PVC Heat Shrink Tube for Battery Pack Wrap & Insulation — 70–95mm Wide, 8 Colors

Measure the circumference of your battery or pack, then divide by 2 to get the required flat width. For example, a cylindrical cell with an 88mm circumference needs a 44mm flat-width tube — that's our 70mm (Φ44mm) option. When in doubt, size up slightly so the tube slides on easily before shrinking. The Φ value listed for each variant is the approximate recovered inner diameter after heat is applied.

PVC heat shrink tubing typically shrinks to roughly 50% of its original flat width when heat is applied — a 2:1 shrink ratio. The diameter listed (e.g., Φ44mm for the 70mm flat-width option) represents the approximate recovered diameter after shrinking. Actual shrinkage may vary slightly depending on heat application method and duration.

PVC heat shrink tubing generally activates at temperatures around 70–90°C (160–195°F). A heat gun on a low or medium setting works well. Move the heat gun slowly and evenly around the tube to avoid hot spots. Avoid open flames, which can scorch or melt the material unevenly and may damage the battery cells underneath.

PVC heat shrink tubing provides good moisture resistance for general indoor and light outdoor use. It is well-suited for battery storage, workshop use, and protected outdoor enclosures. For prolonged outdoor exposure, UV-heavy environments, or submersion, an adhesive-lined polyolefin alternative is generally recommended. If you're unsure, contact us with your application details.

Yes. The 70mm (Φ44mm) size is commonly used for single 18650 or 21700 cells and small packs. Larger flat widths (80–95mm) are typically used for multi-cell packs or larger cylindrical batteries. Always verify the circumference of your specific pack before ordering. If you're building a custom pack, feel free to contact us and we can help confirm the right size.

Measure the length of the battery or object you need to cover and add at least 10–20mm (≈0.4–0.8") of overlap on each end to ensure full coverage after shrinking. We offer 1M, 2M, 5M, and 10M rolls so you can buy exactly what your project requires — or stock up for multiple builds at a lower per-meter cost.

PVC heat shrink tubing in this size range is generally rated for low-voltage insulation applications (typically up to 600V). For high-voltage or safety-critical applications, please contact us to confirm specifications before purchasing. This tubing is intended for DIY battery wrapping, cable management, and general insulation — not for certified electrical installations requiring UL or CSA listed materials.