PVC Heat Shrink Tubing for RC Battery Packs — 7mm to 125mm, 13 Colors

Measure the circumference of your battery pack at its widest point and divide by 2 — that gives you the minimum flat width needed. For example, a pack with a 60mm circumference needs at least 30mm flat width. We recommend choosing the next size up (e.g., 31mm or 36mm) to allow easy sliding before shrinking. As a general rule, going 10–20% larger than your calculated flat width gives the best fit after heat is applied.

Quick inch reference: 25mm ≈ 1", 50mm ≈ 2", 100mm ≈ 3.9".

This PVC tubing typically has a 2:1 shrink ratio, meaning it shrinks to approximately half its original inner diameter when fully heated. For example, a 50mm flat width (Φ 32mm) will generally shrink down to around Φ 16mm. This is generally sufficient for wrapping most RC battery packs and cylindrical cell assemblies.

PVC heat shrink tubing typically begins to shrink at around 70–90°C (158–194°F). A standard heat gun set to low or medium is the recommended tool. Move the heat gun in a steady sweeping motion from one end to the other to avoid hot spots. Avoid using open flames such as lighters or torches, as these can scorch or melt the tubing unevenly.

Yes. PVC heat shrink tubing is widely used in the RC hobby community for wrapping LiPo, NiMH, and NiCd battery packs. It provides electrical insulation and mechanical protection for the outer surface of the pack. Always ensure the battery is fully cooled before applying heat, and avoid overheating the tubing directly against sensitive cell surfaces.

PVC heat shrink tubing generally offers good resistance to light moisture and dust, making it suitable for typical RC outdoor use. However, it is not rated for continuous submersion or prolonged exposure to standing water. For applications in high-humidity or wet environments, consider applying additional sealing at the open ends of the tubing.

No. The 13 available colors — Black, White, Blue, Clear, Green, Yellow, Red, Brown, Orange, Light Green, Silver-Gray, Purple, and Pink — are purely cosmetic. All colors share the same PVC material properties and shrink characteristics. Many RC builders use different colors to quickly identify battery packs by cell chemistry, voltage, or capacity in the field.

1. Measure your pack and select the correct flat width (see sizing tip above). 2. Cut the tubing to your desired length with scissors or a utility knife — add about 10–15mm extra on each end for overlap. 3. Slide the tubing over the assembled battery pack. 4. Apply even heat with a heat gun, starting from the center and working outward, until the tubing conforms tightly to the pack surface. 5. Allow to cool before handling.