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Self-Wrapping Aluminum Foil Fiberglass Wire Heat Shield Sleeve

MJ FLEX GF-AS-N provides retrofit thermal protection for installed wires, cable harnesses and small hoses. Its self-wrapping construction opens along the entire length, allowing the sleeve to be positioned around an existing assembly without removing terminals or connectors.An adhesive inner layer holds the overlapping edges in place, while the aluminum foil exterior is oriented toward the heat source. This combination supports faster installation, stable overlap and access to irregular or difficult-to-reach cable routes.

  • Material :

    Aluminum foil + glass fiber + PET
  • Temperatura de trabalho :

    -40℃~ +200℃
  • Inflamabilidade :

    FMVSS 302
  • Cor padrão :

    Outer surface: Silver (aluminum foil) ; Inner surface: White (adhesive layer)
  • MOQ :

    200m
  • Why Choose GF-AS-N

    • Reflective Thermal Protection

    The aluminum foil surface helps reduce radiant heat exposure to cables and wire harnesses, providing additional thermal protection near heat sources.

    • Convenient Wraparound Installation

    The wraparound design allows installation over existing cables and wire harnesses without disconnecting connectors, simplifying assembly, inspection and maintenance.

    • Self-Adhesive Closure

    The self-adhesive inner layer works with the overlapping wrap to help secure the sleeve in position and reduce the need for additional fastening materials.

    • Multifunctional Cable Protection

    The aluminum foil and fiberglass composite construction combines thermal protection, external mechanical shielding and EMI/RFI protection features.

    • Flexible Fit for Different Harness Sizes

    Multiple inside diameters and spread widths accommodate different harness sizes and wrapping requirements.

    • Practical for Maintenance and Retrofitting

    The sleeve can be installed without rerouting cables, making it practical for equipment upgrades, localized heat protection and maintenance projects.

     

    Key Features

    • Aluminum Foil Laminated Surface

    Features an aluminum foil laminated outer surface that reflects radiant heat and helps limit heat transfer toward protected cables.

    • Fiberglass Composite Construction

    Combines aluminum foil, fiberglass and PET materials to provide thermal resistance, structural stability and practical flexibility.

    • Self-Wrapping Design

    The open wraparound construction allows the sleeve to be fitted along existing cables and harnesses.

    • Integrated Adhesive Layer

    An integrated self-adhesive inner layer works with the overlapping construction to support secure and convenient installation.

    • Overlapping Coverage

    Designed with an overlap of at least 35% to help maintain continuous coverage around cable bundles.

     

    Technical Data

    Material Aluminum foil + glass fiber + PET
    Working Temperature −40°C to +200°C
    Flammability FMVSS 302
    Heat Insulation Heat insulation performance≥80℃,refer to SAE J2302
    Oil Resistance No delamination or degradation after specified test, referring to GMW15608
    High-Temperature Aging Without delamination at 168H / 175 ℃,refer to GMW15608
    Low Temperature Flexibility No cracks and no delamination on the sample after -at 40 ℃ / 24H test,refer to GMW15608
    Coincidence Rate ≥35%
    Color

    Outer surface: Silver (aluminum foil) ; Inner surface: White (adhesive layer)

    Cutting Tool Scissor

     

    Specifications

    Part No. Diameter Spread Width
    (mm)
    Overlap Packing Length
    (m/spool)
    I.D. (mm) O.D. (mm)
    GF-AS-N-006-WH/SR 6 ± 2 8 ± 2 30 ± 3 ≥35% 1m / pcs
    Within 1M
    can be cut
    and
    packaged
    according
    to customer
    length


    GF-AS-N-008-WH/SR 8 ± 2 10 ± 2 37 ± 3 ≥35%
    GF-AS-N-010-WH/SR 10 ± 2 12 ± 2 51 ± 3 ≥35%
    GF-AS-N-013-WH/SR 13 ± 2 15 ± 2 60 ± 3 ≥35%
    GF-AS-N-016-WH/SR 16 ± 2 18 ± 2 70 ± 3 ≥35%
    GF-AS-N-019-WH/SR 19 ± 2 21 ± 2 90 ± 3 ≥35%
    GF-AS-N-025-WH/SR 25 ± 2 27 ± 2 108 ± 5 ≥35%
    GF-AS-N-032-WH/SR 32 ± 2 34 ± 2 132 ± 5 ≥35%
    GF-AS-N-038-WH/SR 38 ± 2 40 ± 2 158 ± 5 ≥35%
    GF-AS-N-043-WH/SR 43 ± 2 45 ± 2 190 ± 5 ≥35%

     

    Typical Applications

    • Automotive Wire Harnesses

    Protects automotive wire harnesses routed near engine-compartment heat sources and hot components by helping reduce radiant heat exposure.

    • Industrial Machinery Wiring

    Provides localized thermal protection for cables and control harnesses routed near heat-generating components in industrial machinery.

    • Electrical Control Systems

    Supports electrical cable routing where heat exposure and electromagnetic interference are concerns, subject to shielding and grounding verification.

    • Power and Electronic Equipment

    Helps protect power cables and connecting wires near heat-generating components from external radiant heat.

    • Cable Bundles Near Hot Surfaces

    Adds reflective thermal protection to cable bundles routed near hot pipes, equipment housings and other heat sources.

     

    How to Select

    Measure the outside diameter of the cable or wire harness, including the largest section that requires protection. Select a suitable nominal sleeve diameter and spread width, allowing sufficient overlap after installation without excessive tension.

    Check the operating temperature, distance from heat sources, bend radius, vibration and possible oil exposure. For applications requiring EMI/RFI protection, consider the complete shielding arrangement, including overlap, electrical continuity and grounding.

    Ensure the installation surface is clean and suitable for the adhesive layer. For demanding applications, verify the finished assembly under actual operating conditions before bulk production.

     

    Customization Available

    • Sizes & Dimensions - Multiple standard inside diameters and spread widths are available to accommodate different cable bundle sizes and wrapping requirements.

    • Material & Construction Options - For special projects, composite construction, wrap width and adhesive attachment requirements can be reviewed according to the application, subject to technical approval.

    • Packaging - Custom piece packing, quantity kits, product labels and packaging options can be arranged to support assembly, storage and delivery requirements.

     

    Quality Assurance

    • Raw Material Verification - Aluminum foil, fiberglass and PET composite materials are verified against the approved product construction and manufacturing requirements.

    • Lamination Quality Control - Lamination integrity and surface uniformity are checked to minimize delamination, wrinkles and localized defects.

    • Dimensional Inspection - Inside diameter, outside diameter, spread width and overlap requirements are checked against the specified tolerances.

    • Cutting and Appearance Inspection - Cut lengths and edge quality are verified, while surfaces are inspected for damage, contamination, excessive wrinkles and other visible defects.

    • Final Inspection and Traceability - Part numbers, dimensions, cut lengths, quantities, labels and packaging are verified before shipment.

     

    Frequently Asked Questions

    01.  What is GF-AS-N self-adhesive aluminum foil fiberglass sleeving used for?
    GF-AS-N is used to provide reflective thermal protection for cables and wire harnesses exposed to nearby heat sources. Its aluminum foil composite construction also supports applications where EMI/RFI shielding is a design consideration.
    02.  Can the sleeve be installed without removing cable connectors?
    No. The self-wrapping design allows the sleeve to be opened and fitted around existing cables without disconnecting connectors.
    03.  How does the aluminum foil surface provide thermal protection?
    The reflective aluminum foil surface helps reduce radiant heat transfer toward the protected cables. Actual performance depends on the heat source, exposure conditions and installation arrangement.
    04.  How do I choose the correct sleeve diameter?
    Measure the cable bundle outside diameter and select a suitable nominal size and spread width. Confirm that the sleeve maintains the required overlap without excessive tension after installation.

     

    Request a Sample or Quote

      Please share the cable bundle diameter, required sleeve length, operating temperature, distance from nearby heat sources, installation conditions and estimated order quantity. MJ FLEX can help evaluate suitable GF-AS-N sizes, wrapping coverage, cut lengths and packaging options, and provide samples or quotations based on your project requirements.

     

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