3M™ Dual Lock™ Reclosable Fastener SJ3540

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Black, interlocking mushroom-shaped heads (250 stem density per square inch) provide strong, reliable and durable fastening that can be opened and closed multiple times

Mates with Type 170, Type 250 or Type 400 stem densities to provide different strength combinations

Synthetic rubber-based adhesive bonds well to a variety of substrates including low surface energy plastics such as polyethylene and polypropylene

Overall Width (Imperial)

Overall Width (Metric)

Backing (Carrier) Material

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Details

Highlights

Black, interlocking mushroom-shaped heads (250 stem density per square inch) provide strong, reliable and durable fastening that can be opened and closed multiple times
Mates with Type 170, Type 250 or Type 400 stem densities to provide different strength combinations
Synthetic rubber-based adhesive bonds well to a variety of substrates including low surface energy plastics such as polyethylene and polypropylene
Strong fastener secures with an audible snap, verifying closure
An alternative to screws and bolts, this hidden fastener provides a snug fit and smooth aesthetic appearance
Features good temperature resistance of 120°F (49°C)
Best suited for indoor use

3M™ Dual Lock Reclosable Fastener SJ3540 is the easy and clear alternative to traditional fastening methods, such as screws, nuts or bolts. It is designed to deliver a durable, reclosable fastening solution (which can be opened and closed multiple times) which bonds to a variety of substrates including many plastics and low surface energy materials. Durable and secure, 3M Dual Lock Reclosable Fastener SJ3540 has exceptional strength through its interlocking mushroom-shaped heads (250 stem density per square inch), providing up to 5X the tensile strength of typical hook-and-loop products. We designed this fastener with a synthetic rubber-based black PE foam tape protected by a removable, film liner. This pressure sensitive adhesive features quick stick and a short dwell time. With 3M™ Dual Lock Reclosable Fastener SJ3540, there is no need for any drilling, screwing or sewing tools which makes for quick installation.

Unlock Simplicity
Durable and secure, 3M™ Dual Lock™ Reclosable Fastener SJ3540 has exceptional strength through its interlocking mushroom-shaped heads (250 stem density per square inch), providing up to 5X the tensile strength of typical hook-and-loop products. We designed this fastener with a synthetic rubber-based black PE foam tape protected by a removable, film liner. This pressure sensitive adhesive features quick stick and a short dwell time. With 3M™ Dual Lock™ Reclosable Fastener SJ3540, there is no need for any drilling, screwing or sewing tools which makes for quick installation.

3M™ Dual Lock™ Reclosable Fastener SJ3540 has exceptional strength through its interlocking mushroom-shaped heads (250 stem density per square inch), providing up to 5X the tensile strength of typical hook-and-loop products.

3M™ Dual Lock™ Reclosable Fasteners are available in three stem densities to customize for the strength requirements of your project

Recommended Applications:

Access panels
Interior signage
Decorative trim
Office partitions
Product IDs

Design Flexibility
3M™ Dual Lock™ Reclosable Fastener SJ3540 consists of interlocking mushroom-shaped heads that easily slide over each other, allowing for positioning of parts before being snapped together. This fastening process creates a durable attachment and provides fast product assembly with great design flexibility. Our reclosable fasteners can also engage with different stem densities for varying levels of strength and system performance.

3M™ Dual Lock™ Reclosable Fasteners sound an audible snap when secure, which verifies closure of the attachment. To disengage, simply peel the pieces apart by hand. Our fasteners maintain their strength throughout multiple attachments and detachments. A lightweight alternative to metal fasteners, this product remains hidden beneath surfaces and does not interfere with the integrity of your material—providing aesthetic improvements and design flexibility.

Hundreds of Reattachments in a Snap
When two pieces of 3M™ Dual Lock™ Reclosable Fasteners mate, the stems flex and the mushroom heads slide past each other. After passing the opposing mating piece, the stems snap back into their original position and the opposing mushroom heads interlock. These fasteners can provide high tensile strength but can be opened by simply cleaving or peeling open the closure. This product is well suited for many indoor applications where a good performance, high strength, reclosable fastening system is required.

Delivers Long-Lasting Performance
Not all design requirements are easily satisfied, but you can simplify your attachments. When you need a strong, reliable, yet removable closure, 3M™ Dual Lock™ Reclosable Fasteners are the easy alternative to traditional fastening methods such as screws, nuts or bolts.

Typical properties

Details

Adhesive Color	Black
Adhesive Type	Synthetic Rubber
Application	Interior Mirror & Fixture Attachment, Mounting & Trim Attachment, Upholstery & Seating Attachment, Wall Headliner Attachment, Wall Panel Attachment, Wood Blinds Trim Attachment, Attaching Graphics, Kiosk Assembly, Sensor Attachment, Mounting RV Accessories, Guitar Pedal Board Assembly, Point of Sales System Attachment, Mounting Surveillance Cameras, Power Strip Attachment, Panel Attachment Systems
Backing (Carrier) Material	Polypropylene, Polyolefin
Brands	Dual Lock™
Closure Life	1000
Engaged Thickness (Imperial)	0.23 in
Engaged Thickness (Metric)	5.8 mm
Flame Retardant	No
Indoor/Outdoor	Indoor
Industries	Furniture, General Industrial, Packaging, Construction, Retail, Electronics, MRO
Maximum Operating Temperature (Celsius)	49 ℃
Maximum Operating Temperature (Fahrenheit)	120 ℉
Primary Liner	White Polyolefin
Primary Liner Color	White
Primary Liner Thickness (Imperial)	5 mil
Primary Liner Thickness (Metric)	0.13 mm
Product Color	Black
Product Form	Roll
Smallest Saleable Unit	Roll
Stem Density	250
Units per Case	1.0, 2.0, 4.0

Dimensions and Classifications

Overall Length (Imperial)	50 yd
Overall Length (Metric)	45.72 m
Overall Width (Imperial)	0.5 in, 0.75 in, 1 in, 1.5 in, 2 in, 3 in, 6 in
Overall Width (Metric)	12.7 mm, 19.05 mm, 25.4 mm, 38.1 mm, 50.8 mm, 76.2 mm, 152.4 mm

Resources

3M™ Dual Lock™ Reclosable Fasteners SJ3540, SJ3541, and SJ3542

Regulatory Data Sheet

Document Number: MSDS_2044675_US_EN_RDS

(PDF)

Reviews

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	Current product 3M™ Dual Lock™ Reclosable Fastener SJ3540	3M™ Dual Lock™ Reclosable Fastener SJ3561	3M™ Dual Lock™ Reclosable Fastener SJ3551CF	3M™ Dual Lock™ Reclosable Fastener SJ3441
Overall Width (Metric)	12.7 mm, 19.05 mm, 25.4 mm, 38.1 mm, 50.8 mm, 76.2 mm, 152.4 mm
Product Form	Roll
Overall Width (Imperial)	0.5 in, 0.75 in, 1 in, 1.5 in, 2 in, 3 in, 6 in
Backing (Carrier) Material	Polypropylene, Polyolefin
Product Color	Black
Adhesive Type	Synthetic Rubber

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3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice. Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage. For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.