tesa® 54321

Precision die cuts for permanent hole covering of venting holes

Product description

tesa® 54321 is a thick PET-fleece with acrylic adhesive. This product is optimized for the automotive industry to covers venting holes.
The product is designed as a die cut, where the inner ring zone is adhesive free to generate the venting effect. The outer ring zone is coated with a high adhesion adhesive.

tesa® 54321 prevents the PU-foam from oozing out during the infusion process and allows the suppressed air to flow through the fleece backing to reduce cleaning and rework.

Main applications

tesa® 54321 venting tape covers holes to avoid the squeezing out of the PU-foam during the infusion and foaming process, but to allow air flow and thereby avoid excess pressure.
Expanding PU-foams are often used to improve NVH (noise, vibration, harshness) and stiffness to provide local reinforcement to body structures for crash and energy management.

Technical properties

Backing material

PET fleece



Total thickness

27.16 mils

Type of adhesive

tackified acrylic

Adhesion to Steel (initial)

77.65 oz/in

Type of liner


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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