Black Silicone Rubber Heat Shrink Tubing — 0.8mm to 40mm Diameter, 200°C Rated
Black Silicone Rubber Heat Shrink Tubing — 0.8mm to 40mm Diameter, 200°C Rated
Black Silicone Rubber Heat Shrink Tubing — 0.8mm to 40mm Diameter, 200°C Rated
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Black Silicone Rubber Heat Shrink Tubing — 0.8mm to 40mm Diameter, 200°C RatedBlack Silicone Rubber Heat Shrink Tubing — 0.8mm to 40mm Diameter, 200°C RatedBlack Silicone Rubber Heat Shrink Tubing — 0.8mm to 40mm Diameter, 200°C Rated

Black Silicone Rubber Heat Shrink Tubing — 0.8mm to 40mm Diameter, 200°C Rated

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Beschreibung

Silicone Rubber Heat Shrink Tubing — Flexible, High-Temp Cable Protection from 0.8mm to 40mm

Electricians, automotive technicians, and electronics hobbyists know the frustration of insulation that cracks under heat, stiffens in the cold, or fails outdoors. Whether you're protecting wiring harnesses in an engine bay, bundling cables in a control panel, or finishing off a DIY electronics project, you need a cable sleeve that holds up under real-world conditions — not just in a lab.

This black silicone rubber heat shrink tubing is available in diameters ranging from 0.8mm (≈0.031") to 40mm (≈1.575"), with lengths of 1M (≈3.3 ft), 2M (≈6.6 ft), 3M (≈9.8 ft), 5M (≈16.4 ft), and 10M (≈32.8 ft) per piece. The silicone rubber construction delivers a continuous operating temperature rating of 200°C (392°F), combined with excellent flexibility even at sub-zero temperatures. Each piece is a single continuous length of tubing — no joints or seams.

Typical use cases include automotive wiring harness repair and protection, high-temperature wire bundling near exhaust or engine components, marine and outdoor electrical cable sleeving, and insulating soldered joints or terminal connections in industrial control systems. The flexible silicone heat shrink tubing for automotive wiring is especially popular for under-hood applications where standard PVC tubing would soften or crack.

🔌 Compatible with standard heat guns. Fits wire gauges from fine signal wires up to large power cables — select your diameter based on the outer diameter of your wire or bundle before shrinking.

✅ Key Features of These Silicone Rubber Heat Shrink Tubes

  • 🌡️200°C Continuous Rating — Withstands sustained high-heat environments including engine bays, industrial machinery, and lighting fixtures where standard PVC heat shrink would fail.
  • 🧲Stays Flexible After Shrinking — Silicone rubber remains pliable at temperatures as low as approximately -60°C, making this high-temperature silicone cable sleeve suitable for both extreme cold and heat.
  • 🛡️Flame-Retardant Construction — Self-extinguishing silicone material does not support combustion, providing an added layer of safety for electrical insulation in enclosed or safety-critical installations.
  • 💧Moisture & UV Resistant — Silicone rubber resists water ingress, humidity, and UV degradation, making this outdoor-rated heat shrink tubing a reliable choice for marine, automotive, and exterior wiring runs.
  • 📏Wide Diameter Range (0.8mm–40mm) — One product line covers fine signal wires through large power cables, eliminating the need to source multiple products for a single wiring project.
  • ✂️Cut-to-Length Flexibility — Available in 1M to 10M continuous lengths so you can cut exactly what you need for each connection, reducing waste on large wiring harness jobs.

📐 Technical Specifications — Silicone Rubber Heat Shrink Tubing

Material Silicone Rubber
Color Black
Pre-Shrink Diameter Range 0.8mm (≈0.031") — 40mm (≈1.575")
Available Lengths 1M (≈3.3 ft), 2M (≈6.6 ft), 3M (≈9.8 ft), 5M (≈16.4 ft), 10M (≈32.8 ft)
Max Continuous Operating Temp 200°C (392°F)
Low-Temp Flexibility Typically down to -60°C (-76°F)
Shrink Ratio Typically 2:1 — see variant options to confirm
Flame Rating Flame-retardant / self-extinguishing
Wall Thickness (post-shrink) See variant options
Voltage Rating Contact us to confirm
Application Method Heat gun recommended
Sold As Single continuous length per unit
⚠️ Diameter listed is the pre-shrink inner diameter. Always measure your wire or bundle's outer diameter and select a tubing size that is at least 20–30% larger to ensure easy installation before shrinking.

❓ Frequently Asked Questions

How do I choose the right diameter for my wires?

Measure the outer diameter of the wire or bundle before shrinking. The tubing's pre-shrink inner diameter should be at least 20–30% larger than your wire diameter to allow easy insertion. After heat is applied, the tubing shrinks down to grip the wire firmly. For example, a 4mm wire would typically work well with a 6mm pre-shrink diameter.

What shrink ratio does this silicone heat shrink tubing have?

Silicone rubber heat shrink tubing generally has a 2:1 shrink ratio, meaning it shrinks to approximately half its original inner diameter when heat is applied. Please confirm the exact ratio for your selected size variant before use in tight-tolerance applications.

Can this tubing be used outdoors or in high-humidity environments?

Yes. Silicone rubber is inherently resistant to moisture, UV exposure, and weathering, making it suitable for outdoor wiring, marine applications, and humid environments. It generally maintains its flexibility and insulating properties across a wide range of conditions — unlike PVC alternatives that can become brittle over time.

What temperature range can this heat shrink tubing handle?

This silicone rubber tubing is rated to 200°C (392°F) continuous operating temperature, making it suitable for high-heat environments such as engine bays, industrial equipment, and lighting fixtures. It typically remains flexible at low temperatures as well, down to approximately -60°C (-76°F).

Is this tubing flame-retardant?

Silicone rubber heat shrink tubing is generally flame-retardant and self-extinguishing. It does not support combustion under normal conditions, which makes it a reliable choice for electrical insulation in safety-critical applications such as automotive wiring harnesses and industrial control panels.

What tool do I use to shrink this tubing?

A heat gun is the recommended tool. Apply heat evenly along the length of the tubing, starting from the center and working outward to avoid air pockets. A lighter or match can work in a pinch for small diameters, but a heat gun provides more consistent results across the full diameter range. Avoid direct flame contact with the tubing surface.

How do I convert the diameter sizes to inches?

To convert mm to inches, divide by 25.4. Quick reference:

  • 1mm ≈ 0.039"
  • 4mm ≈ 0.157"
  • 10mm ≈ 0.394"
  • 25mm ≈ 0.984"
  • 40mm ≈ 1.575"

Select the diameter that is slightly larger than your wire's outer diameter before shrinking.

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

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