Purple PVC Heat Shrink Tubing for RC Battery Pack, LED & Pin Connectors — 23mm to 43mm Flat

Measure the outer diameter of the object you want to cover, then select a variant whose recovered inner diameter (Ø) is slightly larger. For example, the 23mm flat size recovers to approximately Ø14.6mm — suitable for components up to about 14mm in diameter. As a general rule, choose a flat width that gives you 20–30% clearance over the object's diameter to ensure the tubing slides on easily before shrinking.

Quick reference: 23mm flat → Ø14.6mm recovered | 27mm flat → Ø17.2mm | 29.5mm flat → Ø18.8mm | 43mm flat → Ø27.4mm.

This tubing generally has a 2:1 shrink ratio, meaning it shrinks to approximately half its original flat width when heat is applied. The recovered inner diameters shown in the variant names reflect this ratio. Actual shrinkage may vary slightly depending on heat application method and duration.

PVC heat shrink tubing generally provides basic moisture resistance suitable for light indoor and semi-protected outdoor use — for example, an RC car running on a dry track or a garden lighting installation under a covered area. For fully waterproof or submersion applications, a dual-wall adhesive-lined heat shrink is typically recommended instead.

Yes. The available flat sizes (23mm to 43mm) cover the outer dimensions of many common LiPo and NiMH RC battery pack form factors. Always verify the recovered inner diameter (Ø) matches your specific battery pack's width and thickness before ordering. If you're unsure, contact us with your battery dimensions and we'll help you select the right size.

PVC heat shrink tubing typically activates at around 70–90°C (158–194°F). A heat gun set to low or medium is the most reliable method, as it allows even, controlled heat distribution. Avoid open flames — they can cause uneven shrinkage, scorching, or damage to nearby components. Move the heat gun steadily along the tubing rather than holding it in one spot.

For a single battery pack replacement or a small connector repair, 1m is generally sufficient. For ongoing workshop use, wiring harness projects, or bulk LED installations, the 5m, 20m, or 100m rolls offer better value per meter. We recommend ordering a 1m roll first to confirm the size fits your application before committing to a larger quantity.

Yes. The 23mm and 27mm flat sizes are well-suited for bundling LED strip wiring, covering solder joints, and insulating pin connector terminations. The purple color also makes it easy to identify specific circuits in multi-wire setups — useful when working with RGB LED controllers, ESCs, or servo harnesses where multiple wire colors are already in use.