Large Diameter PVC Heat Shrink Tubing for Battery Packs & Cable Wraps — 242mm to 400mm

Measure the outer circumference of your battery pack or cable bundle, then divide by π (≈3.14) to get the required flat width. Generally, choose a flat width that is 5–15% larger than your measured value to allow easy insertion before shrinking. For example, a 150mm diameter cylinder typically fits inside the 242mm (Ø154mm) option. If you're between sizes, size up for easier installation.

This PVC heat shrink tubing has a typical 2:1 shrink ratio, meaning it shrinks to approximately half its original flat width when heat is applied. The Ø value listed (e.g., Ø154mm) is the recovered inner diameter after shrinking — this is the size your assembly needs to fit inside. The flat width (e.g., 242mm) is the tubing's size before heat is applied.

PVC heat shrink tubing generally provides good moisture resistance for indoor use and short-term outdoor exposure. It is not a fully waterproof seal on its own. For long-term outdoor installations, marine environments, or submersion applications, a dual-wall adhesive-lined heat shrink is generally recommended to achieve a watertight bond.

Yes — large diameter PVC heat shrink tubing is one of the most common finishing materials for 18650, 21700, and prismatic lithium-ion battery packs used in e-bikes, power tools, and solar storage systems. It provides electrical insulation and a clean, professional appearance. Always ensure the battery pack is fully assembled and at room temperature before applying heat.

PVC heat shrink tubing typically begins to shrink at around 70–90°C (158–194°F). A standard heat gun set to low or medium is the recommended tool. Move the heat gun slowly and evenly along the tubing to avoid hot spots. Avoid using open flames such as lighters or torches, as these can cause uneven shrinking, scorching, or damage to the material underneath.

Choose based on your project's total length requirement. 1M (≈39") is suitable for a single standard battery pack or a short cable run. 2M (≈79") works well for longer packs or when you need extra material for trimming and fitting. 3M (≈118") is ideal for large cable harnesses, multiple battery packs, or projects where you want material left over for future repairs.

The Blue (Thicken) variant has an increased wall thickness compared to the standard Blue option. This makes it a better choice for applications where extra mechanical protection, abrasion resistance, or a more rigid finished sleeve is needed — such as high-vibration environments or assemblies that will be handled frequently. Standard variants are generally sufficient for most battery wrapping and cable insulation applications.

No — color is purely aesthetic and does not affect the electrical insulation properties or shrink performance of the tubing. All color variants are made from the same PVC material. The Clear option is particularly useful when you need cell labels, serial numbers, or markings to remain visible through the finished wrap.