PRODUCT OVERVIEW
Our 2:1 ratio single-wall halogen-free heat shrink tubing is a versatile, environmentally responsible solution for general-purpose electrical insulation, wire identification, and mechanical protection. Manufactured from cross-linked polyolefin formulated without halogens, this tubing delivers reliable flame retardancy with low smoke emission and zero toxic halogen gas release when exposed to fire — making it the preferred choice for green building, mass transit, electronics, and applications requiring compliance with strict environmental and fire safety standards.
With a standard 2-to-1 shrink ratio, this tubing recovers to half its original diameter when heated, providing a snug, uniform fit over wires, connectors, and small components. The single-wall construction offers excellent dielectric strength, abrasion resistance, and color fastness, ideal for cable harnessing, color coding, strain relief, and general electrical insulation across a wide range of industries.
This halogen-free product fully complies with RoHS 3.0, REACH SVHC, and UL 224 VW-1 flammability standards, supporting your environmental compliance and sustainability objectives without compromising performance.
KEY TECHNICAL SPECIFICATIONS
• Shrink Ratio: 2:1 (recovers to 1/2 of original diameter)
• Wall Construction: Single-wall cross-linked polyolefin (halogen-free formulation)
• Operating Temperature Range: -55°C to +125°C (continuous)
• Shrink Initiation Temperature: ≥ 70°C
• Full Recovery Temperature: 110°C
• Dielectric Strength: ≥ 15 kV/mm (ASTM D2671)
• Dielectric Constant: ≤ 2.8 @ 1 MHz
• Volume Resistivity: ≥ 1×10¹⁴ Ω·cm
• Flammability Rating: UL 224 VW-1 (vertical burn)
• Tensile Strength: ≥ 10.4 MPa (ASTM D2671)
• Elongation at Break: ≥ 200%
• Water Absorption: ≤ 0.5%
• Copper Corrosion: Passes ASTM D2671
• Halogen Content: < 900 ppm per element (chlorine, bromine), total halogens < 1500 ppm (IEC 61249-2-21)
• Low Smoke Emission: Compliant with low-smoke requirements for enclosed environments
• Fluid Resistance: Resistant to common solvents, oils, and mild acids
• Certifications: UL Recognized, RoHS 3.0, REACH SVHC Compliant, Halogen-Free per IEC 61249-2-21
PERFORMANCE ADVANTAGES
► Halogen-Free & Environmentally Responsible
Formulated without chlorine, bromine, or other halogenated flame retardants, this tubing produces minimal toxic fumes and corrosive gases during combustion. It meets IEC 61249-2-21 halogen-free standards (total halogens < 1500 ppm), supporting compliance with green building codes, mass transit regulations, and electronics industry environmental requirements.
► Reliable 2:1 Shrink Ratio for General-Purpose Use
The industry-standard 2-to-1 recovery ratio is well-suited for the majority of wire insulation and cable identification applications. It installs quickly and consistently, conforming smoothly to round wires, small connectors, and cylindrical components without requiring specialized tools or techniques.
► UL VW-1 Flame Retardant Performance
The halogen-free flame-retardant formulation achieves UL 224 VW-1 vertical burn certification, providing dependable self-extinguishing performance. Unlike halogenated materials, it achieves this level of fire safety without releasing toxic or corrosive byproducts.
► Excellent Electrical Insulation
With a dielectric strength of 15 kV/mm and high volume resistivity, this tubing provides reliable electrical isolation for low-voltage and signal-level applications, protecting against short circuits, arc flash, and electrostatic discharge.
► Wide Range of Colors for Wire Coding
Available in black, red, blue, yellow, green, white, and clear — enabling easy color-coding of circuits, phases, and functions in cable harnesses, control panels, and data installations.
► Durable & Long-Lasting
Cross-linked molecular structure provides excellent resistance to thermal aging, UV exposure, abrasion, and common fluids. Maintains mechanical and electrical properties throughout the service life across the full -55°C to +125°C operating range.
TYPICAL APPLICATIONS
🔌 Electronics & Electrical Manufacturing
• PCB component lead insulation
• Wire-to-wire splice insulation
• Connector and terminal covering
• Cable harness bundling and identification
🚇 Mass Transit & Rail
• Train and subway wiring harnesses
• Passenger compartment electrical systems
• Low-smoke, low-toxicity enclosed environment applications
🏢 Building & Infrastructure
• Green building electrical installations
• Low-voltage wiring and data cabling
• Fire alarm and security system wiring
• Lighting fixture wire insulation
🚗 Automotive & EV
• Vehicle wiring harness insulation
• Sensor and signal wire protection
• Color-coded circuit identification
• Aftermarket audio and accessory wiring
💻 Data & Telecommunications
• Network cable and patch cord strain relief
• Fiber optic cable buffer protection
• Data center cable management and labeling
🎛️ Industrial Automation & Control
• PLC and control panel wiring
• Sensor and actuator cable insulation
• Machine tool electrical harnesses
• Color-coded phase and function identification
🔬 Medical & Laboratory Equipment
• Medical device wiring insulation
• Laboratory instrument cable protection
• Applications requiring low-toxicity materials
INSTALLATION INSTRUCTIONS
Required Tools: Heat gun (250–350°C output), heat-resistant gloves, utility knife or tubing cutter
Step 1 — Preparation
Cut tubing to the desired length using a sharp blade or tubing cutter. Allow a small overlap beyond the area requiring insulation for complete coverage.
Step 2 — Placement
Slide the tubing over the wire, cable, or component and position it over the target area. For splices, center the tubing over the joint.
Step 3 — Heat Application
Apply heat evenly using a heat gun set to approximately 300°C. Move the heat source gradually along the tubing from one end to the other, or start from the center and work outward. Keep the nozzle at a sufficient distance to avoid scorching or overheating.
Step 4 — Verification
Continue heating until the tubing has fully conformed to the underlying shape with no wrinkles, bubbles, or bridging. The surface should appear smooth and uniformly shrunk.
Step 5 — Cooling
Allow the tubing to cool naturally. Once cooled, the insulation is fully set and ready for service.
Note: Avoid using open-flame torches for electronics or precision applications, as they can cause localized overheating and damage to sensitive components.
QUALITY ASSURANCE & COMPLIANCE
• Manufactured under ISO 9001:2015 certified quality management systems
• Each production lot undergoes dimensional verification, shrink ratio testing, and dielectric breakdown testing
• Halogen content verified per IEC 61249-2-21 standards
• Material traceability available upon request for qualified industrial customers
• Custom sizes, colors, and printed marking available for volume orders (MOQ applies)
PACKAGING OPTIONS
• Bulk Spools: 100m / 200m / 400m continuous lengths on plastic spools
• Cut Pieces: Pre-cut segments in standard or custom lengths
• Assortment Kits: Multi-color / multi-diameter kits for workshops and technicians
• Private Label: Custom branding and packaging available for OEM and resale partners
