This tubing has a supplied inner diameter of 120mm (approximately 4.72"). With a 2:1 shrink ratio, it will shrink down to a recovered diameter of typically around 60mm (approximately 2.36"). It is suited for large cable bundles, conduit ends, pipe insulation, and similar large-diameter applications. Always measure your bundle's outer diameter before ordering to ensure a proper fit.

A 2:1 shrink ratio means the tubing will shrink to approximately half its original supplied diameter when heat is applied. For this 120mm tube, the recovered diameter is generally around 60mm (≈2.36"). This ratio is the most common standard for general electrical insulation and cable bundling applications.

Polyolefin heat shrink tubing typically offers good tensile strength and resistance to abrasion, making it suitable for protecting cable bundles from mechanical wear and minor impacts. It is not designed as a primary structural load-bearing component, but it provides reliable insulation and strain relief in most electrical and industrial wiring applications.

Standard polyolefin heat shrink tubing generally offers resistance to moisture, UV exposure, and mild chemicals, making it suitable for many outdoor and marine wiring applications. However, for fully waterproof connections — such as underwater or fully submerged use — an adhesive-lined (dual-wall) heat shrink tubing is generally recommended. Contact us to confirm suitability for your specific environment.

Polyolefin heat shrink tubing typically begins to shrink at around 70°C–90°C (158°F–194°F) and fully recovers at approximately 120°C (248°F). A heat gun is the recommended tool for large-diameter tubing like this 120mm sleeve, as it provides even, controlled heat distribution. Open flames are generally not recommended as they can cause uneven shrinkage or scorching of the material.

Polyolefin heat shrink tubing is widely used in electrical, automotive, and industrial applications and is generally compatible with standard copper and aluminum conductors. For compliance with specific standards (UL, RoHS, MIL-SPEC, etc.), please contact us to confirm before ordering.

Choose based on the total length of cable or bundle you need to cover. For a single large splice or conduit end, 1 Meter is typically sufficient. For longer cable runs, multiple joints, or if you want extra material on hand for future use, the 2 Meter option offers better value. Remember to account for any overlap at connection points when estimating the length you need.