PVC Heat Shrink Tubing 145mm Wide – Battery Wrap & Wire Insulation Sleeve

Measure the total length of the battery pack or wire bundle you need to cover, then add at least 10–15% extra to account for shrinkage along the length axis. For example, a 100mm (≈3.9") battery pack would typically need 110–115mm of tubing before shrinking. Available lengths range from 1 Meter (≈39.4") to 10 Meter (≈393.7") — order the next size up if you're between lengths.

The 145mm flat width generally accommodates cylindrical battery packs with a circumference up to approximately 145mm before shrinking. This typically covers multi-cell 18650 or 21700 packs arranged in parallel rows. For the most accurate fit, measure your pack's circumference and confirm it is less than the flat width before ordering.

PVC heat shrink tubing of this type generally has a shrink ratio of approximately 2:1, meaning it can shrink to roughly half its original diameter when heat is applied. The length typically shortens by around 5–10% as well. Actual ratio may vary slightly by color and batch — contact us to confirm if your application requires a precise fit.

PVC heat shrink tubing is generally suited for indoor and moderate-environment use. It typically handles continuous service temperatures up to around 60–80°C (140–176°F). For high-heat environments, prolonged UV exposure, or applications requiring adhesive-lined sealing, a polyolefin or dual-wall alternative may be more appropriate. Contact us to confirm specifications for your specific use case.

A heat gun is the recommended tool for even, controlled shrinking across the full 145mm width. Keep the nozzle moving in a slow, sweeping motion to avoid hot spots. A lighter can work for very short sections, but may scorch the PVC if held in one spot. A hair dryer generally does not produce enough heat for reliable shrinking.

Yes. The wide 145mm flat width makes this tubing well-suited for bundling multi-wire harnesses, protecting cable runs in automotive or marine builds, and organizing wiring in DIY electronics projects. The multiple color options also allow color-coding of different circuits or functional zones within a build.

In most cases, color is achieved through pigment added to the same base PVC compound, so insulation properties are generally consistent across colors. The transparent option allows visual inspection of the underlying component — such as cell labels or solder joints — after shrinking. Contact us if your application has strict dielectric voltage requirements.