Large Diameter Heat Shrink Tubing — Protect and Rewrap Your RC Battery Packs
If you've ever dealt with a cracked, peeling, or damaged battery pack wrapper on your RC car, drone, or boat, you know how quickly exposed cells can become a safety hazard. This large diameter heat shrink tubing is built for hobbyists, RC builders, and DIY electronics enthusiasts who need a reliable, clean-looking sleeve to rewrap or protect battery packs of varying sizes — without the mess of tape or the cost of a replacement pack.
Each order includes 1 meter (≈39.4") of heat shrink tubing in your chosen diameter and color. Available sizes range from 14mm (≈0.55") flat width up to 40mm (≈1.57") flat width, in both red and black. The tubing is designed with a 2:1 shrink ratio, recovering tightly around your pack when heat is applied. Exact recovered diameter depends on pack geometry — see the size selection guide in the FAQ below.
Typical use cases include rewrapping LiPo and NiMH RC battery packs after cell replacement, bundling and insulating large wire harnesses in automotive or marine DIY projects, and adding a protective grip sleeve to tool handles or tubing assemblies. Whether you're searching for RC battery pack heat shrink wrap, large diameter shrink tubing for LiPo packs, or a PVC battery sleeve replacement, this tubing covers the most common RC pack sizes in one product line.
🔋
Compatibility: Designed for RC battery packs (LiPo, NiMH, Li-Ion). Also suitable for large cable bundles, tool handles, and DIY electrical insulation projects. Select your diameter based on your pack's outer circumference — see FAQ for sizing guidance.
✅ Key Features of These Large Diameter RC Battery Heat Shrink Sleeves
-
📏Wide Size Range — Available in five diameters from 14mm (≈0.55") to 40mm (≈1.57") flat width, covering the most common RC battery pack sizes from small 2S packs to large 6S configurations.
-
🔥2:1 Shrink Ratio — Applies evenly with a heat gun to form a tight, conforming wrap around your battery pack, reducing movement and protecting cell surfaces from abrasion and moisture.
-
⚡Electrical Insulation — Provides a dielectric barrier between the cell surface and external contacts, reducing the risk of shorts during handling, storage, or use in your RC vehicle.
-
✂️Cut-to-Length Convenience — Each piece is 1 meter (≈39.4") long, giving you enough material to wrap most standard RC battery packs with room to trim for a clean, professional finish.
-
🎨Red and Black Color Options — Easily distinguish battery polarity orientation or match your build's color scheme. Consistent color throughout the material, not a surface coating.
-
🛡️Abrasion and Impact Protection — The shrunk sleeve adds a layer of physical protection against scrapes, vibration wear, and minor impacts — extending the usable life of your battery pack wrapping between rebuilds.
📐 Technical Specifications — Large Diameter Heat Shrink Tubing
| Available Flat Widths |
14mm (≈0.55"), 20mm (≈0.79"), 25mm (≈0.98"), 30mm (≈1.18"), 40mm (≈1.57") |
| Length per Piece |
1 meter (≈39.4") |
| Shrink Ratio |
Typically 2:1 |
| Colors Available |
Red, Black |
| Material |
Typically PVC or polyolefin (see variant options) |
| Shrink Temperature |
Typically 70–120°C (158–248°F) — use a heat gun for best results |
| Longitudinal Shrinkage |
Generally <10% in length |
| Recommended Application Tool |
Heat gun (hair dryer may work for 14mm–20mm sizes) |
| Typical Use |
RC battery pack rewrapping, cable bundling, tool handle grips, DIY electrical insulation |
| Quantity per Order |
1 meter per variant selected |
| Voltage Rating |
Contact us to confirm |
⚠️
Sizing Note: Flat width is the measurement of the tubing lying flat before shrinking. To find the right size, measure your battery pack's outer circumference and divide by 2 — choose the next size up from that result. When in doubt, size up; tubing that is slightly too large will still shrink down, while tubing that is too small cannot be forced over the pack.
❓ Frequently Asked Questions
How do I choose the right diameter for my battery pack?
Measure the circumference of your battery pack and divide by π (3.14) to get the flat diameter. Choose a tubing size that is slightly larger than that measurement. For example, a pack that measures roughly 44mm (≈1.73") across would typically fit well inside the 25mm flat-width tubing, which expands to cover packs up to approximately 50mm in diameter before shrinking. When in doubt, size up — it's easier to work with a slightly oversized sleeve than one that won't slide over the pack.
What shrink ratio does this tubing use?
This heat shrink tubing generally uses a 2:1 shrink ratio, meaning it shrinks to approximately half its original diameter when heat is applied. Always verify the final recovered diameter fits your pack before committing to a full wrap. Apply heat gradually and evenly, starting from one end and working toward the other.
Can I use this tubing outdoors or in wet environments?
This tubing is typically made from PVC or polyolefin material that provides basic moisture resistance once fully shrunk. It is not rated as waterproof or submersible. For outdoor RC use in light rain or humidity, it generally performs well. For underwater or fully submerged applications, additional sealing (such as adhesive-lined heat shrink or conformal coating) is recommended.
What tools do I need to apply the heat shrink tubing?
A heat gun is the most reliable tool for large-diameter tubing. A standard hair dryer may work for the 14mm and 20mm sizes but often lacks the concentrated heat needed for 30mm–40mm sleeves. Avoid open flames, which can scorch or unevenly shrink the material and may damage the battery cells underneath.
Is this tubing compatible with LiPo, NiMH, and Li-Ion battery packs?
Yes. This tubing is designed as a universal sleeve for RC battery packs and is generally compatible with LiPo, NiMH, and Li-Ion cell configurations. It provides insulation and physical protection regardless of battery chemistry. It does not replace proper battery management systems or cell-level protection circuits.
How much does the tubing shrink in length when heat is applied?
Longitudinal shrinkage is typically minimal — generally less than 5–10% in length — so a 1-meter (≈39.4") piece will remain close to its original length after shrinking. As a best practice, cut your sleeve slightly longer than your battery pack to account for any length reduction and to allow for clean end trimming after shrinking.
Can I use this for applications other than RC battery packs?
Absolutely. While optimized for RC battery pack wrapping, this large-diameter heat shrink tubing is also commonly used for cable bundling, tool handle grips, pipe insulation, and DIY electrical projects requiring a clean, protective sleeve over large-diameter objects. The 40mm size in particular is useful for bundling thick wire looms in automotive or marine builds.
🛒 Select your size and color above, then add to cart — ships from our US warehouse.
