Intertape® – Electrical adhesive tapes Intertape® 4238

Intertape® 4238 has a laminate of polyester film and glass filaments as backing with acrylate adhesive.

Polyester film provides puncture resistance, abrasion resistance and resistance to edge tear. High tensile strength, conformable backing with aggressive adhesive for a variety of heavy duty insulating and holding applications. Very resistant to chemicals, solvents and aging, and offers excellent dielectric strength and insulation resistance.

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Lead and saddle tie down, banding and bundling motor and transformer coils and coil covering.


UL-File-No.: E20780
CSA-File: LR94980

Delivery forms

  • Width: from 2.5 mm in 0.1 mm increments
  • Core diameter: 76 mm (3")
  • Special widths on request








24 months at room temperature. Adhesive tapes should be stored in a cool, dry place at approx. 20 °C and 50 - 60 % relative humidity. The storage period should not exceed 24 months.

Technical data

Property Unit of measure  
Type/ Ordering information    Intertape® 4238
Standard colours    Transluzent
Backing    Polyester film + glass filament
Backing thickness  mm  0.165
Adhesive    Acrylate
Total thickness  mm  0.19
Dielectric strength  kV  6
Dielectric constant (AC, 23 °C, 50 Hz)    2.29
Elongation at break  7.5
Insulation resistance  MΩ  10^4
Electrolyt. corrosion value    Direct 1.0/A, 1
Flammability class    BU 2
Thermal class    155 °C (F)
Tensile strength  N/cm  657
Adhesiveness / Adhesion to steel  N/cm  4.9
UL FILE NO.    E20780