White 2:1 Heat Shrink Tubing — 0.6mm to 12mm, 1M / 5M / 10M Lengths

Select a diameter that is typically 20–30% larger than the bare wire or connector you need to cover. For example, for a 2mm wire, a 2.5mm or 3.0mm tube generally provides a clean, snug fit after shrinking. After applying heat, the tubing shrinks to approximately half its original diameter (2:1 ratio).

A 2:1 shrink ratio means the tubing will shrink to roughly half its original inner diameter when heat is applied. For example, a 6.0mm tube will shrink down to approximately 3.0mm, conforming tightly around the wire or component.

This tubing generally requires a heat source of around 70–120°C (158–248°F) to activate shrinking. A heat gun is recommended for even, controlled application. A lighter can work in a pinch but may cause uneven shrinkage or discoloration on the white finish.

Standard polyolefin heat shrink tubing is generally suitable for light outdoor use and is commonly used in automotive wiring harness repairs. It is typically resistant to oils, fuels, and moderate heat. For continuously wet or marine environments, an adhesive-lined dual-wall heat shrink is usually recommended for a waterproof seal.

As a general rule, cut the tubing about 20–30% longer than the area you need to cover, since the tubing will also shrink slightly in length when heat is applied. For example, to cover a 50mm (≈2") splice, cut approximately 60–65mm (≈2.5") of tubing.

For 22 AWG wire (typically around 0.6–0.7mm conductor diameter), the 1.0mm or 1.5mm tubing generally works well. For 18 AWG wire (typically around 1.0–1.2mm conductor diameter), the 1.5mm or 2.0mm size is a common choice. Always measure your specific wire's outer diameter including insulation if you are sleeving over the jacket.

This tubing is intended for general-purpose DIY, hobby, and light electrical applications. For high-voltage, industrial, or safety-critical wiring, please contact us to confirm the voltage and temperature ratings for your specific diameter before ordering.