Heat Shrink Tubing φ1mm–50mm | Electrical Wire Sleeving | Multiple Colors

Measure the outer diameter (OD) of the wire, connector, or solder joint you need to cover. Select a tubing size whose expanded (pre-shrink) diameter is at least 10–20% larger than that measurement. After applying heat, the tubing typically shrinks to roughly half its original diameter (2:1 ratio). For example, φ6mm tubing generally fits objects up to about 5mm OD and shrinks down to approximately 3mm. When in doubt, size up — a slightly loose fit before shrinking is fine; a tubing that won't slide over the connector is not.

This tubing is generally rated at a 2:1 shrink ratio, meaning it shrinks to approximately half its supplied (expanded) diameter when heat is applied. So φ10mm tubing typically recovers to around φ5mm. If your application requires tighter tolerances, contact us to confirm the exact recovered diameter for your chosen size.

Most standard polyolefin heat shrink tubing begins to shrink at around 70–90°C (158–194°F) and fully recovers at approximately 120°C (248°F). A heat gun set to low or medium is typically sufficient. Move the heat gun slowly and evenly along the tubing to avoid hot spots. Avoid using open flames (lighters, torches), which can scorch or melt the tubing unevenly.

Standard polyolefin heat shrink tubing generally provides good moisture resistance once fully shrunk, making it suitable for many outdoor and damp-location applications such as garden lighting, outdoor speaker wiring, and marine above-deck connections. However, for fully waterproof or submersible installations, we recommend using adhesive-lined (dual-wall) heat shrink tubing, which creates a sealed barrier. Contact us to confirm suitability for your specific environment.

Yes. Polyolefin heat shrink tubing is widely used in automotive wire harness repair, marine electrical systems, and industrial control panels. It is generally resistant to fuels, oils, and common solvents encountered in engine bays and bilge areas. For high-vibration environments or prolonged saltwater exposure, we recommend confirming the specific variant's chemical resistance ratings before installation.

Each listing is sold as a single continuous roll in your choice of 5 meters (≈16.4 ft) or 10 meters (≈32.8 ft). Select your preferred diameter and length from the variant dropdowns above before adding to cart. If you need larger quantities, contact us — bulk pricing may be available.

This heat shrink tubing is available in brown, orange, purple, gray, and yellow-green. Using different colors for different circuits, voltage levels, or wire gauges is a widely accepted practice in automotive, marine, and industrial wiring. Color-coding with heat shrink tubing makes future troubleshooting, maintenance, and modifications significantly faster and safer. Each color is sold separately so you can order exactly the combination you need.

Absolutely. Cut the tubing to any length you need using standard scissors or a utility knife before sliding it over the wire or connector. Cut ends are clean and will not fray or unravel. For best results, cut the tubing slightly longer than the area you need to cover, as the tubing may shorten slightly in the longitudinal direction when heat is applied.