White Heat Shrink Tubing 2:1 Ratio — Waterproof Wire Sleeving, φ0.6mm to φ80mm

Measure the outer diameter of the wire or connector you need to cover. Choose a tubing diameter that is typically 20–30% larger than the wire's diameter before shrinking. For example, a 4mm wire generally works well with φ5mm or φ6mm tubing. After applying heat, the tubing shrinks to approximately half its original diameter at a 2:1 ratio. When in doubt, size up — you can always trim excess length.

A 2:1 shrink ratio means the tubing will shrink to approximately half its original inner diameter when heat is applied. For example, φ10mm tubing will shrink down to roughly φ5mm, creating a snug, secure fit around the wire or component. This ratio is the most common for general-purpose wire insulation and repair.

Yes. This tubing is designed to provide waterproof insulation once properly shrunk. It generally forms a tight seal around wires and connectors, making it suitable for outdoor wiring, marine applications, and environments with moisture exposure. For fully submersed or high-pressure water applications, we recommend confirming suitability with your specific use case before ordering.

This tubing is typically rated for outdoor use and offers resistance to UV exposure, moisture, and mild chemicals. The operating temperature range is generally suitable for most automotive, electrical, and DIY applications. For extreme heat environments such as engine bays or industrial equipment, please contact us to confirm the rated temperature range before use.

A heat gun is the most reliable tool for shrinking this tubing evenly. In a pinch, a lighter or match can work for small diameters, but a heat gun provides more consistent results and reduces the risk of scorching or uneven shrinkage. Apply heat evenly along the length of the tubing, moving the heat source back and forth for best results.

This tubing is compatible with a wide range of wire gauges and connector types. The available diameters from φ0.6mm to φ80mm cover everything from fine signal wires to large cable bundles and butt connectors. It is generally compatible with standard AWG and metric wire sizes used in automotive, marine, home electrical, and electronics applications.

Measure the total length of wire or connector area you need to cover, then add 10–15% extra for trimming and overlap. This product is available in lengths from 1M up to 50M, making it easy to order the right amount for small repairs or large wiring projects. Buying a longer roll typically offers better value per meter.