3
Dual Lock™ Reclosable Fasteners
for Interior Applications
Product Selection Guide
General
Description
January 2013
3M™ Dual Lock™ Reclosable Fasteners are positive-locking, blind fasteners designed for
attaching automotive trim components. The products feature mushroom-shaped polyolefin
stems that snap together, forming a high tensile closure. Dual Lock fasteners are used
primarily to secure rigid and semi-rigid surfaces such as trim or door panels, instrument panel
bezels, headliners, and other automotive interior and exterior trim.
Dual Lock fasteners overcome the often difficult alignment and installation problems of
screws and hidden fasteners. They offer simple installation with no additional tools required.
Product
Features:
Easy Alignment of
Parts:
Reclosable:
Visibility:
Vibration
Resistance:
Ease of Assembly:
Mushroom heads allow flexibility in alignment for easy attachment of
components.
Can be opened and re-closed in high cycle applications.
Attaches on the backside of a trim piece, allowing for blind fastening and
an uninterrupted show surface.
Dramatically reduces the rattling and vibration of components.
Does not require any special tools or equipment; fasteners can be used to
attach components before they enter the final assembly plant, thus
reducing the number of parts and the length of assembly time.
Available in numerous forms, including multiple mechanical fastener
backed options, non-woven backed, pressure sensitive adhesive backed or
ultrasonic weldable. This provides the ability to attach to a variety of
surfaces, using different methods.
Combinations of stem densities and the engaged area provide adjustable
and proportional engagement and disengagement force.
Multiple
Attachment
Methods:
Adjustable
Engagement and
Disengagement
Forces:
Type 170
170 stems/inch
2
(26 stems/cm
2
)
Type 250
250 stems/inch
2
(39 stems/cm
2
)
Type 400
400 stems/inch
2
(62 stems/cm
2
)
Product Selection Guide
3M™ Dual Lock™ Reclosable Fasteners for Interior Applications
Page 2
Headliner Fasteners
Mating Surface:
Recommended
Part Selections:
Roof Interior / Sunroof
1. Slide-In (SJ3248, SJ3249)
2. Nonwoven (SJ3223, SJ3753)
3. Ultrasonically Bondable (SJ3799, SJ3766, SJ376)
4. Pressure Sensitive Adhesive (PSA)*(SJ3752, SJ3751,
SJ3781)
•
Easy to install,especially if already using a hot melt
process.
•
Excellent bonding to LSE substrates.
•
Reclosable.
•
Reduces rattling and vibration of components.
Headliner
1. PSA* (SJ3752, SJ3781, SJ3751)
2. Ultrasonically Bondable (SJ3799, SJ3766, SJ3768)
•
Low insertion force.
•
Reclosable.
•
Reduces rattling and vibration of components.
•
Attachment not affected by environmental conditions
(temperature, humidity, etc.)
Headliner
1. Pop-In (SJ3804, SJ3805, SJ3806)
•
•
•
•
Low insertion force.
Reclosable.
Reduces rattling and vibration of components.
Attachment not affected by environmental conditions
(temperature, humidity, etc.)
Benefits:
Roof/Headliner Applications
Sunroof Installation
Mating Surface:
Recommended
Part Selections:
Benefits:
Roof Interior
Mating Surface:
Recommended
Part Selections:
Benefits:
Door Panel Attachment
Mating Surface:
Recommended
Part Selections:
Benefits:
Trim Panels
1. Pop-In Family (SJ3804, SJ3805, SJ3806)
2. Rigid Back Parts (SJ3755)
3. PSA* (SJ3752, SJ3781, SJ3751)
•
Low insertion force.
•
Reclosable.
•
Reduces rattling and vibration of components.
•
Blind fastener with positive engagement feedback.
Sheet Metal /Pillar
1. Pop-In (SJ3804, SJ3805, SJ3806)
2. Rigid Back (SJ3755)
•
Easy to install.
•
Does not require modifications to trim panels.
•
Reclosable.
Door
Trim Attachment
Mating Surface:
Recommended
Part Selections:
Benefits:
Product Selection Guide
3M™ Dual Lock™ Reclosable Fasteners for Interior Applications
Page 3
Sheet Metal/Pillar
Mating Surface:
Recommended
Part Selections:
Benefits:
Trim Attachment
1. Pop-In (Tree Stem) (SJ3267, SJ3804, SJ3805,
SJ3806)
2. Rigid Back Parts (SJ3755)
•
Low insertion force.
•
Reclosable.
•
Reduces rattling and vibration of components.
•
Attachment not affected by environmental conditions
(temperature, humidity, etc.)
Interior Trim
1. Pop-In (SJ3804, SJ3805, SJ3806)
2. Rigid Back (SJ3755)
3. Slide-ins (SJ3248, SJ3249)
•
Low insertion force.
•
Reclosable.
•
Hidden fastener, good aesthetics
Center Console Panel Attachment
Mating Surface:
Recommended
Part Selections:
Benefits:
Glass
Mating Surface:
Recommended
Part Selections:
Benefits:
Various
1. PSA* (SJ3752, SJ3781, SJ3751)
•
•
Easy to install.
Strong enough to hold glass in place during assembly
while urethane sealant cures.
* Note: SJ3751 to SJ3751 engagement is considered a permanent/non-
reclosable bond.
Electronic Component Attachment
Mating Surface:
Recommended
Part Selections:
Benefits:
Various
1. Ultrasonic Bondable (SJ3799, SJ3766, SJ3768)
2. Slide-In (SJ3248, SJ3249)
3. PSA* (SJ3752, SJ3781, SJ3751)
•
Low insertion force.
•
Reclosable.
•
Reduces rattling and vibration of components.
•
Attachment not affected by environmental conditions
(temperature, humidity, etc.)
Interior
Load Floor
Load Floor
Mating Surface:
Recommended
Part Selections:
Benefits:
Flooring
1. Ultrasonic Bondable (SJ3799, SJ3766, SJ3768)
2. Slide-In (SJ3248, SJ3249)
3. PSA* (SJ3752, SJ3781, SJ3751)
•
Low insertion force.
•
Reclosable.
•
Reduces rattling and vibration of components.
•
Blind fastener with positive engagement feedback.
* Promoter may be required to certain plastics depending on strength of attachment needed. Please contact a 3M
technical service representative for a recommendation.
Product Selection Guide
3M™ Dual Lock™ Reclosable Fasteners for Interior Applications
Page 4
Contact
Information
Call 1-800-328-1684 for more information. The information provided in this technical
document is intended as a guide for this product. For more information and help in selecting a
3M product for an application, please contact a 3M technical service representative.
Technical Information:
The technical information, recommendations and other statements contained in this document are based
upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed.
Product Use:
Many factors beyond 3M’s control and uniquely within user’s knowledge and control can affect the use and
performance of a 3M product in a particular application Given the variety of factors that can affect the use and performance of a
3M product, user is solely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose and
suitable for user’s method of application.
Warranty, Limited Remedy, and Disclaimer:
Unless an additional warranty is specifically stated on the applicable 3M
product packaging or product literature, 3M warrants that each 3M product meets the applicable 3M product specification at the
time 3M ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE OR ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A
COURSE OF DEALING, CUSTOM OR USAGE OF TRADE. If the 3M product does not conform to this warranty, then the
sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or refund of the purchase price.
Limitation of Liability:
Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M
product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty,
contract, negligence or strict liability.
3
Automotive Division
3M Center, Building 223-1S-02
St. Paul, MN 55144-1000
www.3M.com/autosolutions
© 3M 2012
3M and Dual Lock are Trademarks of
3M Company.
Printed in U.S.A.
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