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Product

Hook-up & equipment wiresSAE J1128 GXL · ISO 6722 Class CHeavy-Duty Wall + Water Block−40…+125 °C · 20–8 AWG

GXL Anti-Capillary Water-Blocked Automotive WireSAE J1128 GXL 125 °C heavy-wall XLPE truck & chassis wire with anti-capillary water block

Heavy-duty longitudinally water-blocked automotive and truck primary wire built to SAE J1128 Type GXL and ISO 6722-1 Class C (−40 °C to +125 °C, 60 V DC), combining a thicker 0.58–0.94 mm XLPE wall with an interstitial anti-capillary strand seal (20–8 AWG).

Oil-resistant
Water-resistant
Ozone, UV & moisture
Approved
Order designation
GXL Anti-Capillary 16 AWG (19/29)
Outer Ø min
2.4 mm
Outer Ø max
2.6 mm
Weight ≈
16 kg/km
Min. bend R
11 mm
Check against my drumAll sizes (7)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Voltage rating
60 V DC / 25V AC
SAE J1128 & ISO 6722-1 low-tension
Temp. rating
−40…+125 °C
ISO 6722-1 Class C (3,000 h at +125 °C)
Water blocking
0 ml wicking
Longitudinal interstitial strand seal
Insulation wall
0.58–0.94 mm
SAE J1128 GXL medium-thin wall XLPE
Bending radius
3–4 × OD
3–4 × overall diameter chassis routing
Size range
20–8 AWG
0.50–8.0 mm² · bare or tinned copper

Typical values for this cable type, based on SAE J1128 Type GXL · ISO 6722-1 Class C (+125 °C) — confirmed in the datasheet and quotation for your order.

Application fit

Is GXL Anti-Capillary right for your machine?

While passenger cars use ultra-thin TXL, heavy-duty Class 8 trucks, agricultural tractors, construction excavators and buses specify SAE J1128 GXL for its ~45 % thicker XLPE wall and compatibility with Deutsch / Ampseal heavy-duty connector grommets. GXL Anti-Capillary adds full longitudinal water blocking.

Fixed installation

Suitable

Heavy-duty truck, bus, tractor and excavator frame-rail harnesses, ABS/EBS modulators and diesel ECUs.

VFD inverter to AC motor screened feeder

Not suitable

Unscreened 60 V DC low-tension commercial vehicle primary wire.

Use UL 2464 / 2517

Trailing & towing

Not suitable

Vehicle chassis harness wire; for compact passenger-car ECU cavities select TXL Anti-Capillary.

Use TXL Anti-Capillary

Energy chain / drag chain

Not suitable

For +180 °C immersion in gearbox ATF or turbo engine bays, select EXRAD 180B.

Use EXRAD 180B (+180 °C)
Typical machinesClass 8 heavy-duty truck & trailer frame harnessesConstruction, mining & agricultural off-highwayDiesel aftertreatment (DEF/SCR/NOx) & engine ECUsPneumatic ABS / EBS brake modulator leadsMarine, RV & municipal utility vehicle looms

Construction

Layer by layer

Shown: GXL Anti-Capillary 16 AWG (19/29) — 19-strand bare or tinned annealed copper conductor filled with cured interstitial water-blocking elastomer and insulated with a 0.58 mm (23 mil) SAE J1128 GXL cross-linked polyethylene (XLPE) wall.

123
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Water-blocked 19/37-strand copperConcentric 19- or 37-strand bare or tinned annealed copper (20–8 AWG) with cured interstitial anti-capillary elastomerSAE J1128 · ASTM B3 / B33
20.58–0.94 mm GXL cross-linked XLPEGeneral-purpose thin-wall electron-beam cross-linked polyethylene (0.58 mm on 20–14 AWG vs 0.40 mm on TXL) for extra rock/chafe protectionSAE J1128 Type GXL · ISO 6722-1 Class C
3Heavy-duty connector-seal XLPE surfaceRound outer diameter sized specifically to compress heavy-duty Deutsch DT/HD, Metri-Pack and Ampseal silicone wire sealsSAE J1128 · SAE J2030

GXL Anti-Capillary Bare Copper (20–8 AWG, −40…+125 °C)

Standard bare copper strands with interstitial water block and GXL wall for commercial truck and off-highway OEMs

GXL Anti-Capillary Tinned Copper (20–8 AWG, −40…+125 °C)

Tinned copper strands with interstitial water block for municipal salt-spreader trucks, marine trailers and mining fleets

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on SAE J1128 Type GXL · ISO 6722-1 Class C (+125 °C). Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage
60 V DC / 25 V AC (low-tension commercial vehicle primary)
Dielectric withstand voltage
1.0 kV AC for 1 min (wet) · 5.0 kV spark test
Max. DC conductor resistance (20 °C)
20 AWG: ≤ 34.6 Ω/km · 18 AWG: ≤ 21.8 Ω/km · 16 AWG: ≤ 14.0 Ω/km · 14 AWG: ≤ 8.79 Ω/km · 12 AWG: ≤ 5.56 Ω/km · 10 AWG: ≤ 3.55 Ω/km · 8 AWG: ≤ 2.15 Ω/km

Thermal

Operating temperature range
−40 °C to +125 °C continuous (ISO 6722-1 Class C)
Short-term overload & solder heat
+150 °C (240 h) · +250 °C short-circuit resist

Mechanical

Nominal insulation wall
20–16 AWG: 0.58 mm (23 mil) · 14 AWG: 0.60 mm · 12 AWG: 0.66 mm · 10 AWG: 0.79 mm · 8 AWG: 0.94 mm
Abrasion & pinch resistance
~45 % thicker XLPE wall than TXL provides markedly higher sandpaper/scrape abrasion cycles on exposed chassis rails
Anti-capillary performance
0 ml longitudinal water transmission across conductor interstices under pressure differential testing

Resistance

Commercial vehicle fluids
Resists diesel fuel, DEF/AdBlue (32.5 % urea), engine oil, hydraulic fluid, road de-icing brines and steam washing
Flame retardance
Passes SAE J1128 45° burn test and ISO 6722-1 flame propagation test

Reference standards

Primary standard
SAE J1128 Type GXL (General Purpose Thin-Wall Cross-Linked Polyolefin Insulated)
Heavy-duty & OEM alignment
ISO 6722-1 Class C, SAE J2202, Cummins, Caterpillar, John Deere & Paccar harness standards
RoHS, ELV & REACH
2000/53/EC (ELV), 2011/65/EU (RoHS 2) & IMDS registered

Identification

Insulation colours
Black, Red, Blue, Yellow, Green, Brown, Orange, White, Violet, Grey & striped tracers
Customs tariff (HS)
8544.49 (insulated conductors ≤ 1000 V)

Sizes

7 standard GXL Anti-Capillary configurations

Typical SAE J1128 Type GXL · ISO 6722-1 Class C (+125 °C) outer diameter limits, copper content and cable weight.

Dimensions & weights
Order designationCores × mm² / AWGAWG ≈Outer Ø min
mm		Outer Ø max
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
mm		Enquiry
SAE J1128 GXL 125 °C Anti-Capillary Heavy-Duty Wire (20–8 AWG)
GXL Anti-Capillary 20 AWG (19/32)20 AWG (0.50 mm²)202.02.1589
GXL Anti-Capillary 18 AWG (19/30)18 AWG (0.80 mm²)182.22.471210
GXL Anti-Capillary 16 AWG (19/29)16 AWG (1.25 mm²)162.42.6121611
GXL Anti-Capillary 14 AWG (19/27)14 AWG (2.00 mm²)142.93.1192512
GXL Anti-Capillary 12 AWG (19/25)12 AWG (3.00 mm²)123.43.7313915
GXL Anti-Capillary 10 AWG (19/23)10 AWG (5.00 mm²)104.24.5506018
GXL Anti-Capillary 8 AWG (19/21)8 AWG (8.00 mm²)85.25.6809622
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Dimensions and weights are typical values per SAE J1128 Type GXL · ISO 6722-1 Class C (+125 °C). Minimum fixed bending radius shown is 4 × OD.

Reel check

Will it fit your machine?

A first screen using datasheet values. Engineering confirms drum geometry, acceleration and tension with your quotation.

Check results

Drum core 300 mm ≥ 20 mmBending radius OK (4 × OD 2.6 mm)
Minimum bending radius
10 mm
Min. drum core diameter
≈ 20 mm
Cable weight on drum
0.8 kg
Copper content
0.6 kg
Indicative only: based on the datasheet outer diameter and 4 × OD bending radius. Current derating for wound layers per DIN VDE 0298-4 is assessed separately.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
AC dielectric voltage test1.0 kV AC (50/60 Hz)Every manufactured length
Conductor DC resistanceIEC 60228 / ASTM (bare copper)Every manufactured length
Sample tests
Flame propagation testIEC 60332-1-2 / UL VW-1 / ISO 6722-1Per production batch
Insulation & sheath material physical propertiesSAE J1128 Type GXL · ISO 6722-1 Class C (+125 °C)Type approval

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

SAE J1128 Type GXL · ISO 6722-1 Class C (+125 °C)CE · RoHS 2 (2011/65/EU) · REACH

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

SAE J1128 GXL [AWG] ANTI-CAPILLARY 125C TEBAOFLEX
Delivery form
Export wooden drums, reels or coils, cut-to-length on request
Packaging
Heat-treated ISPM-15 timber drums or spools with sealed ends
Conductor / colour options
Custom core counts, stripe combinations or cut harnesses on request

Technical documents

Downloads

PDFGXL Anti-Capillary Water-Blocked Automotive Wire – technical datasheet7 sizes · construction, technical data, approvalsXLSXGXL Anti-Capillary spec data (Excel)All 7 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What is the exact dimensional difference between SAE J1128 GXL and TXL?
At 18 AWG, TXL has a 0.40 mm (16 mil) nominal XLPE wall and ~2.05 mm outer diameter, whereas GXL has a 0.58 mm (23 mil) nominal XLPE wall and ~2.40 mm outer diameter. That extra 0.35 mm of diameter ensures a watertight radial compression fit inside standard heavy-duty truck and off-highway connector grommets (such as Deutsch DT and Metri-Pack 150/280).
Why is longitudinal water blocking critical on commercial trucks and agricultural machinery?
Frame-rail harnesses on trucks, tractors and excavators are exposed to high-pressure washdowns, flooded work sites, DEF/urea crystallization and road salt. If a splice or tail-lamp pigtail is breached, capillary action can wick brine metres up the harness into the engine ECM or ABS modulator unless the conductor strands are internally blocked.
Can GXL Anti-Capillary be processed on standard Komax / Schleuniger machines?
Yes. The cured interstitial elastomer remains inside the conductor strand bundle and strips cleanly with standard V- or radius-blades without gumming up tooling.
What if the harness runs inside the transmission pan or next to a turbocharger above +125 °C?
For continuous temperatures up to +180 °C and direct immersion in hot automatic transmission fluid (ATF), select EXRAD 180B Anti-Capillary.

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GXL Anti-Capillary Water-Blocked Automotive Wire

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Reel & motion:
- Reel type: 
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