tesa® ACXplus 74712 Seal Line

1.2 mm heat activatable acrylic foam tape for mounting of demanding seal applications such as door seals


Product Features
  • Efficient and secure bonding of the heat-activatable layer to seals
  • Application on clearcoats without primer
  • Final peel adhesion reached after 24 h
All product features
Product description

tesa® ACXplus 74712 Seal Line is a deep black acrylic foam tape for permanent mounting of seals, mainly on automotive clearcoat. It has a heat-activatable adhesive on the non-liner side. The adhesive gets activated by hot air or near-infrared when applying it onto the PP/EPDM, PP, TPV, or TPE seal.
Compared to the conventional process with primer, tesa® ACXplus 74712 Seal Line ensures a highly secure bond to the rubber profile, enables a higher application speed than using primer, and improves the operational safety during the production process.
By introducing a functional layer at the liner side, tesa® ACXplus 74712 can be used on various automotive clearcoats even without the use of adhesion promoters. The acrylic foam core ensures outstanding dimensional stability even at high temperatures and loads. At the same time, by its viscoelastic properties, tesa® ACXplus 74712 Seal Line absorbs and dissipates dynamic and static loads. This also allows compensation of extreme physical stress caused by the different thermal elongation of bonded parts in rapidly changing temperatures.
The deep black color provides an enhanced appearance and high design flexibility.


Product details and specifications

Product Features

  • Efficient and secure bonding of the heat-activatable layer to seals
  • Application on clearcoats without primer
  • Final peel adhesion reached after 24 h
  • Enhanced temperature resistance
  • Robust shear performance even at high temperatures
  • PFAS / PFOS free product
  • Strong bonding of the heat-activatable layer to acrylic core that withstands even humidity and heat
  • Closed cell acrylic foam core for reliable sealing to prevent water penetration
  • High humidity and UV resistance
  • Excellent cold shock performance

Application Fields

tesa® ACXplus 74712 Seal Line can be widely used for all kinds of automotive seal applications within a temperature range of -40 °C to 90 °C.
Backing material foamed acrylic
Colour deep black
Colour of liner blue
Total thickness 1,200 µm
Type of adhesive acrylic
Type of adhesive to seal heat-activatable
Type of liner PE/PP protection film
Elongation at break 500 %
Tensile strength 19 N/cm
Humidity resistance very good
Ageing resistance (UV) very good
Adhesion to Clear coat (covered side, after 3 days) 36 N/cm
Adhesion to Clear coat (after 20 min) 18 N/cm
Adhesion to Steel (initial) 36 N/cm
Adhesion to Steel (after 3 days) 36 N/cm
Adhesion to TPE (T-Peel, after 3 days warm / humid) 16 N/cm
Adhesion to TPE (T-Peel, after 3 days) 16 N/cm
  • PV29 = filmic liner in royal blue, siliconized to adhesive side and silicone free to tabbing side, works with both heat and adhesive tabbing tapes. Liner removal force <=100 cN/cm.
  • Adhesion to steel and tesa standard clearcoat: measured at 90°, 300mm/min, tape reinforced with aluminium foil
  • T-Peel test: heat-activatable adhesive to standard TPE seal, 300 mm/min
  • Warm/humid storage: 72 h at 40°C and 100% r.h.
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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Product comparison

Name of product tesa® ACXplus 74712 Seal Line tesa® ACXplus 74508 Seal Line tesa® ACXplus 73808 Seal Line tesa® 52215 tesa® ACXplus 73608 Seal Line tesa® ACXplus 7805 Black Line tesa® ACXplus 7255 Multi Purpose (MP) tesa® ACXplus 7254 Multi Purpose (MP) tesa® ACXplus 7046 tesa® ACXplus 7076 High Resistance tesa® ACXplus 7054 High Transparency
Total thickness
1,200 µm
0.8 mm
800 µm
150 µm
800 µm
500 µm
1,000 µm
500 µm
1,500 µm
1,500 µm
500 µm
Type of adhesive
acrylic
modified acrylic
specialty
water-based acrylic
acrylic
modified acrylic
pure acrylic
pure acrylic
pure acrylic
pure acrylic
pure acrylic
Backing material
foamed acrylic
foamed acrylic
Acrylic foam
non-woven
Acrylic foam
foamed acrylic
solid acrylic
solid acrylic
filled acrylic
foamed acrylic
solid acrylic
Type of adhesive to seal
heat-activatable
heat-activatable
heat-activatable
acrylic
Tensile strength
19 N/cm
30 N/cm
19 N/cm
10 N/cm
3.6 N/cm
Elongation at break
500 %
400 %
500 %
5 %
500 %
1,400 %
Colour
deep black
deep black
grey
translucent
grey
deep black
transparent
transparent
black
transparent
Last updated on 13 Apr 2026