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    China Flame Retardant-Grade Silicone Heat Shrink Tubing - Quality Suppliers & Factory Solutions
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    China Flame Retardant-Grade Silicone Heat Shrink Tubing - Quality Suppliers & Factory Solutions

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    Product Overview

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    Introducing our Flame Retardant-Grade Silicone Heat Shrink Tubing, a top-tier protective sleeve manufactured in China by leading suppliers with advanced factory processes. This silicone tubing is made from high-quality silicone rubber that undergoes specialized flame-retardant formulations and radiation modifications.

    ,

    Our silicone heat shrink tubing not only boasts excellent high and low temperature resistance, impressive weather ability, and remarkable flexibility, but it also includes superior flame-retardant properties. These features work together to effectively prevent the spread of flames, ensuring a higher level of safety for critical circuits and electrical equipment.

    ,

    Choose our Flame Retardant-Grade Silicone Heat Shrink Tubing for reliable protection in demanding applications, sourced from trusted suppliers and produced in our state-of-the-art factory.

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    • Project: Fire retardant type
    • Shrink Temperature(℃): More than 100
    • Temperature Range(℃): -50-170
    • Tensile Strength(MPa): ≥5.0
    • Fire Retardant Grade(UL-94): V1 (3mm thickness)
    Contact us
    Product Details

    Key Features
    • Exceptional Flame Retardancy

      The product complies with stringent flame retardancy standards such as UL 94 V-0 or VW-1. It self-extinguishes quickly in an open flame, effectively suppressing fire spread and significantly enhancing electrical safety.

    • Wide Operating Temperature Range

      Capable of continuous long-term use in extreme temperatures from -60℃ to 200℃, with short-term tolerance up to 260℃. It performs stably without deformation in harsh environments like high-temperature baking or freezing conditions.

    • Superior Electrical Insulation

      Possesses high dielectric strength (typically 19.7 KV/mm to 25 KV/mm) and volume resistivity (≥2×10¹² Ω·cm), offering reliable insulation protection for wires, cables, and electronic components, preventing short circuits and leakage.

    • Excellent Physical & Chemical Stability

      High tensile strength (≥6.5 MPa), good elongation, and tear resistance. It also exhibits excellent resistance to acids, alkalis, solvents, oils, and ozone aging, protecting against various chemical corrosions and harsh outdoor environments.

    • Environmental Safety

      Complies with environmental directives like RoHS and REACH. It is halogen-free, non-toxic, odorless, and produces low smoke upon combustion, ensuring safety for both people and the environment.

    Characteristics
    Project Fire Retardant Type
    Shrink Temperature (℃) More than 100
    Temperature Range (℃) -50 ~ 170
    Tensile Strength (MPa) ≥5.0
    Tearing strength; peeling strength (KN/m) ≥25
    Ultimate Elongation (%) ≥400
    Pull off permanent deformation (%) ≥20
    Rebound degree (%) ≥25
    Proportion (G/mL) 1.2±0.1
    Dielectric strength (KV/mm) ≥20
    Fire retardant grade (UL-94) V1 (3mm thickness)
    Hardness (A) 65±10
    Application

    This product is widely used in fields demanding high safety and reliability:

    Product Application
    Product Application

    ◎ Transportation: Insulation and protection for wiring harness terminals in high-speed trains, military vehicles, ships, and aerospace equipment.

    ◎ Power & New Energy: Insulation and sealing protection for high-voltage electrical connections in special transformers, motors, photovoltaic inverters, and wind turbine generators.

    China Flame Retardant-grade Silicone Heat-shrink Tube Factory
    Product Application

    ◎ High-End Manufacturing: Cable protection for equipment in petrochemical, metallurgical electronics, and instrumentation industries, offering both corrosion and flame resistance.

    ◎ Electronics & Electrical Appliances: Insulation sleeving and safety protection for internal cables in household appliances (e.g., coffee makers, water heaters), industrial electrical equipment, and lighting fixtures.

    Product Specification Sheet
    Specification Sheet 01
    Specification Sheet 02
    Silicone heat-shrink tube (flame retardant) 1.7 times
    Specifications Before Contraction After Contraction Packing MOQ
    Inner Diameter Wall Thickness Inner Diameter Wall Thickness
    1.0 1.0-1.5 0.5±0.1 0.54-0.69 0.8±0.15 200M 2000M
    1.5 1.5-2.0 0.5±0.1 0.81-1.03 0.8±0.15 200M 2000M
    2.0 2.0-2.5 0.5±0.1 1.08-1.38 0.8±0.15 200M 2000M
    2.5 2.5-3.0 0.5±0.1 1.35-1.72 0.8±0.15 200M 2000M
    3.0 3.0-3.5 0.5±0.1 1.62-2.07 0.8±0.15 200M 1200M
    3.5 3.5-4.2 0.5±0.1 1.89-2.41 0.8±0.15 200M 1200M
    4.0 4.0-4.8 0.5±0.1 2.16-2.76 0.8±0.15 200M 1200M
    4.5 4.5-5.3 0.5±0.1 2.43-3.1 0.8±0.15 200M 1200M
    5.0 5.0-5.8 0.5±0.1 2.7-3.45 0.8±0.15 200M 1200M
    5.5 5.5-6.5 0.5±0.1 2.97-3.79 0.8±0.15 200M 1000M
    6.0 6.0-7.0 0.5±0.1 3.24-4.14 0.8±0.15 200M 1000M
    6.5 6.5-7.5 0.5±0.1 3.51-4.48 0.9±0.15 200M 1000M
    7.0 7.0-8.0 0.5±0.1 3.78-4.83 0.9±0.15 100M 1000M
    7.5 7.5-8.5 0.5±0.1 4.05-5.17 0.9±0.15 100M 1000M
    8.0 8.0-9.2 0.5±0.1 4.32-5.52 0.9±0.15 100M 1000M
    8.5 8.5-9.7 0.5±0.15 4.59-5.86 0.9±0.15 100M 1000M
    9.0 9.0-10.3 0.5±0.15 4.86-6.21 0.9±0.15 100M 1000M
    10 10-11.5 0.5±0.15 5.41-6.9 0.9±0.15 100M 500M
    11 11-12.5 0.5±0.15 5.95-7.59 0.9±0.15 100M 500M
    10 10-12 1.0±0.2 5.41-6.9 1.8±0.2 50M 500M
    11 11-13 1.0±0.2 5.95-7.59 1.8±0.2 50M 500M
    12 12-14 1.0±0.2 6.49-8.28 1.8±0.2 50M 500M
    13 13-15.5 1.0±0.2 7.03-8.97 1.8±0.2 50M 500M
    14 14-16.5 1.0±0.2 7.57-9.66 1.8±0.2 50M 500M
    15 15-17.5 1.0±0.2 8.11-10.34 1.9±0.2 50M 500M
    16 16-18.8 1.0±0.2 8.65-11.03 1.9±0.2 50M 500M
    17 17-19.8 1.0±0.2 9.19-11.72 1.9±0.2 50M 300M
    18 18-20.8 1.0±0.2 9.73-12.41 1.9±0.2 50M 300M
    19 19-21.8 1.0±0.2 10.27-13.1 1.9±0.2 50M 300M
    20 20-22.8 1.0±0.25 10.81-13.79 2.0±0.2 50M 300M
    21 21-24.5 1.0±0.25 11.35-14.48 2.0±0.2 25M 300M
    22 22-25.5 1.0±0.25 11.89-15.17 2.0±0.2 25M 300M
    25 25-28.5 1.0±0.25 13.51-17.24 2.0±0.2 25M 200M
    30 30-34 1.0±0.25 16.22-20.69 2.0±0.2 25M 200M
    35 35-40 1.0±0.25 18.92-24.14 2.1±0.3 25M 200M
    40 40-45 1.0±0.3 21.62-27.59 2.1±0.3 25M 200M
    45 45-50 1.0±0.3 24.32-31.03 2.1±0.3 25M 150M
    50 50-56 1.0±0.3 27.03-34.48 2.1±0.3 25M 150M
    60 60-66 1.0±0.3 32.43-41.38 2.1±0.3 25M 150M
    70 65-80 1.0±0.4 37.84-48.27 2.1±0.3 25M 100M
    80 75-90 1.0±0.4 43.24-55.17 2.2±0.35 25M 100M
    90 85-100 1.3±0.3 48.65-62.07 2.5±0.3 1M-Bar 100M
    100 95-110 1.3±0.35 54.05-68.97 2.5±0.35 1M-Bar 100M
    110 105-120 1.3±0.35 59.46-75.86 2.6±0.35 1M-Bar 100M
    120 115-130 1.4±0.35 64.86-82.76 2.6±0.4 1M-Bar 75M
    130 125-140 1.4±0.4 70.27-89.66 2.6±0.4 1M-Bar 75M
    140 130-150 1.5±0.4 75.68-96.55 2.6±0.4 1M-Bar 75M
    150 140-160 1.5±0.4 81.08-103.45 2.7±0.4 1M-Bar 75M
    160 150-170 1.5±0.4 85-95 2.8±0.4 1M-Bar 75M
    170 160-180 1.5±0.4 85-95 3.0±0.4 1M-Bar 75M
    180 170-190 1.5±0.4 85-95 3.2±0.4 1M-Bar 75M
    190 180-200 1.5±0.5 95-105 3.2±0.5 1M-Bar 75M
    200 190-210 1.5±0.5 95-110 3.2±0.5 1M-Bar 75M
    210 200-220 1.5±0.5 95-110 3.2±0.5 1M-Bar 75M
    220 210-230 1.5±0.5 95-110 3.2±0.5 1M-Bar 75M
    Silicone heat shrink tube (flame retardant) 2 times
    Specifications Before Contraction After Contraction Packing MOQ
    Inner Diameter Wall Thickness Inner Diameter Wall Thickness
    1.0 1.0-1.5 0.5±0.1 0.49-0.56 1.0±0.15 200M 2000M
    1.5 1.5-2.0 0.5±0.1 0.73-0.83 1.0±0.15 200M 2000M
    2.0 2.0-2.5 0.5±0.1 0.98-1.11 1.0±0.15 200M 2000M
    2.5 2.5-3.0 0.5±0.1 1.22-1.39 1.0±0.15 200M 2000M
    3.0 3.0-3.5 0.5±0.1 1.46-1.67 1.0±0.15 200M 1200M
    3.5 3.5-4.2 0.5±0.1 1.71-1.94 1.0±0.15 200M 1200M
    4.0 4.0-4.8 0.5±0.1 1.95-2.22 1.0±0.2 200M 1200M
    4.5 4.5-5.3 0.5±0.1 2.2-2.5 1.0±0.2 200M 1200M
    5.0 5.0-5.8 0.5±0.1 2.44-2.78 1.0±0.2 200M 1200M
    5.5 5.5-6.5 0.5±0.1 2.68-3.06 1.0±0.2 200M 1000M
    6.0 6.0-7.0 0.5±0.15 2.93-3.33 1.0±0.2 200M 1000M
    6.5 6.5-7.5 0.5±0.15 3.17-3.61 1.0±0.2 200M 1000M
    7.0 7.0-8.0 0.5±0.15 3.41-3.89 1.0±0.2 100M 1000M
    7.5 7.5-8.5 0.5±0.15 3.66-4.17 1.0±0.2 100M 1000M
    8.0 8.0-9.2 0.5±0.15 3.9-4.44 1.0±0.2 100M 1000M
    8.5 8.5-9.7 0.5±0.15 4.15-4.72 1.0±0.2 100M 1000M
    9.0 9.0-10.3 0.5±0.15 4.39-5 1.0±0.2 100M 1000M
    10 10-11.5 0.5±0.15 4.88-5.56 1.0±0.2 100M 500M
    11 11-12.5 0.5±0.15 5.37-6.11 1.0±0.2 100M 500M
    10 10-12 1.0±0.2 4.88-5.56 2.0±0.3 50M 500M
    11 11-13 1.0±0.2 5.37-6.11 2.0±0.3 50M 500M
    12 12-14 1.0±0.2 5.85-6.67 2.0±0.3 50M 500M
    13 13-15.5 1.0±0.2 6.34-7.22 2.0±0.3 50M 500M
    14 14-16.5 1.0±0.2 6.83-7.78 2.0±0.3 50M 500M
    15 15-17.5 1.0±0.2 7.32-8.33 2.0±0.3 50M 500M
    16 16-18.8 1.0±0.2 7.8-8.89 2.0±0.3 50M 500M
    17 17-19.8 1.0±0.2 8.29-9.44 2.0±0.3 50M 300M
    18 18-20.8 1.0±0.2 8.78-10 2.0±0.3 50M 300M
    19 19-21.8 1.0±0.2 9.27-10.56 2.0±0.3 50M 300M
    20 20-22.8 1.0±0.25 9.76-11.11 2.0±0.3 50M 300M
    21 21-24.5 1.0±0.25 10.24-11.67 2.0±0.3 25M 300M
    22 22-25.5 1.0±0.25 10.73-12.22 2.0±0.3 25M 300M
    25 25-28.5 1.0±0.25 12.2-13.89 2.0±0.3 25M 200M
    30 30-34 1.0±0.25 14.63-16.67 2.0±0.3 25M 200M
    35 35-40 1.0±0.25 17.07-19.44 2.0±0.3 25M 200M
    40 40-45 1.0±0.3 19.51-22.22 2.0±0.3 25M 200M
    45 45-50 1.0±0.3 21.95-25 2.0±0.3 25M 150M
    50 50-56 1.0±0.3 24.39-27.78 2.3±0.3 25M 150M
    60 60-66 1.0±0.3 29.27-33.33 2.3±0.3 25M 150M
    70 65-80 1.0±0.4 34.15-38.89 2.3±0.5 25M 100M
    80 75-90 1.1±0.4 39.02-44.44 2.3±0.5 25M 100M
    90 85-100 1.3±0.3 43.9-50 2.6±0.6 1M-Bar 100M
    100 95-110 1.3±0.5 48.78-55.56 2.6±0.6 1M-Bar 100M
    110 105-120 1.3±0.5 53.66-61.11 2.7±0.6 1M-Bar 100M
    120 115-130 1.3±0.6 58.54-66.67 2.8±0.7 1M-Bar 75M
    130 125-140 1.3±0.6 63.41-72.22 2.8±0.7 1M-Bar 75M
    140 130-150 1.6±0.6 68.29-77.78 3.0±0.8 1M-Bar 75M
    150 140-160 1.6±0.6 73.17-83.33 3.2±0.8 1M-Bar 75M
    160 150-170 1.6±0.6 85-94 3.2±0.8 1M-Bar 75M
    170 160-180 1.6±0.6 85-94 3.2±0.8 1M-Bar 75M
    180 170-190 1.6±0.6 85-94 3.3±0.8 1M-Bar 75M
    190 180-200 1.8±1.0 95-103 3.3±1.0 1M-Bar 75M
    200 190-210 1.8±1.0 95-108 3.5±1.0 1M-Bar 75M
    210 200-220 1.8±1.0 95-108 3.6±1.2 1M-Bar 75M
    220 210-230 1.8±1.0 95-108 3.8±1.2 1M-Bar 75M
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    Frequently Asked Questions
    What flame retardancy standards does this silicone heat-shrink tube comply with? +
    This silicone heat-shrink tube complies with stringent flame retardancy standards including UL 94 V-0 and VW-1. It achieves a fire retardant grade of V1 at 3mm thickness. The product self-extinguishes quickly when exposed to an open flame, effectively suppressing fire spread and significantly enhancing electrical safety in critical applications.
    What is the operating temperature range of the flame-retardant silicone heat-shrink tube? +
    The product supports continuous long-term use across an extreme temperature range of -50℃ to 170℃ (as shown in characteristics), with short-term tolerance up to 260℃. The shrink temperature is above 100℃. It maintains stable performance without deformation in harsh environments such as high-temperature baking ovens or sub-zero freezing conditions.
    What shrink ratios are available, and how do I choose the right one? +
    Two shrink ratios are available: 1.7× and 2× (2:1). The 1.7× ratio is suitable for applications where a tighter, more precise fit is required over components with moderate size differences. The 2× ratio provides greater flexibility, accommodating a wider range of component diameters. Specifications range from 1.0mm to 220mm inner diameter in both types. Please refer to the specification sheets above to select the appropriate size for your application.
    Is this product compliant with RoHS and REACH environmental regulations? +
    Yes. This flame-retardant silicone heat-shrink tube fully complies with RoHS and REACH environmental directives. It is halogen-free, non-toxic, and odorless. Upon combustion, it produces only low smoke, ensuring safety for both personnel and the surrounding environment. It is a responsible choice for environmentally conscious industries and applications.
    What industries and applications is this silicone heat-shrink tube best suited for? +
    This product is widely used across multiple high-demand industries: Transportation (wiring harness insulation for high-speed trains, military vehicles, ships, and aerospace); Power & New Energy (high-voltage connections in transformers, photovoltaic inverters, and wind turbine generators); High-End Manufacturing (cable protection in petrochemical and metallurgical industries); and Electronics & Electrical Appliances (insulation sleeving for household appliances, industrial equipment, and lighting fixtures).
    What are the key mechanical and electrical properties of this product? +
    The product offers outstanding mechanical and electrical performance: Tensile Strength ≥5.0 MPa; Ultimate Elongation ≥400%; Tearing/Peeling Strength ≥25 KN/m; Dielectric Strength ≥20 KV/mm; Hardness 65±10 Shore A; Proportion 1.2±0.1 G/mL; and Rebound Degree ≥25%. These properties ensure reliable insulation, durability, and long-term protection in demanding electrical and industrial environments.