Heat Shrink Tubing 2:1 — Reliable Weatherproof Protection for φ11mm, φ12mm & φ13mm Cables
Exposed wire connections are a liability — whether you're finishing an automotive wiring harness, sealing outdoor electrical joints, or tidying up a DIY electronics project, bare splices invite corrosion, shorts, and failure. This heat shrink tubing 2:1 ratio sleeving gives electricians, hobbyists, and tradespeople a clean, durable solution that goes on fast and stays put.
Each roll is made from flexible polyolefin material and is available in three pre-shrink inner diameters — φ11mm (≈7/16"), φ12mm (≈15/32"), and φ13mm (≈1/2") — across seven colors: Black, White, Red, Green, Yellow, Blue, and Clear. Choose from 1m up to 50m per order to match your project scale. The 2:1 shrink ratio means each size shrinks to approximately half its original diameter under heat, forming a tight, weatherproof sleeve.
Typical use cases include automotive wire bundling and connector sealing, marine and outdoor electrical junction protection, home electrical panel wire labeling and organization, and DIY electronics repair where color-coded cable sleeving for wire management keeps builds readable and professional.
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Compatibility: Fits cables, butt connectors, ring terminals, and wire bundles with an outer diameter up to approximately 9mm (φ11mm), 10mm (φ12mm), or 11mm (φ13mm) pre-shrink. Works with both metric and imperial wire gauges. Contact us to confirm fit for specific connector types.
✅ Key Features of These Heat Shrink Tubing Sleeves
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🔥2:1 Shrink Ratio — Shrinks to approximately half its pre-shrink diameter, creating a firm, gap-free grip around cables and connectors for secure insulation.
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🌧️Weatherproof Construction — Polyolefin material resists moisture, dust, and mild UV exposure, making this weatherproof cable sleeving suitable for outdoor and automotive environments.
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🎨7 Color Options — Black, White, Red, Green, Yellow, Blue, and Clear allow color-coded wire identification across complex wiring harnesses and multi-circuit installations.
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📏3 Diameter Sizes — φ11mm, φ12mm, and φ13mm cover a practical range of cable bundles and connectors, reducing the need to stock multiple product lines.
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🔄Flexible & Kink-Resistant — Remains pliable after shrinking, so it bends with cables without cracking — important for automotive and marine applications where vibration is a factor.
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📦Bulk Length Options — Available from 1m to 50m per roll, so you can order exactly what you need for a single repair or stock up for ongoing electrical work and production runs.
📐 Technical Specifications — Heat Shrink Tubing 2:1 Polyolefin Sleeving
| Product Type |
Heat Shrink Tubing |
| Shrink Ratio |
2:1 |
| Available Diameters (Pre-Shrink) |
φ11mm (≈7/16"), φ12mm (≈15/32"), φ13mm (≈1/2") |
| Approximate Post-Shrink Diameter |
~5.5mm / ~6mm / ~6.5mm (varies by cable OD) |
| Material |
Polyolefin (typically) |
| Colors Available |
Black, White, Red, Green, Yellow, Blue, Clear |
| Available Lengths |
1m, 2m, 3m, 5m, 10m, 25m, 50m |
| Activation Temperature |
Typically ~90°C (194°F); full shrink at ~120°C (248°F) |
| Recommended Tool |
Heat gun (open flame not recommended) |
| Weatherproof / Moisture Resistant |
Yes — suitable for outdoor and automotive use |
| Wall Thickness (Post-Shrink) |
See variant options |
| Voltage Rating |
Contact us to confirm |
| Operating Temperature Range |
Contact us to confirm |
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Note: Voltage rating and exact wall thickness vary by batch. If your application requires certified electrical ratings, please contact us before ordering to confirm specifications.
❓ Frequently Asked Questions
How do I choose the right diameter of heat shrink tubing?
Measure the outer diameter of the cable or connector you need to cover. Choose a tubing size whose pre-shrink inner diameter is larger than your cable — typically by 20–30% — so it slides on easily. For example, φ11mm (≈7/16" pre-shrink) generally suits cables up to about 9mm in diameter. After shrinking at 2:1 ratio, the tubing will grip tightly around the cable.
What does 2:1 shrink ratio mean?
A 2:1 shrink ratio means the tubing will shrink to approximately half its original inner diameter when heat is applied. For example, φ12mm tubing will shrink down to roughly 6mm, creating a snug, protective sleeve around your cable or connector.
Can this heat shrink tubing be used outdoors or in wet environments?
Yes. This tubing is designed to be weatherproof once properly shrunk. It generally provides resistance to moisture, dust, and mild UV exposure, making it suitable for outdoor wiring, marine connections, and automotive applications. For submersion or extreme environments, confirm suitability with us before ordering.
What temperature is needed to shrink this tubing?
Standard polyolefin heat shrink tubing typically activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is the recommended tool. Avoid open flames, which can cause uneven shrinkage or scorching.
Is this tubing compatible with standard wire gauges and connectors?
Yes. The φ11mm, φ12mm, and φ13mm sizes are generally compatible with multi-conductor cables, butt connectors, ring terminals, and wire bundles in those diameter ranges. They work with both metric and imperial wire gauges — contact us to confirm fit for specific connector types.
How do I choose the right length for my project?
We offer lengths from 1 meter up to 50 meters. For small repairs or single connections, 1–3 meters is typically sufficient. For wiring harnesses, automotive builds, or bulk projects, the 10m, 25m, or 50m rolls offer better value per meter. Cut to length as needed — the tubing stores well when kept dry and away from heat.
Does the color affect performance?
No — all seven colors (Black, White, Red, Green, Yellow, Blue, Clear) share the same 2:1 shrink ratio and weatherproof properties. Color is primarily used for wire identification and organization. Clear tubing is useful when you need to see the underlying wire or label.
🛒 Select your size, color, and length above, then add to cart — ships from our US warehouse.
