3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving
3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving
3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving
3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving
3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving
3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving
3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving
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3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving

3.5mm Heat Shrink Tubing 2:1 Ratio — Electrical Wire Sleeving

HomeDIYer
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By HomeDIYer®

Price:
$1.70 USD
Stock:
In stock (500 units), ready to be shipped

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Description

3.5mm Heat Shrink Tubing 2:1 — Reliable Wire Insulation for Every Project

Loose wire splices, exposed terminals, and unprotected solder joints are a constant headache for electricians, automotive technicians, and DIY enthusiasts alike. One nick in the insulation can mean a short circuit, a failed inspection, or worse. This 3.5mm heat shrink tubing gives you a clean, professional-grade solution that seals and protects in seconds.

Each roll is made from flexible polyolefin with a 2:1 shrink ratio — meaning the 3.5mm (≈9/64") unshrunk inner diameter shrinks down to approximately 1.75mm (≈7/64") when heat is applied. Available in lengths from 1 meter (≈3.3 ft) up to 50 meters (≈164 ft), and in 7 colors: Black, White, Red, Green, Yellow, Blue, and Transparent.

Typical use cases include automotive wiring harness repair, home electrical projects, RC hobby builds, marine cable management, and workshop wire organization — anywhere you need a neat, insulated finish on spliced or terminated wires.

ℹ️ Compatibility: Fits wire gauges typically in the 18–22 AWG range. Suitable for standard polyolefin-compatible heat guns. Not designed for high-voltage industrial applications.

    ✅ Key Features of These 3.5mm Heat Shrink Tubing Rolls

  • 🔥2:1 Shrink Ratio — Shrinks from 3.5mm down to approximately 1.75mm, creating a snug, form-fitting sleeve around wire splices and terminals.
  • 🎨7 Color Options — Black, White, Red, Green, Yellow, Blue, and Transparent for easy circuit color-coding and wire identification in automotive and electrical wiring projects.
  • 📏Flexible Length Selection — Choose from 1m to 50m rolls so you only buy what you need, whether it's a single repair or a full workshop supply of heat shrink wire sleeving.
  • ⚡Polyolefin Material — Offers solid dielectric insulation, resistance to common oils and solvents, and flexibility across a wide temperature range for reliable electrical cable sleeving.
  • ✂️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-field wire repairs.
  • 🔧Versatile Application — Suitable for automotive wiring harness repair, hobby electronics, marine cable management, home electrical projects, and general-purpose wire bundling.

📐 Technical Specifications — 3.5mm 2:1 Heat Shrink Tubing

Product Type Heat Shrink Tubing
Shrink Ratio 2:1
Diameter (Unshrunk) 3.5mm (≈9/64")
Diameter (Shrunk) Approximately 1.75mm (≈7/64")
Material Polyolefin
Available Colors Black, White, Red, Green, Yellow, Blue, Transparent
Available Lengths 1m, 2m, 3m, 5m, 10m, 20m, 30m, 50m
Activation Temperature Typically 90°C (194°F) minimum
Full Shrink Temperature Typically 120°C (248°F)
Recommended Tool Heat gun (lighter acceptable for small areas)
Typical Wire Gauge Fit Generally 18–22 AWG (confirm with your wire bundle diameter)
Voltage Rating See variant options / Contact us to confirm for specific applications
Adhesive Lined No (standard single-wall tubing)
⚠️ Sizing tip: Always measure your wire or connector bundle diameter before ordering. The 3.5mm unshrunk ID should be slightly larger than your bundle for easy insertion. If in doubt, size up.

❓ Frequently Asked Questions

What diameter wire does 3.5mm heat shrink tubing fit?

This tubing has an unshrunk inner diameter of 3.5mm (≈9/64") and shrinks to approximately 1.75mm (≈7/64") at a 2:1 ratio. It typically fits wire gauges in the range of 18–22 AWG, though the exact fit depends on insulation thickness. Always measure your wire bundle before selecting a size.

What temperature is needed to shrink this tubing?

Standard 2:1 polyolefin heat shrink tubing generally activates at around 90°C (194°F) and fully shrinks at approximately 120°C (248°F). A heat gun is recommended for even, controlled shrinkage. A lighter can work in a pinch but may cause uneven results or scorching.

How strong is the insulation provided by this heat shrink tubing?

Polyolefin heat shrink tubing typically provides a dielectric strength of around 15–20 kV/mm, making it suitable for low-voltage electrical applications. It is not rated for high-voltage industrial use. Check your application's voltage requirements before use.

Can this heat shrink tubing be used outdoors?

Standard polyolefin heat shrink tubing generally offers good UV and moisture resistance for short-term outdoor exposure. For long-term outdoor or marine applications, an adhesive-lined (dual-wall) heat shrink tubing is generally recommended for a waterproof seal.

Is this tubing compatible with automotive wiring?

Yes, 3.5mm 2:1 polyolefin heat shrink tubing is commonly used in automotive wiring harness repair, connector insulation, and harness bundling. It is generally resistant to oils, fuels, and common automotive fluids in typical under-hood conditions.

How do I choose the right length to order?

Measure the total length of wire or connections you need to cover, then add 10–15% extra for trimming and overlap. For occasional repairs, a 1–3m roll is typically sufficient. For workshop or production use, 10–50m rolls offer better value per meter.

Does the color affect performance?

No — all color variants share the same 2:1 shrink ratio and polyolefin material properties. Color is used for wire identification and organization. Black is the most common for general use; other colors (Red, Blue, Green, Yellow, White, Transparent) are ideal for color-coding circuits.

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

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