180mm Flat Width PVC Heat Shrink Tubing for Battery Packs — Insulation Sleeve

Measure the total length of your battery assembly, then add at least 10–15% for overlap and shrinkage allowance. For example, a 200mm (≈7.9") pack would typically need a 230–240mm cut length. Since this tubing is sold by the meter, order the next size up if you're between lengths — leftover material stores flat and is easy to reuse on future builds.

This PVC heat shrink tubing generally has a 2:1 shrink ratio, meaning the 180mm flat width recovers to approximately 90mm in diameter (≈3.5") after full shrinkage. To check fit before ordering, measure the circumference of your battery pack and divide by π (≈3.14) to get the diameter — it should be less than the recovered diameter. If you're unsure, contact us with your pack dimensions.

PVC heat shrink tubing of this type is generally rated for low-voltage insulation, typically up to 600V, and provides a reliable barrier against accidental contact between cell terminals and conductive surfaces. It is not a substitute for a proper BMS or fusing system, but it significantly reduces the risk of shorts caused by physical contact during handling, transport, or installation.

PVC offers good moisture resistance for indoor and semi-protected environments such as garage workshops, enclosed e-bike battery compartments, and indoor power walls. For prolonged outdoor exposure, UV radiation, or submersion, an adhesive-lined polyolefin or marine-grade heat shrink is generally a better choice. This product is best suited for protected indoor and semi-outdoor battery applications.

Yes. The 180mm flat width is commonly used to sleeve large rectangular LiFePO4 prismatic modules and multi-cell 18650 or 21700 packs used in e-bike, solar storage, and DIY power wall builds. Always verify that your pack's circumference is less than the tubing's recovered inner circumference (approximately 180mm × 2 = 360mm circumference) before applying heat.

A heat gun is the recommended tool — set it to a low-to-medium heat setting and move it steadily along the tubing to shrink evenly without scorching. Keep the gun moving and work from the center outward to avoid trapping air bubbles. A hair dryer on its highest setting may work in a pinch for thin-walled PVC, but a heat gun gives more consistent, professional results. Avoid open flames, which can cause uneven shrinkage or discoloration.

Color is typically a functional choice: Black is the most common for battery packs and general electrical insulation. Transparent lets you see cell labels, markings, or spot-weld strips underneath the sleeve. Red and Yellow are often used for positive polarity identification or high-visibility warning. Blue is popular for negative rails or secondary circuits. Fruit Green and Silver Grey are frequently chosen for custom e-bike and RC battery builds where aesthetics matter.