Heavy-duty reclosable fastener with interlocking mushroom heads delivering 5X stronger tensile strength than hook-and-loop alternatives. Features audible snap closure, synthetic rubber adhesive, and 1000-cycle durability for indoor applications.
The 3M™ Dual Lock™ Reclosable Fastener SJ3542 is an innovative fastening solution designed to replace traditional screws, nuts, and bolts with a durable, reusable alternative. This premium reclosable fastener features interlocking mushroom-shaped heads with 170 stem density per square inch, providing exceptional strength with up to 5X the tensile strength of typical hook-and-loop products. The fastener comes in a convenient 2-inch by 50-yard roll format with a synthetic rubber-based black polyethylene foam tape backing protected by a removable film liner.
This pressure-sensitive adhesive fastener is engineered with modified acrylic adhesive that bonds exceptionally well to a variety of substrates, including low surface energy plastics such as polyethylene and polypropylene. The fastener operates with a secure audible snap when properly engaged, confirming closure and providing verification of attachment integrity. Installation is quick and straightforward—requiring no drilling, screwing, or sewing tools—making it ideal for rapid assembly and reconfiguration applications. The product maintains its strength throughout hundreds of reattachments, with a closure life rating of 1000 cycles.
The 3M Dual Lock Reclosable Fastener SJ3542 is specifically designed for indoor applications and delivers reliable performance in temperatures up to 120°F (49°C). It mates seamlessly with Type 250 and Type 400 stem densities to provide customizable strength combinations for diverse project requirements. Recommended applications include access panels, interior signage, decorative trim, office partitions, and product identification systems. This hidden fastener provides a snug fit and smooth aesthetic appearance while maintaining the integrity of your materials.
Key Features
- Interlocking mushroom-shaped heads with 170 stem density provide exceptional holding strength
- 5X greater tensile strength compared to traditional hook-and-loop fasteners
- Audible snap closure verifies secure attachment and provides positive engagement feedback
- Synthetic rubber-based adhesive bonds to low surface energy plastics and diverse substrates
- Reusable and reclosable with 1000+ attachment and detachment cycles without strength loss
- Quick and tool-free installation requiring no drilling, screwing or sewing
- Compatible with Type 250 and Type 400 stem densities for customizable strength levels
- Temperature resistant up to 120°F (49°C) for reliable indoor performance
- Smooth aesthetic appearance with hidden fastening that maintains material integrity
- Removable film liner with quick stick and short dwell time pressure-sensitive adhesive
Technical Specifications
| Specification |
Value |
| Product Number | SJ3542 |
| Product Form | Roll |
| Overall Width (Imperial) | 2 in |
| Overall Width (Metric) | 50.8 mm |
| Overall Length (Imperial) | 50 yd |
| Overall Length (Metric) | 45.72 m |
| Engaged Thickness (Imperial) | 0.23 in |
| Engaged Thickness (Metric) | 5.8 mm |
| Product Color | Black |
| Adhesive Type | Modified Acrylic |
| Adhesive Color | Black |
| Backing Material | Polyolefin |
| Primary Liner Material | White Polyolefin |
| Primary Liner Thickness (Imperial) | 5 mil |
| Primary Liner Thickness (Metric) | 0.13 mm |
| Stem Density | 170 stems per square inch |
| Closure Life | 1000 cycles |
| Maximum Operating Temperature (Fahrenheit) | 120°F |
| Maximum Operating Temperature (Celsius) | 49°C |
| Indoor/Outdoor Rating | Indoor |
| Flame Retardant | No |
| Units per Case | 1.0 Roll |
| Smallest Saleable Unit | Roll |
| Brand | 3M Dual Lock |
| UPC Code | 00021200873409 |
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