2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm
2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm
2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm
2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm
2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm
2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm
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2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm

2:1 Heat Shrink Tubing Waterproof Wire Wrap — Black, ID 30–150mm

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Beschreibung

2:1 Heat Shrink Tubing — Waterproof Wire Protection for Large-Diameter Cables

When you're dealing with large cable bundles, exposed connector boots, or outdoor wiring runs, standard electrical tape just doesn't hold up. DIYers, electricians, and marine riggers who work with cables in the 30mm–150mm range know the frustration of finding heat shrink tubing that actually fits — and seals properly. This 2:1 ratio heat shrink tubing is built for exactly those jobs.

Each order covers your chosen inner diameter (ID 30mm / ≈1-3/16" up to 150mm / ≈5-29/32") and length (1, 2, 3, 5, or 10 meters), cut from a continuous black polyolefin sleeve. The 2:1 shrink ratio means the tubing recovers to half its listed diameter when heat is applied, creating a firm, moisture-resistant wrap around your cable or connector. Available in multiple sizes to match your exact project needs.

Typical use cases include automotive wiring harness protection, marine cable management for bilge pumps and navigation wiring, outdoor electrical conduit sealing, and large-gauge wire bundling in industrial or workshop settings — all scenarios where a durable, waterproof heat shrink sleeve for large cables is essential.

🔵 Compatibility Note: This tubing fits cables and connectors with an outer diameter smaller than the listed inner diameter. After shrinking (2:1 ratio), the recovered ID is approximately half the listed size. Confirm your cable OD before ordering — see the FAQ below for sizing guidance.

✅ Key Features of These 2:1 Heat Shrink Tubing Sleeves

  • 🔥True 2:1 Shrink Ratio — Recovers to half the listed inner diameter, delivering a snug, uniform fit over large-diameter wire bundles and cable connectors without gaps or loose ends.
  • 💧Waterproof Seal — Forms a moisture-resistant barrier once shrunk, making this waterproof heat shrink tubing suitable for outdoor, marine, and exposed electrical installations.
  • 📏Wide Size Range (ID 30–150mm) — Covers an unusually broad diameter range in one product line, from 30mm (≈1-3/16") up to 150mm (≈5-29/32"), accommodating everything from thick cable bundles to large conduit ends.
  • 🧱Polyolefin Construction — Made from flexible polyolefin material that resists oils, fuels, and abrasion after shrinking, maintaining its protective properties in demanding environments.
  • ✂️Sold by the Meter — Cut to Length — Order exactly 1, 2, 3, 5, or 10 meters so you only pay for what you need; no waste from oversized rolls when you just need a short run of large-bore heat shrink sleeve.
  • ⚡Electrical Insulation & Bundling — Provides reliable electrical insulation and mechanical protection for wire splices, connector boots, and cable harness wrap in automotive, marine, and DIY electrical projects.

📐 Technical Specifications — 2:1 Heat Shrink Tubing

Product Type Heat Shrink Tubing / Sleeve
Shrink Ratio 2:1
Color Black
Inner Diameter (Before Shrink) 30mm (≈1-3/16") / 35mm (≈1-3/8") / 40mm (≈1-9/16") / 45mm (≈1-3/4") / 50mm (≈1-31/32") / 60mm (≈2-3/8") / 70mm (≈2-3/4") / 80mm (≈3-1/8") / 90mm (≈3-17/32") / 100mm (≈3-15/16") / 120mm (≈4-23/32") / 150mm (≈5-29/32")
Recovered ID (After Shrink) Approximately half the listed inner diameter (e.g., 30mm recovers to ≈15mm)
Available Lengths 1m / 2m / 3m / 5m / 10m (sold per meter)
Material Polyolefin
Wall Thickness (Before Shrink) See variant options — varies by diameter
Shrink Temperature Typically 70°C–110°C (158°F–230°F)
Operating Temperature Range Contact us to confirm for your specific application
Waterproof Yes — moisture-resistant seal when fully shrunk
Voltage Rating Contact us to confirm
Application Wire bundling, cable protection, connector boots, harness wrap
Ships From US Warehouse
⚠️ Sizing Tip: Always measure your cable's outer diameter before ordering. Choose a heat shrink ID that is larger than your cable OD — the 2:1 ratio will bring it down to a firm fit. When in doubt, size up by one step.

❓ Frequently Asked Questions

How do I choose the right inner diameter for my wires?

Measure the outer diameter of your wire bundle or connector, then choose a heat shrink size that is typically 10–20% larger before shrinking. With a 2:1 shrink ratio, the tubing will recover to approximately half its listed inner diameter — so a 30mm tube recovers to roughly 15mm. When in doubt, size up; you can always apply more heat to achieve a tighter fit.

How much length do I need for my project?

Measure the total length of the area you need to cover, then add at least 10–15% extra to account for overlap at each end. A 1-meter length is generally sufficient for a single large cable splice or connector boot. For wiring harnesses or longer cable runs, the 3–10 meter options offer better value per meter.

What shrink temperature does this tubing require?

This tubing is designed to shrink at temperatures typically between 70°C–110°C (158°F–230°F). A standard heat gun set to low or medium is recommended. Avoid open flames, which can cause uneven shrinkage or scorching. Always work from one end toward the other for a uniform seal.

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

Yes. This tubing is designed with waterproof properties, making it suitable for outdoor electrical connections, marine wiring, and exposed cable runs. Once properly shrunk, it forms a snug seal that resists moisture ingress. For fully submerged applications, we recommend confirming suitability with our team before ordering.

What is the wall thickness and how strong is the tubing?

Wall thickness varies by diameter size — generally, larger diameter tubes have proportionally thicker walls. The tubing is made from polyolefin, which provides good tensile strength, abrasion resistance, and flexibility after shrinking. It is generally rated for light to medium mechanical protection in electrical and DIY applications. Contact us to confirm wall thickness for your specific size.

Can I use this tubing with both metric and imperial wire sizes?

Yes. The inner diameters listed (30mm–150mm) correspond to metric sizing, but the tubing works equally well over imperial-sized cables and conduits. For reference: 30mm ≈ 1-3/16" and 150mm ≈ 5-29/32". Select the size closest to — but larger than — your cable's outer diameter.

Is this tubing compatible with automotive and marine wiring?

Generally yes. Polyolefin heat shrink tubing is widely used in automotive wiring harnesses, marine cable management, and RV electrical systems. Its resistance to oils, fuels, and moisture makes it a practical choice for these environments. Always verify the specific voltage and temperature ratings match your application requirements before use.

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

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