PVC Heat Shrink Tubing for Battery Wrap — Silver Gray, Flat Width 17–300mm

Measure the circumference of your battery or bundle, then divide by 2 to get the required flat width. For example, a standard 18650 cell (≈18.5mm diameter) has a circumference of about 58mm, so a flat width of 29.5mm (Φ 18.5mm) is typically the right fit. When in doubt, size up slightly — PVC shrink tubing generally shrinks 40–50% in diameter when heat is applied.

Quick reference: 17mm flat width → Φ 10.8mm inner | 31mm → Φ 20mm | 50mm → Φ 32mm | 100mm → Φ 64mm (approx). Full size chart is in the variant selector above.

PVC heat shrink tubing generally has a 2:1 shrink ratio, meaning it shrinks to approximately half its original diameter when heated. This is suitable for most battery cell rewrapping and wire bundling applications. If you need a tighter fit on irregular shapes, consider a 3:1 adhesive-lined option instead.

PVC heat shrink tubing is generally moisture-resistant and provides a degree of protection against humidity and light splashing. However, it is not rated for continuous outdoor UV exposure or full submersion. For harsh outdoor or waterproof applications, adhesive-lined polyolefin tubing is typically a better choice.

This tubing typically activates at around 90–120°C (194–248°F). A heat gun set to low or medium is recommended. Move the heat gun steadily along the tubing to ensure even shrinkage. Avoid open flames, as uneven heat can cause scorching, bubbling, or uneven shrinkage on battery cell wraps.

Yes. The available flat widths (17mm through 300mm) cover a wide range of cylindrical cells. The 29.5mm flat width (Φ 18.5mm) is a common match for 18650 cells. For 21700 cells (≈21mm diameter), the 31mm flat width is generally a good fit. For 26650 cells (≈26mm diameter), the 43mm flat width is typically appropriate. Always verify your cell's exact diameter before ordering.

For individual cell wrapping, 1–2 meters is typically sufficient for small hobby projects (10–20 cells). For larger battery packs, e-bike batteries, or bulk wiring jobs, the 5-meter or 20-meter rolls offer better value per meter. We recommend measuring your total wrap length and adding 10–15% for trimming and waste.

Yes. In addition to battery cell wrapping, PVC heat shrink tubing is widely used for wire insulation, cable bundling, strain relief on connector terminations, and color-coding electrical connections. The silver gray color is commonly used in automotive wiring harness repair and industrial panel wiring applications.