3M Dual Lock Reclosable Fastener SJ3540, Black, Type 250, 1 in x 50 yd, 2 Roll/Case

• An alternative to screws and bolts, this hidden fastener provides a snug fit and smooth aesthetic appearance
• Best suited for indoor use
• 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
• Features good temperature resistance of 120°F (49°C)
• Mates with Type 170, Type 250 or Type 400 stem densities to provide different strength combinations
• Strong fastener secures with an audible snap, verifying closure
• Synthetic rubber-based adhesive bonds well to a variety of substrates including low surface energy plastics such as polyethylene and polypropylene

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.

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.

Trusted 3M Dual Lock

The 3M Dual Lock Reclosable Fastener SJ3540 offers a reliable fastening solution from a trusted brand. This model features black, interlocking mushroom-shaped heads with a stem density of 250 per square inch, ensuring a strong and durable hold. It’s designed to replace screws and bolts for a cleaner look.

Ideal for indoor use, this fastener provides a snug fit and smooth aesthetic appearance. Its unique design allows it to be opened and closed multiple times without losing strength, making it perfect for applications where repeated access is needed.

Durable Size And Format

This product comes in a 1 inch by 50 yard roll format, supplied as 2 rolls per case. The size and format make it easy to apply over large areas or cut to fit specific needs. The black color blends well with many surfaces, maintaining a discreet look.

The pressure-sensitive adhesive backing bonds well to various substrates, including low surface energy plastics like polyethylene and polypropylene. This ensures a secure attachment across different materials without the need for drilling or screwing.

Strong Reclosable Fastening

The SJ3540 fastener provides up to five times the tensile strength of typical hook-and-loop products. Its interlocking mushroom heads snap together with an audible click, confirming a secure closure. This feature helps users know when the fastener is properly engaged.

Because it can be opened and closed repeatedly, it’s suitable for applications like access panels, interior signage, and office partitions. The fastener’s design allows for quick assembly and disassembly without tools, saving time and effort.

Flexible Design Compatibility

This fastener mates with other 3M Dual Lock types such as Type 170 and Type 400, allowing different strength combinations. The interlocking heads slide over each other for easy positioning before snapping together, offering flexibility during installation.

Its synthetic rubber-based black PE foam tape backing provides a quick stick and short dwell time, making installation fast and efficient. The product’s lightweight nature keeps it hidden beneath surfaces without affecting material integrity.

Indoor Use And Pack

Designed primarily for indoor applications, the 3M Dual Lock SJ3540 withstands temperatures up to 120°F (49°C), ensuring reliable performance in typical indoor environments. This makes it suitable for decorative trim, product IDs, and other interior uses.

Each case contains 2 rolls, providing ample material for multiple projects or large-scale installations. The pack size supports both professional and DIY needs, offering convenience and value in one package.