What is the shrink ratio and what does 2:1 mean?

A 2:1 shrink ratio means the tubing will shrink to approximately half its original diameter when heat is applied. For example, a tube with a 75mm flat width (≈47.7mm diameter) will recover to roughly 24mm in diameter. This ratio is suitable for most standard wire bundling and insulation tasks.

PVC Heat Shrink Tubing 2:1 Ratio – Flat Shrinkable Sleeve for Wire & Cable (75mm–95mm)

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PVC Heat Shrink Tubing 2:1 Ratio – Flat Shrinkable Sleeve for Wire & Cable (75mm–95mm)

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Size(mm): 75mm

Colour: Black

Length (Meter): 1 Meter

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$4.19 USD

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In stock (500 units), ready to be shipped

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PVC Heat Shrink Tubing 2:1 — Reliable Insulation & Cable Protection for Large-Diameter Wires

When you're working with thick wire bundles, large cable harnesses, or oversized conductors, standard small-bore heat shrink just won't cut it. Electricians, automotive technicians, marine riggers, and DIY enthusiasts who deal with large-gauge wiring know the frustration of finding tubing that actually fits — and stays put. This PVC heat shrink tubing is designed specifically for those larger applications, covering flat widths from 75mm (≈2.95") up to 95mm (≈3.74"), giving you the coverage you need without improvising.

Each order covers a continuous length of tubing — available in 1 Meter (≈3.3 ft), 3 Meter (≈9.8 ft), 5 Meter (≈16.4 ft), 10 Meter (≈32.8 ft), or 20 Meter (≈65.6 ft) — so you can cut exactly what you need and minimize waste. The tubing is made from flexible PVC with a 2:1 shrink ratio, meaning it recovers to approximately half its original diameter when heat is applied. Size options span 75mm, 78mm, 80mm, 83mm, 85mm, 91mm, and 95mm flat widths, and the tubing is available in 10 colors: Black, White, Green, Yellow, Blue, Red, Transparent, Light Green, Silver Gray, and Purple.

This large-bore heat shrink tubing is a go-to solution for automotive wiring harness protection, marine cable bundling, industrial conduit insulation, and workshop cable management. Whether you're color-coding circuits in a vehicle build, protecting exposed conductors in a boat's electrical system, or organizing a dense cable run in a control panel, the wide size range and color selection make it easy to find the right fit for your specific job.

ℹ️ Compatibility Note: This tubing is designed for use with standard heat guns. Flat width sizes range from 75mm to 95mm — verify your cable or bundle diameter before ordering. The 2:1 shrink ratio means the recovered diameter is approximately half the listed flat width.

✅ Key Features of These PVC Heat Shrink Tubes

🔥2:1 Shrink Ratio — Shrinks to approximately half its original diameter, providing a snug, conforming fit over large wire bundles and cable assemblies without excessive bulk.
📏Wide Size Range (75mm–95mm Flat Width) — Seven size options from 75mm to 95mm flat width cover a broad range of large-diameter cable bundling and insulation needs in a single product line.
🎨10 Color Options — Black, White, Green, Yellow, Blue, Red, Transparent, Light Green, Silver Gray, and Purple allow color-coded circuit identification and organization across complex wiring systems.
✂️Cut-to-Length Flexibility — Available in 1m, 3m, 5m, 10m, and 20m rolls so you can cut exactly the length needed for each application, reducing waste on large wiring harness projects.
⚡Electrical Insulation for Low-Voltage Circuits — PVC construction provides insulating protection suitable for low-voltage wire and cable insulation, helping prevent short circuits and abrasion damage.
🔧Flexible & Easy to Handle — Soft PVC material remains pliable before shrinking, making it straightforward to slide over connectors, terminals, and bundled cables even in tight spaces.

📐 Technical Specifications — PVC Heat Shrink Tubing

Material	PVC (Polyvinyl Chloride)
Shrink Ratio	2:1
Flat Width Options	75mm (≈2.95"), 78mm (≈3.07"), 80mm (≈3.15"), 83mm (≈3.27"), 85mm (≈3.35"), 91mm (≈3.58"), 95mm (≈3.74")
Available Lengths	1m (≈3.3 ft), 3m (≈9.8 ft), 5m (≈16.4 ft), 10m (≈32.8 ft), 20m (≈65.6 ft)
Color Options	Black, White, Green, Yellow, Blue, Red, Transparent, Light Green, Silver Gray, Purple
Shrink Temperature	Typically 70–120°C (158–248°F)
Voltage Rating	See variant options / Contact us to confirm
Application Method	Heat gun (recommended); avoid open flame
Typical Use	Wire bundling, cable insulation, harness protection, color-coding

⚠️ Sizing Tip: The flat width listed is the tubing's width when laid flat — not the diameter. The pre-shrink inner diameter is approximately flat width ÷ π. When in doubt, size up and confirm your bundle diameter before cutting.

❓ Frequently Asked Questions

How do I choose the right flat width size for my application?

The flat width listed (e.g., 75mm) is the tubing's width when laid flat. The pre-shrink inner diameter is approximately flat width ÷ π (so 75mm flat ≈ 23.9mm diameter). As a general rule, choose a flat width that is roughly 1.2–1.5× the diameter of the object you're covering. When in doubt, size up — you can always shrink tighter, but you can't stretch tubing that's too small.

What temperature is needed to shrink this tubing?

PVC heat shrink tubing typically requires temperatures in the range of 70–120°C (158–248°F). A heat gun set to low-to-medium heat works well. Apply heat evenly by moving the heat gun in a slow, sweeping motion. Avoid open flames, as they can scorch or melt PVC.

What does the 2:1 shrink ratio mean?

A 2:1 shrink ratio means the tubing will shrink to approximately half its original diameter when heat is applied. For example, a tube with a 75mm flat width will recover to roughly half that diameter. This ratio is suitable for most standard wire bundling and insulation tasks where a moderate amount of shrinkage is needed.

Is this PVC heat shrink tubing suitable for outdoor use?

PVC heat shrink tubing generally offers moderate resistance to moisture and UV exposure, making it suitable for light outdoor or semi-protected environments. For prolonged direct outdoor exposure or harsh weather conditions, a polyolefin or adhesive-lined heat shrink tubing is typically recommended for better long-term durability.

What voltage rating does this tubing support?

PVC heat shrink tubing in this size range generally provides electrical insulation suitable for low-voltage applications, typically up to 600V. For high-voltage or industrial-grade electrical insulation, please contact us to confirm the specific rating for the variant you need.

Can I use this tubing to bundle multiple wires together?

Yes. The large flat widths (75mm–95mm) make this tubing well-suited for bundling multiple wires or cables into a single, organized sleeve. It's commonly used in automotive wiring harnesses, marine cable management, and industrial cable bundling applications where a clean, protected finish is needed.

How do I cut the tubing to the length I need?

Simply use scissors or a utility knife to cut the tubing to your desired length before applying heat. Cut ends are clean and do not fray. For precision cuts on large-diameter tubing, a rotary cutter or sharp shears will give the cleanest result.

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

PVC Heat Shrink Tubing 2:1 Ratio – Flat Shrinkable Sleeve for Wire & Cable (75mm–95mm)

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Description

PVC Heat Shrink Tubing 2:1 — Reliable Insulation & Cable Protection for Large-Diameter Wires

✅ Key Features of These PVC Heat Shrink Tubes

📐 Technical Specifications — PVC Heat Shrink Tubing

❓ Frequently Asked Questions

PVC Heat Shrink Tubing 2:1 Ratio – Flat Shrinkable Sleeve for Wire & Cable (75mm–95mm)

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