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.
Adhesive Type acrylic
Backing material foamed acrylic
Color deep black
Color of liner blue
Liner Type PE/PP protection film
Total thickness 1,200 µm
Type of adhesive to seal heat-activatable
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) 20.56 lbs/in
36 N/cm
Adhesion to Clear coat (after 20 min) 10.28 lbs/in
18 N/cm
Adhesion to Steel (initial) 20.56 lbs/in
36 N/cm
Adhesion to Steel (after 3 days) 20.56 lbs/in
36 N/cm
Adhesion to TPE (T-Peel, after 3 days warm / humid) 9.14 lbs/in
16 N/cm
Adhesion to TPE (T-Peel, after 3 days) 9.14 lbs/in
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® 52215 Ultra Low VOC tesa® 61053 tesa® Softprint 72426 FE tesa® 62508 tesa® ACXplus 77208 Base Line tesa® 62530 tesa® 64905 tesa® 4976 tesa® 66108 tesa® Softprint 52018 Steel Master
Total thickness
1,200 µm
150 µm
200 µm
550 µm
800 µm
800 µm
3,000 µm
500 µm
540 µm
800 µm
430 µm
Adhesive Type
acrylic
water-based acrylic
modified acrylic
tackified acrylic
tackified acrylic
pure acrylic
tackified acrylic
LSE
tackified acrylic
tackified acrylic
tackified acrylic
Backing material
foamed acrylic
non-woven
Acrylic
PE foam with film lamination
PE foam
foamed acrylic
PE foam
PE foam
PU foam
PE foam
PE foam with film lamination
Type of adhesive to seal
heat-activatable
Tensile strength
19 N/cm
10 N/cm
9.5 N/cm
13.3 N/cm
8 N/cm
6.66 N/cm
8 N/cm
Elongation at break
500 %
5 %
190 %
160 %
270 %
250 %
190 %
Color
deep black
translucent
black
black/white
gray
black/white
black
black
black
Last updated on May 31, 2024