Dual Lock™ Reclosable
Fastener SJ3550
Product Data Sheet
January 2017
Supersedes: October 2016
acrylic pressure sensitive adhesive.
• Durable for indoor and outdoor applications
Product Description
Key Features
Physical Properties
3M™ Dual Lock™ Reclosable Fastener SJ3550 is a general
purpose black reclosable fastener with 250 stems per square inch.
This black fastener has mushroom shaped stems on a
polypropylene carrier, which is coated with a white, general purpose
• General purpose acrylic adhesive bonds to medium to high
surface energy substrates (e.g. metal, ABS)
• Stem density: 250 stems/in²
• Closure cycle life > 1 000
• Mushroom shaped stems snap in place to ensure fastener is
engaged
• Good aging performance and resistance against humidity
• Good initial adhesion
• Quick and easy to install
Type SJ3550
Adhesive Type
Acrylic adhesive
Tape Colour White
Backing Black polypropylene
Stems Black polypropylene
Release Liner 3M branded filmic liner
Engaged Thickness
acc. DIN EN 1942: 2008
5.4 mm
Dual Lock™ Reclosable Fasteners SJ3550
January 2017
Performance Characteristics
Type SJ3550
90 ° Peel adhesion to Stainless Steel
acc. to ISO 29862:2007, 90 ° peel angle @ RT,
after 72h @ RT dwell
25 N/cm
90 ° Peel adhesion to PP
acc. to ISO 29862:2007, 90 ° peel angle @ RT,
after 72h @ RT dwell
90 ° Peel adhesion to ABS
acc. to ISO 29862:2007, 90 ° peel angle @ RT,
after 72h @ RT dwell
4 N/cm
30 N/cm
90 ° Peel adhesion to Stainless Steel
acc. to ISO 29862:2007, 90 ° peel angle @ RT,
after 72h @ RT dwell and after 10d @ 38 °C & 98 % rH
Dyn. Tensile Engagement Strength
acc. to ASTM D897-08, tested @ RT
23 N/cm
113 N/in²
Dyn. Tensile Disengagement Strength
acc. to ASTM D897-08, tested @ RT
Dyn. Tensile Disengagement Strength
acc. to ASTM D897-08, tested @ 70 °C
Dynamic Shear – Max. Force
acc.ISO 29863:2007 to stainless steel
Dynamic Shear – Elongation
acc.ISO 29863:2007 to stainless steel
Static Shear Strength Stainless Steel
ISO 29863:2007, after 72h @ RT dwell
(Holds minimum 77.5 g/cm² for 10.000 minutes)
„T“ Peel (flexible to flexible)
acc. ISO 29862:2007
231 N/in²
56 kPa
102 kPa
60 %
23 °C – 500 g
70 °C – 500 g
53 N/cm
Dual Lock™ Reclosable Fasteners SJ3550
Address correspondence to: 3M
result of our recommendations
3M is a trademark of the 3M Company.
3M United Kingdom PLC
United Kingdom
3M Svenska AB
Sweden
3M Eesti OÜ
Estonia
3M Ireland Ltd
Ireland
3M a/s
Denmark
3M Latvia SIA
Latvia
3M Belgium bvba/sprl
Belgium
3M Norge AS
Norway
3M Lietuva UAB
Lithuania
3M Nederland B.V.
Suomen 3M Oy
January 2017
Storage & Shelf Life
For Additional Information
Important Notice
Store at 16 °C – 25 °C and 40 – 65 % relative humidity in its original
box. The product can be stored up to 24 months after production.
Note: The shelf life may be shortened if the original packaging is
not properly sealed or stored in an environment with high
temperatures or humidity.
To request additional product information or to arrange for sales
assistance, call……
All statements, technical information and recommendations
contained in this document are based upon tests or experience that
3M believes are reliable. However, many factors beyond 3M’s
control can affect the use and performance of a 3M product in a
particular application, including the conditions under which the
product is used and the time and environmental conditions in which
the product is expected to perform. Since these factors are uniquely
within the user’s knowledge and control, it is essential that the user
evaluate the 3M product to determine whether it is fit for a particular
purpose and suitable for the user’s method or application. All
questions of liability relating to this product are governed by the
terms of the sale subject, where applicable, to the prevailing law.
Values presented have been determined by standard test methods and are average values not to be used for
specification purposes. Our recommendations on the use of our products are based on tests believed to be
reliable but we would ask that you conduct your own tests to determine their suitability for your applications. This
is because 3M cannot accept any responsibility or liability direct or consequential for loss or damage caused as a
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