Large Diameter PVC Heat Shrink Tubing 110mm–380mm | RC Battery Pack & Wire Insulation

Measure the outer diameter of your battery pack or wire bundle before shrinking. The diameter listed in each variant is the flat (expanded) width. As a general rule, choose a size that is 10–20% larger than your bundle's outer diameter to allow easy insertion. For example, a 110mm flat diameter is typically suitable for bundles up to approximately 70mm (≈2.75") in diameter. When in doubt, size up — you can always apply more heat to tighten the fit.

PVC heat shrink tubing generally has a shrink ratio of approximately 2:1, meaning it will shrink to roughly half its expanded (flat) diameter when heat is applied evenly. For example, a 200mm flat diameter tube will typically shrink down to approximately 100mm. Exact ratios may vary slightly by size — contact us to confirm for your specific variant.

PVC heat shrink tubing generally provides good moisture resistance for indoor and light outdoor use, protecting wrapped assemblies from dust, splashes, and humidity. For prolonged outdoor exposure, UV resistance, or submersion applications, we recommend verifying suitability for your specific environment. Contact us if you need guidance for harsh-environment use cases.

This PVC tubing typically activates at around 70–90°C (158–194°F). A standard heat gun set to a low-to-medium heat setting works well. Move the heat gun slowly and evenly along the length of the tube to avoid hot spots or uneven shrinkage. Avoid using open flames such as lighters or torches, as these can cause scorching, uneven shrinking, or damage to the underlying battery cells or wiring.

Yes — this large diameter PVC heat shrink tubing is widely used for wrapping LiPo and Li-ion RC battery packs used in drones, RC cars, RC boats, and other hobby builds. It provides a clean, protective outer sleeve that holds cells together, insulates the pack, and gives a finished appearance. Always confirm the flat diameter is appropriate for your specific pack dimensions before ordering.

Each piece is supplied in a 1M (≈39.4") length. Cut to your desired length using sharp scissors or a utility knife before applying heat. A clean, square cut ensures even shrinkage at both ends. For very large diameter sizes, lay the tube flat on a cutting mat and use a straight edge for a precise cut.

No — color is purely cosmetic and does not affect the electrical insulation properties or shrink performance of the tubing. All colors in this range are made from the same PVC material. Many RC builders use different colors to identify battery packs by cell count, voltage, or capacity at a glance.