tesa® 4950 - LSE Filmic Mounting Tape

100µm LSE double-sided transparent PET film tape

Sustainable Aspects

90% PCR PET in the backing
Responsibly sourced paper liner (certified)

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.

All product features

Product 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 (3.9 mils) and a 12µm (0.47 mils) 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.
UL Certification: In accordance with UL standard 969. UL file: MH 18055.

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)

Adhesive Type	tackified acrylic
Backing material	Post consumer recycled PET
Color	transparent
Color of liner	brown/blue logo
Thickness of liner	2.72 mils 69 µm
Total thickness	100
Weight of liner	113.79 lbs/in² 80 g/m²

Elongation at break	50 %
Tensile strength	20
Temperature resistance short term	392 °F 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	212 °F 100 °C
Tack	very good
Chemical Resistance	good
Humidity resistance	very good
Temperature resistance min.	-40 °F -40 °C
Ageing resistance (UV)	good
Static shear resistance at 70°C	very good

Adhesion to PC (initial)	4 lbs/in 7 N/cm
Adhesion to PE (initial)	2.86 lbs/in 5 N/cm
Adhesion to PP (initial)	3.77 lbs/in 6.6 N/cm
Adhesion to Steel (initial)	4.28 lbs/in 7.5 N/cm

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.

Downloads

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Product information_tesa® 04950_en-US 106.2 kB

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Product comparison

Name of product	tesa® 4950 - LSE Filmic Mounting Tape	tesa® 51865 - Team 4965 Differential	tesa® 4965 Original Next Gen	tesa® 51962	tesa® 51964	tesa® 88665	tesa® 4970	tesa® 4968	tesa® 51903	tesa® 61970	tesa® 59652 - Team 4965 Black
Total thickness	100	165 µm	205 µm	50 µm	125 µm	115 µm	225 µm	295 µm	86 µm	220 µm	205 µm
Adhesive Type	tackified acrylic	tackified acrylic	biomass-balanced tackified acrylic	tackified acrylic	tackified acrylic		tackified acrylic	tackified acrylic	acrylic	tackified acrylic	tackified acrylic
Backing material	Post consumer recycled PET	PET film	Post consumer recycled PET	PET	PET film	PET	PVC film	PVC film	PVC film	PP film	PET film
Adhesion to Steel (initial)	7.5 N/cm	9.6 N/cm	11.5 N/cm	5 N/cm	11.2 N/cm	6.9 N/cm	13 N/cm	12.5 N/cm	2.4 N/cm	13 N/cm	11.5 N/cm
Color	transparent	transparent	transparent	transparent	transparent	transparent	white	white	transparent	transparent	black