Product information

tesa 66440

490 μm d/s low Dk PU foam tape

Product description

tesa® 66440 is a double sided black PU foam tape with PET reinforcement. It consists of a super soft and compressible PU foam combined with high performance adhesive.
tesa® 66440 features:
  • All in one solution provided
  • Very low compression rebound force at Z direction
  • Quick rebounding
  • Low Dk at different frequency

Main applications

  • Low Dk property required application including FPC mounting
  • Cushioning and gap filling mounting application


Technical properties

Elongation at break

140 %

Type of liner


Color of liner


Tensile strength

95 N/cm

Total thickness

490 µm

Thickness of liner

50 µm

Backing material

PU foam



Adhesion properties

Adhesion to Steel (initial)

1.6 N/cm

Adhesion to PC (after 14 days)

1.6 N/cm

Adhesion to Steel (covered side, after 14 days)

9 N/cm

Adhesion to PC (covered side, after 14 days)

9 N/cm

Adhesion to Steel (covered side, initial)

9 N/cm

Adhesion to PC (covered side, initial)

8 N/cm

Adhesion to PC (initial)

1.4 N/cm

Adhesion to Steel (after 14 days)

1.6 N/cm

Rating properties

Static shear resistance at 23°C


Static shear resistance at 40°C


tesa® products prove their impressive quality day in, day out in demanding conditions and are regularly subjected to strict controls. All technical information and data above mentioned are provided to the best of our knowledge on the basis of our practical experience. They shall be considered as average values and are not appropriate for a specification. Therefore tesa SE can make no warranties, expressed or implied, including, but not limited to any implied warranty of merchantability or fitness for a particular purpose. The user is responsible for determining whether the tesa® product is fit for a particular purpose and suitable for the user’s method of application. If you are in any doubt, our technical staff will be glad to support you.

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