PVC Heat Shrink Tubing for RC & 18650 Battery Packs — 7mm to 200mm, 7 Colors

Measure the outer diameter of your battery pack or cell bundle. Multiply that diameter by π (≈3.14) to get the circumference, then divide by 2 — that gives you the minimum flat width you need. Choose a flat width that is about 10–20% larger so the tube slides on easily before shrinking. For example, a single 18650 cell (≈18.5mm / ≈0.73" diameter) typically fits a 27mm–31mm flat-width tube. The inner diameter (Φ) listed in each variant is the approximate pre-shrink inner diameter.

PVC heat shrink tubing generally shrinks at temperatures between 90°C and 120°C (194°F–248°F). A heat gun set to low or medium is typically sufficient. Move the heat gun steadily along the tube to avoid hot spots. Avoid open flames, as they can scorch or melt the material unevenly.

This tubing has an approximate 2:1 shrink ratio, meaning it will shrink to roughly half its original inner diameter when fully heated. Always verify your pack's outer diameter against the listed inner diameter (Φ) before ordering to ensure a snug fit after shrinking.

PVC heat shrink tubing provides a degree of moisture resistance and is generally suitable for light outdoor use and splash protection. However, it does not form a fully waterproof hermetic seal. For applications requiring IP-rated waterproofing — such as marine or submersible use — consider adhesive-lined (dual-wall) heat shrink tubing instead.

This tubing is compatible with most common rechargeable battery types, including 18650 lithium-ion cells, LiPo packs, NiMH packs, and NiCd packs. It is also widely used for RC car, drone, e-bike, and power tool battery rebuilds. The PVC material is chemically inert with respect to standard battery electrolytes at normal operating temperatures.

Absolutely. PVC heat shrink tubing is commonly used for wire bundling, cable labeling, tool handle grips, strain relief, and general electrical insulation in electronics and DIY projects. The wide size range — 7mm to 200mm flat width — makes it suitable for everything from small signal wires to large cable harnesses in automotive, marine, and industrial settings.

No. All color variants share the same PVC material properties and approximate 2:1 shrink ratio. Color choice is purely for identification, aesthetics, or color-coding wiring systems. Clear tubing is particularly useful when you want to keep labels, cell markings, or printed text visible after wrapping.