boat cable terminations, and automotive underhood applications. For prolonged saltwater immersion, confirm suitability with your specific installation requirements before use.

Regular heat shrink tubing is open at both ends and covers the length of a wire. A heat shrink end cap is closed at one end, fully sealing the tip of a wire bundle, cable lug, or exposed conductor — preventing moisture, corrosion, and short circuits at the termination point. End caps are the right choice when you need to seal a wire end, not just insulate along its length.

All three colors offer the same performance. Color choice is typically used for circuit identification: Black is the most common general-purpose choice, Red is often used for positive or high-voltage leads, and Green is commonly used for ground or earth connections in electrical systems. Choose based on your wiring convention or personal preference.

Each meter of tubing can be cut into multiple end caps depending on the cap depth you need. For a single project or to test a size, 1 meter is typically sufficient. For ongoing electrical work, automotive builds, or marine installations, the 5m or 10m rolls offer better value per cap and reduce reorder frequency.