PVC Heat Shrink Tubing 135mm Flat Wrap – RC Battery Pack Sleeve, NiMH NiCd LiPo, Multi-Color

Measure the length of your assembled battery pack and add at least 20–30mm (about 1") on each end for overlap and shrinkage allowance. For a typical RC stick pack around 150mm (≈6") long, a 1m roll gives you multiple wraps. For larger or custom packs, 2m or 3m rolls are generally recommended to avoid running short mid-project.

This tubing has a flat-wrap width of 135mm (≈5.3"), which corresponds to a recovered inner diameter of approximately Ø85mm (≈3.35"). It is designed for large-format RC battery packs, including multi-cell NiMH, NiCd, and LiPo configurations. Always measure your pack's circumference — divide by π (3.14) to get the approximate diameter — before ordering.

PVC heat shrink tubing of this type typically has a 2:1 shrink ratio, meaning it shrinks to approximately 50% of its original diameter when heated. The 135mm flat-wrap recovers to around Ø85mm inner diameter. Apply heat evenly with a heat gun at generally 90–120°C (194–248°F) for best results. Avoid overheating, which can cause bubbling or discoloration.

Yes, PVC heat shrink tubing is commonly used to sleeve LiPo, NiMH, and NiCd RC battery packs. It provides insulation and physical protection for the cells and balance leads. Always ensure the pack is fully assembled and all connections are secure before applying heat, and never exceed the recommended shrink temperature to avoid stressing the cells.

PVC heat shrink tubing generally offers good moisture resistance once shrunk, making it suitable for typical RC outdoor use — including RC cars on damp tracks and boats in light splash conditions. It is not rated for continuous submersion. For marine or heavily wet environments, consider sealing the open ends with heat-shrink end caps or silicone sealant.

The Blue (0.2mm Wall Thick) variant has a thinner wall compared to the standard colors (typically 0.3mm). Thinner-wall tubing is generally easier to shrink evenly and conforms more closely to irregular pack shapes or packs with protruding wires. Standard-wall tubing offers slightly more abrasion resistance. Choose based on your pack geometry and how much physical protection you need.

Slide the cut length of tubing over your fully assembled battery pack, leaving equal overhang on each end (typically 15–25mm / about 1"). Use a heat gun on a low-to-medium setting and move it steadily along the length of the tubing. The sleeve will shrink snugly around the pack within seconds. Avoid holding the heat gun in one spot to prevent uneven shrinkage or scorching.