Measure the section of cable or bundle you need to cover and add at least 10–15% extra to account for shrinkage along the length. For most applications, 1 meter (approx. 39.4") covers a single run, while 2 meters (approx. 78.7") suits longer conduit wraps or multiple joints in one project.

A 2:1 ratio means the tubing shrinks to approximately half its original diameter when heat is applied. This 100mm tubing will shrink down to roughly 50mm (approx. 1.97"), making it suitable for large cable bundles, conduit ends, and thick wire harnesses.

Heat shrink tubing of this type generally provides solid electrical insulation, typically rated for voltages up to 600V in standard polyolefin grades. For exact dielectric ratings specific to this product, please contact us to confirm before use in safety-critical applications.

Standard polyolefin heat shrink tubing is generally moisture-resistant and suitable for protected outdoor use. For fully submersed or harsh marine environments, we recommend confirming the specific grade with us before purchase. The black variant typically offers better UV resistance than the transparent option.

A heat gun is the recommended tool for even, controlled shrinkage across a large-diameter sleeve like this. A lighter or torch can work in a pinch but may cause uneven shrinking or scorching on 100mm tubing. Keep the heat source moving in a slow, sweeping motion to avoid hot spots.

The transparent variant is designed to remain visually clear after shrinking, allowing you to see cable labels, color coding, or connector markings underneath. Clarity may vary slightly depending on heat application technique — even, moderate heat generally produces the clearest result.

This tubing fits cables and bundles with an outer diameter of up to approximately 100mm (approx. 3.94") before shrinking. After full shrinkage at 2:1 ratio, it conforms to diameters down to roughly 50mm (approx. 1.97"). Always measure your bundle's outer diameter before ordering to ensure a proper fit.