Orange Polyolefin Heat Shrink Tube 2:1 — Weatherproof Wire Sleeving for Demanding Environments
When exposed wiring, corroded terminals, or unprotected splices become a liability on the job, the right heat shrink tubing makes the difference between a lasting repair and a recurring fault. This orange polyolefin heat shrink tube is designed for electricians, automotive technicians, marine riggers, and workshop DIYers who need a reliable, color-coded sleeving solution that performs under heat, moisture, and mechanical stress.
Each roll is made from dual-wall-capable polyolefin with a 2:1 shrink ratio, meaning the tubing shrinks to half its unshrunk diameter when heated to approximately 70–120 °C (158–248 °F). Available in unshrunk diameters from Φ1 mm (≈ 0.04 in) up to Φ50 mm (≈ 1.97 in), and in cut lengths from 1 M to 50 M, so you can match the exact coverage your project demands without waste.
Typical applications include automotive wiring harness repair, marine cable bundling, workshop tool cord protection, and electrical panel wire identification — all scenarios where orange heat shrink tubing for wire insulation and color-coded cable sleeving for circuit labeling deliver both function and clarity.
⚡ Compatibility: Suitable for copper, aluminum, and tinned conductors. Works with standard heat guns, soldering station hot-air attachments, and industrial heat tunnels. Not recommended for use with open-flame torches.
✅ Key Features of These Orange Polyolefin Heat Shrink Tubes
🔶 High-Visibility Orange Color
The bright orange finish provides instant visual identification in wiring harnesses, control panels, and multi-conductor bundles — reducing tracing time during maintenance and inspection.
💧 Weatherproof Moisture Barrier
Once shrunk, the tubing forms a snug, moisture-resistant sleeve around the conductor or splice, protecting against humidity, condensation, and incidental water exposure in outdoor and under-hood environments.
🔥 2:1 Shrink Ratio — Consistent Fit
Activates at approximately 70–120 °C and shrinks uniformly to half the unshrunk diameter, conforming tightly to irregular connector shapes and multi-wire bundles without splitting or lifting at the edges.
📏 Wide Diameter Range: Φ1 mm to Φ50 mm
Covers everything from fine instrument wiring (Φ1 mm / 0.04 in) to large-diameter cable bundles (Φ50 mm / 1.97 in), eliminating the need to stock multiple product lines for a single project.
✂️ Flexible Length Options: 1 M to 50 M
Order exactly the length you need — from a 1 M sample for a single repair to a 50 M roll for production runs — keeping material costs in line with actual project scope.
🛡️ Flame-Retardant Polyolefin Construction
The polyolefin base material meets standard flame-retardant requirements, self-extinguishing when the heat source is removed, and resists cracking, UV degradation, and common workshop chemicals including oils and mild solvents.
📐 Technical Specifications — Polyolefin Heat Shrink Tubing
| Material |
Polyolefin (flame-retardant) |
| Color |
Orange |
| Shrink Ratio |
2:1 |
| Shrink Temperature |
Approx. 70–120 °C (158–248 °F) |
| Unshrunk Diameter |
Φ1 mm – Φ50 mm (see variant options) |
| Shrunk Diameter (approx.) |
Φ0.5 mm – Φ25 mm (see variant options) |
| Available Lengths |
1 M, 2 M, 3 M, 4 M, 5 M, 8 M, 10 M, 20 M, 50 M (see variant options) |
| Wall Thickness (shrunk) |
See variant options |
| Operating Temperature |
-55 °C to +125 °C (-67 °F to +257 °F) |
| Voltage Rating |
Contact us to confirm |
| Flame Retardancy |
Self-extinguishing per standard polyolefin spec |
| Chemical Resistance |
Oils, mild solvents, UV exposure |
| Suitable Conductors |
Copper, aluminum, tinned wire |
| Application Method |
Heat gun, hot-air tool, industrial heat tunnel |
❓ Frequently Asked Questions
How do I choose the right diameter for my wire or cable?
Measure the outer diameter of the wire, connector, or bundle you need to cover. Select an unshrunk diameter that is at least 10–20% larger than that measurement so the tubing slides on easily before heating. After shrinking, the tubing will conform to approximately half the unshrunk diameter, so verify the shrunk size is smaller than your conductor for a secure fit. For example, a Φ6 mm unshrunk tube shrinks to roughly Φ3 mm.
What heat source should I use to shrink this tubing?
A standard heat gun set to 70–120 °C is the recommended tool. Move the gun steadily along the tube to shrink evenly from one end to the other. Hot-air attachments on soldering stations also work well for small-diameter sizes. Avoid open-flame lighters or torches — uneven, concentrated heat can scorch the tubing or cause uneven shrinkage that leaves gaps at the ends.
Is this tubing waterproof or just water-resistant?
This is a single-wall polyolefin tube, which provides a moisture-resistant barrier once fully shrunk. It resists humidity, condensation, and incidental water splash. It is not a dual-wall adhesive-lined tube, so it does not create a fully sealed, submersion-rated waterproof joint. For fully waterproof connections in submerged or high-pressure wash environments, consider a dual-wall adhesive-lined heat shrink tube instead.
Can I use this tubing in automotive or marine applications?
Yes. The flame-retardant polyolefin material withstands the temperature range and chemical exposure typical of engine bays, bilge areas, and outdoor wiring runs. The orange color also serves as a useful circuit identifier in multi-harness automotive and marine installations. Ensure the shrunk diameter fits snugly over your connector to prevent moisture ingress at the ends.
How does the 2:1 shrink ratio affect my selection?
A 2:1 ratio means the tubing shrinks to 50% of its listed unshrunk diameter. So a Φ10 mm tube becomes approximately Φ5 mm when fully shrunk. This ratio suits most standard wiring and connector applications. If you need to cover a connector with a large flange or an irregular shape, choose a diameter generously larger than the widest point so the tube can slide over before heating.
Does the orange color fade or change after shrinking?
The orange pigment is compounded into the polyolefin material, not a surface coating, so it does not peel or flake. Some slight deepening of the color tone is normal as the wall thickens during shrinkage. The color remains stable under normal operating temperatures and UV exposure typical of outdoor or under-hood environments.
Can I cut the tubing to a shorter length before applying it?
Yes. Use sharp scissors or a utility knife to cut the tubing to any length before heating. Cut ends are clean and do not fray. For best results, cut the tube slightly longer than the area you need to cover — typically 5–10 mm of overlap on each side of a splice or connector — to ensure full coverage after shrinkage causes minor longitudinal shortening (typically 5–10% length reduction).
🛒 Select your Diameter and Length above, then add to cart.
