91mm PVC Heat Shrink Tubing for Battery Packs & Cable Wire Wrap — 7 Colors

91mm refers to the flat (lay-flat) width before shrinking. The circumference before shrinking is approximately 182mm, giving a pre-shrink diameter of roughly 58mm (≈2.3"). After applying heat, PVC tubing typically shrinks to about 50% of its original diameter, so this tubing generally fits objects up to approximately 55–58mm (≈2.2") in diameter. For battery packs, measure the widest cross-section and choose a size with at least 10–15% clearance for easy sliding.

PVC heat shrink tubing typically activates at around 90–120°C (194–248°F). A heat gun set to low or medium is the recommended tool. Move the heat gun steadily along the tubing to avoid hot spots. Avoid open flames, as uneven heat can cause bubbling or uneven shrinkage. A standard hair dryer generally does not produce enough heat to fully activate PVC shrink tubing.

PVC heat shrink tubing provides a firm, conforming wrap that resists moderate vibration and abrasion once shrunk. It is generally suitable for battery pack wrapping, cable bundling, and wire organization in low-to-medium mechanical stress environments. For high-vibration or high-flex applications such as motorsport or industrial machinery, a polyolefin or adhesive-lined tubing may offer better long-term durability.

Standard PVC heat shrink tubing provides basic moisture resistance and is generally suitable for indoor and light outdoor use. It is not rated for continuous submersion or prolonged UV exposure. For outdoor installations exposed to rain, direct sunlight, or extreme temperature swings, consider adhesive-lined or UV-stabilized tubing for added protection and longevity.

PVC heat shrink tubing in this size range is typically rated for low-voltage applications, generally up to 600V AC in most standard grades. For specific voltage requirements in your project — particularly for high-voltage battery packs or industrial wiring — please contact us to confirm the rating of the batch you are ordering before purchase.

Measure the total length of the object or cable run you need to cover, then add 10–15% for overlap and trimming. For example, a single battery pack that is 200mm (≈7.9") long needs roughly 220–230mm of tubing per wrap. A 1-meter roll provides enough material for approximately 4–5 such wraps. For longer cable runs or batch production, the 10m (≈32.8 ft) or 20m (≈65.6 ft) options offer better value per meter.

Yes. The 91mm flat width is commonly used for wrapping multi-cell 18650 or 21700 battery packs assembled in parallel or series configurations. The tubing slides over the assembled pack and shrinks snugly when heat is applied, providing insulation and a clean finished appearance. Always verify your pack's cross-section dimensions before ordering to ensure the tubing will slide on without forcing.

Color is primarily cosmetic and does not affect the electrical or mechanical performance of the tubing. All color variants share the same PVC material and shrink characteristics. The Transparent option is particularly useful when you want to keep cell labels, capacity markings, or wiring configurations visible after wrapping — a practical choice for multi-pack workshop setups.