Yellow-Green Heat Shrink Tubing – Electrical Wire Sleeving & Cable Insulation (φ1mm–50mm)

Measure the outer diameter of your wire or connector before shrinking. Generally, choose a tubing diameter that is 20–30% larger than the object you want to cover. For example, a 4mm wire typically works well with φ5mm or φ6mm tubing. When in doubt, size up — you can always shrink tighter, but you cannot stretch tubing that is too small. A quick reference: AWG 22 wire is typically ~1.6mm OD, AWG 14 is ~2.5mm OD, and AWG 4 is ~6mm OD.

This tubing generally features a 2:1 shrink ratio, meaning it shrinks to approximately half its original diameter when heat is applied. For example, φ10mm tubing will recover to approximately φ5mm. Please confirm the exact ratio for your selected size variant if tight tolerances are required for your application.

This tubing is typically made from polyolefin, which generally offers good resistance to moisture, UV exposure, and mild chemicals. For long-term outdoor or harsh-environment use, we recommend confirming the specific material rating for your size. If you need adhesive-lined (waterproof/glue-lined) heat shrink tubing for fully sealed connections, please contact us — we may carry that option separately.

Yes, polyolefin heat shrink tubing is widely used for electrical wire insulation, splicing, and connector protection. It generally provides good dielectric strength suitable for low-voltage applications (typically up to 600V for standard polyolefin grades). For high-voltage or safety-critical installations, please contact us to verify the voltage rating for your specific diameter variant before ordering.

Yellow-green is the internationally recognized color code for protective earth (ground) conductors, as defined by IEC 60446 and adopted in most countries including the US (NEC Article 250), EU, and Australia. Using yellow-green heat shrink tubing on ground wires ensures clear, compliant identification during installation, inspection, and future maintenance — reducing the risk of dangerous misidentification.

A heat gun is the recommended tool for best results. Apply heat evenly by moving the gun back and forth along the tubing — do not hold it in one spot. The tubing typically activates around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). While a lighter or match can work in a pinch for small diameters, open flames risk scorching the tubing, creating uneven shrinkage, or damaging the wire insulation underneath. A heat gun gives you consistent, professional results.

Measure the total length of wire or cable you need to cover, then add 10–15% extra for trimming and overlap at each end. For small repairs or a few splices, 2M–4M is usually sufficient. For panel wiring, automotive harness work, or multiple connections, 10M–20M rolls offer better value. The 50M bulk roll is ideal for workshops, electricians, or ongoing projects where you want stock on hand.