Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths
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Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & LengthsHeat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths

Heat Shrink Tubing 3:1 Ratio — 0.8mm to 40mm, Multiple Colors & Lengths

HomeDIYer
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By HomeDIYer®

Price:
$3.07 USD
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In stock (500 units), ready to be shipped

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Description

Heat Shrink Tubing 3:1 — Reliable Electrical Insulation from 0.8mm to 40mm

Loose wire splices, exposed terminals, and unprotected connectors are a constant headache for electricians, automotive technicians, and DIY builders alike. One nick in the insulation can mean a short circuit, a failed inspection, or a fire hazard. This heat shrink tubing 3:1 ratio sleeving gives hobbyists, tradespeople, and repair shops a fast, clean way to seal and protect any wire or cable connection — no tape, no mess, no guesswork.

Each order is sold by the meter in a single continuous length — choose 1 Meter (≈39.4"), 2 Meter (≈78.7"), or 5 Meter (≈196.9") — and in diameters ranging from 0.8mm (≈1/32") up to 40mm (≈1-9/16"). The tubing is available in six colors: Black, White, Red, Blue, Yellow, and Grey. The 3:1 shrink ratio means the tubing recovers to approximately one-third of its supplied diameter, conforming tightly around irregular shapes and stepped connectors that standard 2:1 tubing cannot grip.

Typical use cases include automotive wire harness repair and color-coded circuit identification, marine and outdoor electrical connections where moisture resistance matters, and electronics bench work such as protecting solder joints on PCB leads, battery packs, and sensor cables. The wide diameter range also makes this electrical sleeving cable wire heatshrink tube a go-to for covering large lugs, busbars, and hydraulic hose fittings.

ℹ️ Compatibility note: Supplied diameter must be larger than the object being covered so the tubing slides on before shrinking. The recovered diameter is typically ⅓ of the supplied size. If you are unsure which size fits your wire gauge or connector, contact us before ordering.

✅ Key Features of These Heat Shrink Tubing 3:1 Sleeves

  • 🔥True 3:1 Shrink Ratio — Recovers to approximately one-third of its supplied diameter, providing a tighter, more conforming fit than standard 2:1 electrical sleeving for stepped connectors and irregular profiles.
  • 📏Wide Diameter Range — Available from 0.8mm up to 40mm supplied diameter, covering everything from fine signal wires to large power cables and multi-pin automotive connectors in a single product line.
  • 🎨Six Color Options — Black, White, Red, Blue, Yellow, and Grey allow color-coded circuit identification in automotive wiring, panel builds, and multi-circuit installations without any additional labeling.
  • 📐Flexible Length Selection — Order 1m, 2m, or 5m per variant so you can stock exactly what your project needs; the 5m option is cost-effective for high-volume wire harness repair work.
  • 🛡️Moisture-Resistant Seal — Once fully shrunk, the tubing forms a snug barrier against moisture and dust, making it suitable for outdoor electrical connections and marine wiring applications.
  • ✂️Easy to Cut and Apply — Cuts cleanly with scissors or a utility knife; shrinks with a standard heat gun at typically 120°C (248°F) without requiring specialized tools or adhesives.

📐 Technical Specifications — Heat Shrink Tubing 3:1

Product Type Polyolefin Heat Shrink Tubing
Shrink Ratio 3:1
Supplied Diameter Range 0.8mm (≈1/32") — 40mm (≈1-9/16")
Available Colors Black, White, Red, Blue, Yellow, Grey
Available Lengths 1 Meter (≈39.4"), 2 Meter (≈78.7"), 5 Meter (≈196.9")
Shrink Temperature Typically begins at ~70–90°C (158–194°F); full recovery at ~120°C (248°F)
Recovered Diameter Approximately ⅓ of supplied diameter (see variant options)
Wall Thickness (recovered) See variant options
Operating Temperature Range Contact us to confirm
Voltage Rating Contact us to confirm
Application Method Heat gun (recommended); avoid open flame
Sold As Continuous length per meter (cut to size)
⚠️ Sizing tip: Always verify the supplied diameter is larger than your wire or connector before ordering. The recovered (shrunk) diameter is typically one-third of the supplied size. When in doubt, size up one step.

❓ Frequently Asked Questions

How do I choose the right diameter of heat shrink tubing?

Measure the outer diameter of the wire or connector you need to cover, then choose a tubing size whose recovered (shrunk) diameter is slightly smaller than that measurement. Because this tubing has a 3:1 shrink ratio, the recovered diameter is typically one-third of the supplied diameter. For example, a 6mm (≈1/4") supplied tube generally recovers to about 2mm (≈5/64"). When in doubt, size up one step to allow easy insertion before shrinking.

What does a 3:1 shrink ratio mean?

A 3:1 shrink ratio means the tubing will shrink to approximately one-third of its original supplied diameter when heat is applied. This is generally double the shrinkage of standard 2:1 tubing, making it well-suited for irregular shapes, connectors, and applications where a tighter, more conforming fit is needed — such as stepped terminals or multi-conductor bundles.

What temperature is needed to shrink this tubing?

This tubing typically begins to shrink at around 70–90°C (158–194°F) and fully recovers at approximately 120°C (248°F). A heat gun is the recommended tool — move it slowly and evenly along the tubing to avoid hot spots. Avoid open flames, which can scorch or burn the tubing unevenly.

Is this heat shrink tubing waterproof or suitable for outdoor use?

Once fully shrunk, the tubing generally provides a snug, moisture-resistant seal around the covered surface, making it suitable for many outdoor electrical connections and marine wiring applications. For fully waterproof or submersion-rated applications, contact us to confirm the specific variant meets your requirements before ordering.

What wire gauges or connector types is this compatible with?

The range of supplied diameters (0.8mm to 40mm) covers wire gauges from very fine signal wires up to large power cables and multi-pin connectors. In most cases, the supplied diameter should be larger than the object being covered so the tubing slides on easily before shrinking. Contact us if you need help matching a specific AWG gauge or connector body size.

Can I cut the tubing to a custom length before shrinking?

Yes. The tubing can be cut to any length with scissors or a utility knife before applying heat. Cut cleanly and squarely to avoid fraying at the ends. The 1m, 2m, and 5m length options let you stock the right amount for your project without waste — the 5m roll is particularly cost-effective for wire harness repair work.

Does the color affect performance?

No — the color options (Black, White, Red, Blue, Yellow, Grey) are purely for identification and organization purposes. All colors share the same 3:1 shrink ratio and electrical insulation properties. Color-coding is commonly used in automotive wiring, panel builds, and multi-circuit installations to distinguish circuits at a glance without additional labeling.

🛒 Select your diameter, color, and length above, then add to cart — ships from our US warehouse.

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