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China Suppliers of Excellent Flame Retardant PE Heat Shrink Tube - Quality Factory Products
Features
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◎ Excellent Electrical Insulation
• Provides superior insulation, with a standard voltage rating of up to 600V, effectively preventing current leakage and short circuits.
• High dielectric strength meets the insulation requirements for most low to medium voltage electrical environments. -
◎ Good Flame Retardancy and Safety
• Products can achieve UL VW-1 or higher flame retardancy ratings through added flame retardants, being self-extinguishing and effectively slowing flame spread to enhance electrical safety.
• Some eco-friendly models ensure no harm to humans or the environment during use and disposal. -
◎ Broad Operating Temperature Range
• Standard models have a continuous operating temperature range from -55°C to +125°C, suitable for most indoor and outdoor temperature variations.
• High-temperature enhanced models can withstand up to +135°C or even +150°C, catering to applications in high-temperature environments like engine compartments. -
◎ Reliable Shrinkage and Mechanical Protection
• The standard shrinkage ratio is typically 2:1 (meaning the inner diameter halves after shrinking), ensuring a tight, uniform fit around objects of various shapes upon heating.
• After shrinkage, it provides good mechanical protection, enhancing the abrasion and cut resistance of wire harnesses and preventing corrosion on metal parts.
• The material is soft and elastic, facilitating bending and installation in complex routing situations. -
◎ Outstanding Environmental Compliance and Certifications
• Mainstream products comply with EU environmental directives such as ROHS and REACH, being free of harmful substances like lead, cadmium, and mercury.
• Certified by international safety standards like UL and CSA which fully satisfying export requirements. -
◎ Diverse Functional Designs
• In addition to standard single-wall tubing, dual-wall adhesive-lined tubing is available. The inner layer of hot-melt adhesive melts during shrinkage, providing excellent waterproofing, moisture resistance, and sealing, ideal for outdoor or humid environments.
• Available in various colors including black, red, yellow, green, and blue, facilitating circuit phase identification or product categorization.
Characteristics
| Property | Testing Condition | Index |
| Physical: Tensile Strength | UL224 | ≥10.4Mpa/UL224 |
| Breakage Elongation | UL224 | ≥200% |
| Tensile Strength after aging | 158±1℃, 168hr/UL224 | ≥7.3Mpa/UL224 (Not smaller 70% than before aged) |
| Breakage Elongation after aging | 158±1℃, 168hr/UL224 | ≥100% Tensile Ratio |
| Heat Shock | 250℃, 1hr/UL224 | No cracking |
| Cold Bend | -30℃, 1hr/UL224 | No cracking |
| Electrical: Dielectric Voltage Withstand | 2500V, 60sec/UL224 | No breakdown |
| Volume resistivity | UL224 | ≥1014 Ω.cm |
| Chemical: Copper stability | 158±1℃, 168hr/UL224 | Pass |
| Flammability | VW-1/UL224 (within 15S. 60S self-extinguish) | Pass |
Applications
◎ Electronics, Electrical & Communications: Insulation protection and bundling for various wire harnesses and terminals; encapsulation of components like resistors, capacitors, and inductors; mechanical and electrical isolation of solder joints; antenna protection.
◎ Automotive Industry: Insulation protection for wiring harnesses in new energy and traditional vehicles; connection protection for battery modules; wrapping for sensor cables; waterproof sealing for cable joints.
◎ Power & Electrical: Insulation restoration for low-voltage cable joints and terminations; insulation protection for busbars; anti-corrosion coating for electrical hardware.
◎ Household Appliances: Insulation reinforcement and organization for internal power cords and motor leads.
◎ Military & Marine: Moisture-proof, mildew-proof, and insulation treatment for internal equipment cables; anti-corrosion protection for metal pipes and rods.
Usage and Selection Guide
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◎ Selection Steps
• Determine Size: Measure the maximum outer diameter of the object to be protected. Select a product with a pre-shrink inner diameter 20%-30% larger. Confirm the required final tightly-fitted inner diameter after shrinkage.
• Confirm Performance: Determine the required operating temperature rating, flame retardancy rating (e.g., VW-1), voltage rating, and whether waterproof sealing is needed (choose dual-wall adhesive-lined tubing) based on the application environment.
• Choose Color & Certification: Select color based on identification needs and confirm the product possesses the necessary safety and environmental certifications. -
◎ Shrinkage Process
• Tools: A heat gun, oven, or propane torch is recommended for even heating.
• Procedure: Slide the heat shrink tubing onto the object. Apply heat evenly from the middle towards the ends or from one end to the other. Avoid prolonged concentrated heat on one spot to prevent burning through or charring.
• Completion: Heating is complete when the tubing is fully shrunk, with a smooth, flat surface tightly conforming to the object without bubbles or wrinkles.
Product Specification Sheet
| Specification | Before Contraction (mm) | After Contraction (mm) | Packing (Length) M | Usage Range (mm) | ||
| Inner Diameter (D) | Avg Wall Thickness (r) | Inner Diameter (d) | Wall Thickness (t) | |||
| Φ0.6 | 0.9±0.2 | 0.15±0.03 | ≤0.40 | 0.28±0.06 | 400±3 | 0.4—0.7 |
| Φ0.7 | 0.9±0.2 | 0.15±0.03 | ≤0.45 | 0.28±0.06 | 400±3 | 0.5—0.7 |
| Φ0.8 | 1.1±0.2 | 0.15±0.03 | ≤0.50 | 0.30±0.06 | 400±3 | 0.6—0.8 |
| Φ1.0 | 1.5±0.2 | 0.18±0.03 | ≤0.60 | 0.36±0.08 | 400±3 | 0.75—0.9 |
| Φ1.5 | 2.0±0.3 | 0.18±0.03 | ≤0.85 | 0.36±0.08 | 400±3 | 0.95—1.4 |
| Φ2.0 | 2.5±0.3 | 0.20±0.04 | ≤1.00 | 0.40±0.08 | 400±3 | 1.1—1.8 |
| Φ2.5 | 3.0±0.3 | 0.20±0.04 | ≤1.25 | 0.40±0.08 | 400±3 | 1.35—2.3 |
| Φ3.0 | 3.5±0.4 | 0.20±0.04 | ≤1.5 | 0.40±0.08 | 400±3 | 1.6—2.7 |
| Φ3.5 | 4.0±0.4 | 0.22±0.04 | ≤1.75 | 0.44±0.08 | 400±3 | 1.85—3.2 |
| Φ4.0 | 4.5±0.4 | 0.25±0.04 | ≤2.0 | 0.50±0.08 | 400±3 | 2.1—3.6 |
| Φ4.5 | 5.0±0.4 | 0.25±0.04 | ≤2.25 | 0.50±0.08 | 200±2 | 2.35—4.0 |
| Φ5.0 | 5.5±0.4 | 0.25±0.04 | ≤2.5 | 0.50±0.08 | 200±2 | 2.6—4.5 |
| Φ5.5 | 6.0±0.4 | 0.25±0.04 | ≤2.75 | 0.50±0.08 | 200±2 | 2.8—5.5 |
| Φ6.0 | 6.5±0.4 | 0.28±0.04 | ≤3.0 | 0.55±0.08 | 200±2 | 3.1—5.4 |
| Φ6.5 | 7.0±0.4 | 0.28±0.04 | ≤3.25 | 0.55±0.08 | 100±1 | 3.2—6.0 |
| Φ7.0 | 7.5±0.4 | 0.28±0.04 | ≤3.5 | 0.55±0.08 | 100±1 | 3.7—6.3 |
| Φ8.0 | 8.5±0.5 | 0.28±0.04 | ≤4.0 | 0.60±0.10 | 100±1 | 4.2—7.2 |
| Φ9.0 | 9.5±0.5 | 0.30±0.05 | ≤4.5 | 0.60±0.10 | 100±1 | 4.7—8.0 |
| Φ10 | 10.5±0.5 | 0.30±0.05 | ≤5.0 | 0.60±0.10 | 100±1 | 5.2—9.0 |
| Φ11 | 11.5±0.5 | 0.30±0.05 | ≤5.5 | 0.60±0.10 | 100±1 | 5.7—10 |
| Φ12 | 12.5±0.5 | 0.30±0.05 | ≤6.0 | 0.60±0.10 | 100±1 | 6.2—11 |
| Φ13 | 13.5±0.5 | 0.35±0.06 | ≤6.5 | 0.70±0.10 | 100±1 | 6.7—12 |
| Φ14 | 14.5±0.5 | 0.35±0.06 | ≤7.0 | 0.70±0.10 | 100±1 | 7.3—13 |
| Φ15 | 15.5±0.5 | 0.40±0.08 | ≤7.5 | 0.75±0.10 | 100±1 | 7.8—14 |
| Φ16 | 16.5±0.5 | 0.40±0.08 | ≤8.0 | 0.75±0.10 | 100±1 | 8.3—15 |
| Φ17 | 17.5±0.5 | 0.40±0.08 | ≤8.5 | 0.75±0.10 | 100±1 | 8.8—16 |
| Φ18 | 19.0±0.7 | 0.40±0.08 | ≤9.0 | 0.75±0.10 | 100±1 | 9.3—17 |
| Φ20 | 21.0±0.7 | 0.40±0.08 | ≤10.0 | 0.75±0.10 | 100±1 | 10.4—19 |
| Φ22 | 23.0±0.7 | 0.40±0.08 | ≤11.0 | 0.80±0.10 | 100±1 | 11.4—21 |
| Φ25 | 26.0±0.7 | 0.50±0.10 | ≤12.5 | 0.90±0.10 | 50±0.5 | 12.8—24 |
| Φ28 | 29.0±0.7 | 0.50±0.10 | ≤14.0 | 0.90±0.10 | 50±0.5 | 14.4—29 |
| Φ30 | 31.0±0.7 | 0.50±0.10 | ≤15.0 | 0.95±0.10 | 50±0.5 | 16—29 |
| Φ35 | 36.0±0.7 | 0.50±0.10 | ≤17.5 | 1.00±0.12 | 50±0.5 | 18—34 |
| Φ40 | 41.0±0.7 | 0.55±0.10 | ≤20.0 | 1.00±0.12 | 50±0.5 | 21—39 |
| Φ45 | 46.0±0.7 | 0.55±0.10 | ≤22.5 | 1.00±0.12 | 25±0.5 | 23—44 |
| Φ50 | 51.0±0.7 | 0.55±0.10 | ≤25.0 | 1.00±0.12 | 25±0.5 | 26—49 |
| Size | Before Contraction (mm) | After Contraction (mm) | Packing (Length) M | Usage Range (mm) | ||
| Inner Diameter (D) | Avg Wall Thickness (r) | Inner Diameter (D) | Wall Thickness (t) | |||
| Φ0.6 | 0.9±0.2 | 0.15±0.03 | ≤0.40 | 0.28±0.06 | 400±3 | 0.4—0.7 |
| Φ0.7 | 0.9±0.2 | 0.15±0.03 | ≤0.45 | 0.28±0.06 | 400±3 | 0.5—0.7 |
| Φ0.8 | 1.1±0.2 | 0.15±0.03 | ≤0.50 | 0.30±0.06 | 400±3 | 0.6—0.8 |
| Φ1.0 | 1.5±0.2 | 0.18±0.03 | ≤0.60 | 0.36±0.08 | 400±3 | 0.75—0.9 |
| Φ1.5 | 2.0±0.3 | 0.18±0.03 | ≤0.85 | 0.36±0.08 | 400±3 | 0.95—1.4 |
| Φ2.0 | 2.5±0.3 | 0.20±0.04 | ≤1.00 | 0.40±0.08 | 400±3 | 1.1—1.8 |
| Φ2.5 | 3.0±0.3 | 0.20±0.04 | ≤1.25 | 0.40±0.08 | 400±3 | 1.35—2.3 |
| Φ3.0 | 3.5±0.4 | 0.20±0.04 | ≤1.5 | 0.40±0.08 | 400±3 | 1.6—2.7 |
| Φ3.5 | 4.0±0.4 | 0.22±0.04 | ≤1.75 | 0.44±0.08 | 400±3 | 1.85—3.2 |
| Φ4.0 | 4.5±0.4 | 0.25±0.04 | ≤2.0 | 0.50±0.08 | 400±3 | 2.1—3.6 |
| Φ4.5 | 5.0±0.4 | 0.25±0.04 | ≤2.25 | 0.50±0.08 | 200±2 | 2.35—4.0 |
| Φ5.0 | 5.5±0.4 | 0.25±0.04 | ≤2.5 | 0.50±0.08 | 200±2 | 2.6—4.5 |
| Φ5.5 | 6.0±0.4 | 0.25±0.04 | ≤2.75 | 0.50±0.08 | 200±2 | 2.8—5.5 |
| Φ6.0 | 6.5±0.4 | 0.28±0.04 | ≤3.0 | 0.55±0.08 | 200±2 | 3.1—5.4 |
| Φ6.5 | 7.0±0.4 | 0.28±0.04 | ≤3.25 | 0.55±0.08 | 100±1 | 3.2—6.0 |
| Φ7.0 | 7.5±0.4 | 0.28±0.04 | ≤3.5 | 0.55±0.08 | 100±1 | 3.7—6.3 |
| Φ8.0 | 8.5±0.5 | 0.28±0.04 | ≤4.0 | 0.60±0.10 | 100±1 | 4.2—7.2 |
| Φ9.0 | 9.5±0.5 | 0.30±0.05 | ≤4.5 | 0.60±0.10 | 100±1 | 4.7—8.0 |
| Φ10 | 10.5±0.5 | 0.30±0.05 | ≤5.0 | 0.60±0.10 | 100±1 | 5.2—9.0 |
| Φ11 | 11.5±0.5 | 0.30±0.05 | ≤5.5 | 0.60±0.10 | 100±1 | 5.7—10 |
| Φ12 | 12.5±0.5 | 0.30±0.05 | ≤6.0 | 0.60±0.10 | 100±1 | 6.2—11 |
| Φ13 | 13.5±0.5 | 0.35±0.06 | ≤6.5 | 0.70±0.10 | 100±1 | 6.7—12 |
| Φ14 | 14.5±0.5 | 0.35±0.06 | ≤7.0 | 0.70±0.10 | 100±1 | 7.3—13 |
| Φ15 | 15.5±0.5 | 0.40±0.08 | ≤7.5 | 0.75±0.10 | 100±1 | 7.8—14 |
| Φ16 | 16.5±0.5 | 0.40±0.08 | ≤8.0 | 0.75±0.10 | 100±1 | 8.3—15 |
| Φ17 | 17.5±0.5 | 0.40±0.08 | ≤8.5 | 0.75±0.10 | 100±1 | 8.8—16 |
| Φ18 | 19.0±0.7 | 0.40±0.08 | ≤9.0 | 0.75±0.10 | 100±1 | 9.3—17 |
| Φ20 | 21.0±0.7 | 0.40±0.08 | ≤10.0 | 0.75±0.10 | 100±1 | 10.4—19 |
| Φ22 | 23.0±0.7 | 0.40±0.08 | ≤11.0 | 0.80±0.10 | 100±1 | 11.4—21 |
| Φ25 | 26.0±0.7 | 0.50±0.10 | ≤12.5 | 0.90±0.10 | 50±0.5 | 12.8—24 |
| Φ28 | 29.0±0.7 | 0.50±0.10 | ≤14.0 | 0.90±0.10 | 50±0.5 | 14.4—29 |
| Φ30 | 31.0±0.7 | 0.50±0.10 | ≤15.0 | 0.95±0.10 | 50±0.5 | 16—29 |
| Φ35 | 36.0±0.7 | 0.50±0.10 | ≤17.5 | 1.00±0.12 | 50±0.5 | 18—34 |
| Φ40 | 41.0±0.7 | 0.55±0.10 | ≤20.0 | 1.00±0.12 | 50±0.5 | 21—39 |
| Φ45 | 46.0±0.7 | 0.55±0.10 | ≤22.5 | 1.00±0.12 | 25±0.5 | 23—44 |
| Φ50 | 51.0±0.7 | 0.55±0.10 | ≤25.0 | 1.00±0.12 | 25±0.5 | 26—49 |
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Frequently Asked Questions
QWhat is the standard shrinkage ratio of your heat shrink tubing, and how do I choose the right size?
The standard shrinkage ratio is 2:1, meaning the inner diameter reduces by half after heating. To select the right size, measure the maximum outer diameter of the object to be covered, then choose a tubing with a pre-shrink inner diameter that is 20%–30% larger than that measurement to ensure a snug, uniform fit after shrinkage.
QWhat is the operating temperature range of your heat shrink tubing?
Standard models support a continuous operating temperature range of -55°C to +125°C, making them suitable for most indoor and outdoor environments. High-temperature enhanced models can withstand up to +135°C or even +150°C, ideal for demanding applications such as engine compartments and industrial settings.
QDoes your heat shrink tubing meet international safety and environmental certifications?
Yes. Our mainstream products comply with EU environmental directives including RoHS and REACH, and are free of hazardous substances such as lead, cadmium, and mercury. They are also certified to international safety standards including UL and CSA, fully satisfying export and compliance requirements.
QWhat is the difference between single-wall and dual-wall adhesive-lined heat shrink tubing?
Single-wall tubing provides standard electrical insulation, mechanical protection, and bundling. Dual-wall adhesive-lined tubing features an inner layer of hot-melt adhesive that melts during the shrinking process, creating a waterproof, moisture-resistant, and airtight seal. This makes dual-wall tubing the preferred choice for outdoor, marine, and humid environment applications.
QWhat tools are recommended for shrinking the tubing, and what should I be careful about?
A heat gun, oven, or propane torch is recommended for even, consistent heating. When applying heat, work from the middle outward or from one end to the other to prevent air pockets or wrinkles. Avoid concentrating heat on a single spot for too long, as this may cause burning or charring. Heating is complete when the tubing conforms smoothly and tightly to the surface without bubbles.
QWhat are the main application industries for your heat shrink tubing?
Our heat shrink tubing is widely used across multiple industries, including electronics and electrical engineering (wire harness insulation, component encapsulation), the automotive industry (EV and traditional vehicle wiring, battery module connections), power and electrical infrastructure (cable joint insulation, busbar protection), household appliances (motor lead organization), and military and marine sectors (moisture-proof and corrosion-resistant cable treatment).