Isotape® – Electrical adhesive tapes Isotape® 4239

Isotape® 4239 is a fibreglass reinforced polyester tape with a pressure sensitive acrylate adhesive.

Download datasheet

Delivery forms

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




Pressure sensitive acrylate




6 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 6 months.

Punched parts, bent & formed parts

We offer a wide range of punched and formed parts: Rolls, individual parts unsorted, sorted or stacked, adhesive on one or both sides, non-adhesive, with or without a grip tab.


More about punched parts

Technical data

Property Unit of measure
Type/ Ordering information Isotape® 4239
Standard colours Translucent
Backing Glass fiber reinforced polyester
Adhesive Pressure sensitive acrylate
Total thickness mm 0.180
Elongation at break % 10
Thermal class 155 °C (F)
Dielectic strength kV 6
Adhesiveness / Adhesion to steel N/cm 4.68
Tensile strength N/cm 392
Backing thickness mm 0.130