PVC Heat Shrink Tubing – Flat Wide 17mm–103mm | 5 Colors | 1m / 5m / 20m Rolls

Measure the outer diameter of the object you need to cover, then select a flat width whose recovered inner diameter (Ø) is slightly larger than that measurement. For example, a 10mm diameter wire bundle typically fits the 17mm flat-wide size (Ø10.8mm recovered). All variants in this listing display both the flat width and the Ø value to make selection straightforward. When in doubt, size up by one step — oversized tubing will still shrink down, but undersized tubing will not slide over the component.

Quick reference: 1 inch ≈ 25.4mm. So a 1" diameter battery pack would need at least a 27mm flat-wide size (Ø17.2mm recovered) or larger.

This PVC heat shrink tubing generally has a 2:1 shrink ratio, meaning the recovered inner diameter is approximately half the flat width. For example, the 17mm flat-wide size recovers to approximately Ø10.8mm. The exact recovered diameter is listed in each variant name for your reference. Longitudinal (length) shrinkage is typically minimal — generally less than 5–10% — but allow a small margin when cutting to length.

PVC heat shrink tubing provides basic moisture resistance and is generally suitable for light-duty outdoor or damp-environment use, such as protecting wire splices in garden lighting or automotive underhood wiring. However, it is not a waterproof seal — moisture can still enter from the open ends. For fully waterproof applications or prolonged UV exposure, a dual-wall adhesive-lined heat shrink tubing is typically recommended. Contact us to confirm suitability for your specific environment.

PVC heat shrink tubing typically activates at around 70–90°C (158–194°F). Suitable tools include a heat gun set to a low or medium setting, a hot-air rework station, or a lighter held at a safe distance and kept moving. Avoid concentrating heat in one spot to prevent scorching or uneven shrinkage. Do not use an open flame directly on the tubing surface.

Yes. The larger flat-wide sizes in this listing — particularly 43mm through 103mm — are commonly used to wrap RC battery packs, LiPo cells, NiMH packs, and Li-ion battery assemblies. The tubing provides electrical insulation and a clean, professional finish without adding significant weight. Measure your battery pack's perimeter and divide by π (≈3.14) to estimate the required diameter, then select the appropriate flat-wide size.

For a single wire splice or connector repair, 1m is typically more than enough. For a small wiring project with multiple joints, 5m offers a comfortable margin. If you are wrapping multiple battery packs, building wiring harnesses, or stocking up for ongoing projects, the 20m roll is generally the most cost-effective option per meter. The 20m roll is also popular with RC builders and electronics workshops that use heat shrink tubing regularly.

Five colors are available: Black, White, Red, Blue, and Transparent. Color is purely cosmetic and does not affect the shrink ratio, insulation properties, or temperature rating. Transparent tubing is particularly useful when you want labels, markings, or component details to remain visible after shrinking. Red and Blue are popular for color-coding positive and negative leads in wiring harnesses.