LSE-Optimized Adhesion: Bonds reliably to PP, PE, and EPDM—no primer needed.
High Shear Strength: Holds strong under stress and heat for long-term durability.
Dimensional Stability: PET backing ensures clean handling and precise die-cuts.
All product featuresProduct description
tesa® 4950 is a high-performance, double-sided transparent PET film tape designed for reliable bonding on low surface energy (LSE) substrates. With a total thickness of 100µm and a 12µm PET backing made from 90% post-consumer recycled content, it combines sustainability with technical excellence. The tackified acrylic adhesive ensures strong initial tack and superior shear strength, even under demanding environmental conditions.
Product details and specifications
Product Features
LSE-Optimized Adhesion: Bonds reliably to PP, PE, and EPDM—no primer needed.
High Shear Strength: Holds strong under stress and heat for long-term durability.
Dimensional Stability: PET backing ensures clean handling and precise die-cuts.
Thermal Resistance: Withstands short-term exposure up to 200°C.
Low VOC: Tested to VDA 278 for cleaner indoor air.
Application Fields
Versatile bonding solution for a wide range of demanding industrial applications
Enables primerless adhesion to low surface energy (LSE) substrates such as PP, PE, and EPDM
Ideal for long-term mounting on hard-to-bond materials, including gaskets and molded components
For industrial assembly where clean aesthetics, dimensional stability, and transparent bonding are critical
Sustainable Aspects
90% PCR PET in the backing
Responsibly sourced paper liner (certified)
Product Construction
Adhesive Type
tackified acrylic
Backing material
Post consumer recycled PET
Color
transparent
Color of liner
brown/blue logo
Thickness of liner
69 µm
Total thickness
100 µm
Weight of liner
80 g/m²
Product Construction
Adhesive Type
tackified acrylic
Backing material
Post consumer recycled PET
Color
transparent
Color of liner
brown/blue logo
Thickness of liner
69 µm
Total thickness
100 µm
Weight of liner
80 g/m²
Properties / Performance Values
Elongation at break
50 %
Tensile strength
20 N/cm
Temperature resistance short term
200 °C
Softener resistance
very good
Static shear resistance at 40°C
very good
Static shear resistance at 23°C
very good
Temperature resistance long term
100 °C
Tack
very good
Chemical Resistance
good
Humidity resistance
very good
Temperature resistance min.
-40 °C
Ageing resistance (UV)
good
Static shear resistance at 70°C
very good
Properties / Performance Values
Elongation at break
50 %
Tensile strength
20 N/cm
Temperature resistance short term
200 °C
Softener resistance
very good
Static shear resistance at 40°C
very good
Static shear resistance at 23°C
very good
Temperature resistance long term
100 °C
Tack
very good
Chemical Resistance
good
Humidity resistance
very good
Temperature resistance min.
-40 °C
Ageing resistance (UV)
good
Static shear resistance at 70°C
very good
Adhesion to Values
Adhesion to PC (initial)
7 N/cm
Adhesion to PE (initial)
5 N/cm
Adhesion to PP (initial)
6.6 N/cm
Adhesion to Steel (initial)
7.5 N/cm
Adhesion to Values
Adhesion to PC (initial)
7 N/cm
Adhesion to PE (initial)
5 N/cm
Adhesion to PP (initial)
6.6 N/cm
Adhesion to Steel (initial)
7.5 N/cm
Additional Info
Liner variants:
PV04: white PE-coated liner (126µm; 126 g/m²)
PV20: branded brown glassine paper (69μm; 80g/m²)
Low VOC – measured according to VDA 278 analysis, tesa® 4950 does not contain any single substances restricted by the drafted GB regulations (China).
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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