Orange Heat Shrink Tubing 3:1 with Adhesive Glue Lined — 3.2mm to 30mm, 1m–10m

Select a diameter that is typically 20–30% larger than the outer diameter of the object you are covering before shrinking. For example, if your cable measures 6mm, a φ7.9mm tube generally provides a snug fit after shrinking. The 3:1 shrink ratio means the tubing will shrink down to roughly one-third of its supplied diameter, so there is more room for error than with 2:1 tubing.

Dual-wall adhesive-lined heat shrink tubing of this type generally activates at around 70–90°C (158–194°F) and fully shrinks at approximately 120–135°C (248–275°F). A heat gun is recommended over an open flame for even, controlled shrinkage. Move the heat gun steadily along the tube rather than holding it in one spot to avoid scorching.

Yes. The inner adhesive layer melts and flows during shrinking to create a moisture-resistant seal around the substrate. This makes it well-suited for marine wiring, outdoor electrical connections, and other environments where moisture ingress is a concern. For fully submerged applications, contact us to confirm suitability for your specific conditions.

A 2:1 ratio means the tubing shrinks to half its original diameter, while a 3:1 ratio shrinks to one-third. The 3:1 ratio is better for covering connectors, splices, or irregular shapes where a tighter, more conforming fit is needed. The adhesive lining in this product adds an additional sealing layer not found in standard single-wall tubing, making it more suitable for demanding environments.

Yes. Adhesive-lined heat shrink tubing is commonly used in automotive wiring harnesses, battery terminal protection, and connector sealing. The orange color also aids in visual identification of specific circuits or wire groups within a harness. The tubing generally tolerates the temperature ranges found in engine bays, though placement near direct heat sources should be evaluated case by case.

Standard scissors or a sharp utility knife work well for clean cuts on smaller diameters. For larger diameters such as φ19.1mm–φ30mm, a rotary cutter or PVC pipe cutter generally produces a cleaner, more perpendicular edge. Cut slightly longer than needed — you can always trim after shrinking, but you cannot add length back.

Lengths from 1m to 10m are available. For occasional repairs or small projects, 1–2m is typically sufficient. For wiring harness builds, marine rigging, or bulk electrical work, 5m or 10m rolls offer better value per meter. The φ30mm diameter also comes in a 6m option for mid-range project needs.