7mm Heat Shrink Tubing 2:1 – Electrical Wire Sleeve & Cable Wrap

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7mm Heat Shrink Tubing 2:1 – Electrical Wire Sleeve & Cable Wrap

HomeDIYer

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By HomeDIYer®

Color: Black

Length: 1 Meter

Price:

$6.17 USD

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In stock (500 units), ready to be shipped

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7mm Heat Shrink Tubing 2:1 — Reliable Electrical Insulation for Every Wire Job

Whether you're chasing down a wiring fault in your car, tidying up a home electrical panel, or finishing off a custom electronics build, loose or exposed wire ends are a constant headache. Bare connections corrode, short out, and fail at the worst possible moment — and electrical tape just doesn't hold up over time. This 7mm heat shrink tubing gives hobbyists, auto technicians, and DIY builders a clean, durable solution that stays put.

Each order includes a continuous roll of polyolefin heat shrink tubing with a 2:1 shrink ratio — meaning the 7mm (≈9/32") pre-shrink diameter recovers to approximately 3.5mm (≈9/64") after heat is applied. Available in lengths from 1 meter (≈3.3 ft) up to 50 meters (≈164 ft), and in seven colors — Black, White, Red, Green, Yellow, Blue, and Transparent — so you can color-code circuits or match your build's aesthetic.

Typical use cases include automotive wiring harness repairs, marine and RV electrical connections, speaker wire terminations, and DIY electronics projects where a clean insulated finish is needed. The transparent option is especially useful for heat shrink wire labeling and color-coded cable identification.

🔌 Compatibility: Fits cables and wire bundles with an outer diameter of approximately 3.5mm–6.5mm (before shrinking). Verify your cable OD before ordering. Compatible with standard heat guns, soldering station hot-air tools, and similar heat sources.

✅ Key Features of These 7mm 2:1 Heat Shrink Tubes

🔥2:1 Shrink Ratio — Shrinks from 7mm down to approximately 3.5mm, creating a snug, form-fitting sleeve over wires and cable bundles in that recovered diameter range.
🎨7 Color Options — Black, White, Red, Green, Yellow, Blue, and Transparent allow color-coded wire identification and circuit organization across complex wiring harnesses.
📏Flexible Length Selection — Choose from 1m, 5m, 10m, 20m, 30m, or 50m rolls so you only buy what your project actually needs, from a single connector repair to a full vehicle rewire.
⚡Electrical Insulation — Polyolefin construction provides dielectric insulation to protect splices, terminals, and solder joints from short circuits and accidental contact.
💧Moisture Resistance — The recovered sleeve resists moisture ingress, helping protect connections in engine bays, under-dash areas, and other environments where condensation is a concern.
✂️Easy to Cut and Apply — Cuts cleanly with scissors or a utility knife; shrinks evenly with a standard heat gun, making it practical for both bench work and in-vehicle electrical repairs.

📐 Technical Specifications — 7mm 2:1 Heat Shrink Tubing

Expanded Diameter	7mm (≈9/32")
Recovered Diameter	Approximately 3.5mm (≈9/64") after full shrink
Shrink Ratio	2:1
Material	Polyolefin
Available Colors	Black, White, Red, Green, Yellow, Blue, Transparent
Available Lengths	1m (≈3.3 ft), 5m (≈16.4 ft), 10m (≈32.8 ft), 20m (≈65.6 ft), 30m (≈98.4 ft), 50m (≈164 ft)
Typical Activation Temperature	Approximately 70–120°C (158–248°F) — See variant options
Wall Thickness (recovered)	See variant options
Voltage Rating	Contact us to confirm for your specific application
Compliance	Generally RoHS compliant — Contact us to confirm
Recommended Tool	Heat gun (low to medium setting)

⚠️ Sizing tip: Always measure your cable's outer diameter before ordering. The tubing should slide over the cable freely before heat is applied. If your cable OD is close to 7mm, consider sizing up.

❓ Frequently Asked Questions

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

Measure the total cable run you need to cover and add 10–15% for overlap and trimming. For a single connector repair, 1 meter is typically more than enough. For wiring a full vehicle or panel, 10–30 meters is generally recommended. Bulk rolls (20–50m) offer the best value for ongoing projects.

What does 2:1 shrink ratio mean?

A 2:1 shrink ratio means the tubing shrinks to half its original diameter when heat is applied. This 7mm tubing will shrink down to approximately 3.5mm, making it suitable for wires and cables in that recovered size range.

What wire sizes does 7mm heat shrink tubing fit?

7mm (before shrinking) generally fits wire bundles or cables with an outer diameter between approximately 3.5mm and 6.5mm. Always measure your cable's outer diameter before selecting a size — the tubing should slide over the cable easily before shrinking.

Can this heat shrink tubing be used outdoors?

This tubing provides electrical insulation and moisture resistance suitable for general indoor and sheltered outdoor use. For fully exposed outdoor or marine environments with prolonged UV exposure, an adhesive-lined or UV-stabilized variant is generally recommended.

What temperature is needed to shrink this tubing?

Standard polyolefin heat shrink 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 set to low or medium is the most controlled method. A lighter can work in a pinch but risks uneven shrinking or scorching.

Is this tubing RoHS compliant and safe for automotive use?

Polyolefin heat shrink tubing of this type is generally RoHS compliant and widely used in automotive wiring harnesses, marine electronics, and DIY electrical repairs. If your application requires a specific certification, please contact us to confirm.

Can I cut the tubing to custom lengths?

Yes. The tubing can be cut cleanly with scissors or a utility knife to any length you need. Bulk rolls (5m, 10m, 20m, 30m, 50m) are ideal when you need multiple custom-cut pieces for a larger project.

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