Industrial-grade reclosable fastener with interlocking mushroom heads, 250 stem density, 5X tensile strength, black PE foam with synthetic rubber adhesive, 50 yards, Type 250, audible snap closure, up to 1000 reattachments.
The 3M™ Dual Lock™ Reclosable Fastener SJ3540 is a revolutionary alternative to traditional fastening methods such as screws, nuts, and bolts. Featuring interlocking mushroom-shaped heads with 250 stem density per square inch, this fastener delivers exceptional strength with up to 5X the tensile strength of typical hook-and-loop products. The black PE foam tape with synthetic rubber-based adhesive bonds effectively to a variety of substrates, including low surface energy plastics like polyethylene and polypropylene. With a pressure-sensitive adhesive that features quick stick and short dwell time, installation requires no drilling, screwing, or sewing tools, making it ideal for quick assembly applications.
Designed for industrial and occupational use, this 50-yard roll comes in a convenient 1.5-inch width format. The fastener provides durable, reclosable fastening that can be opened and closed multiple times while maintaining strength throughout hundreds of reattachments. The audible snap when securing verifies proper closure, and pieces can be easily separated by hand peeling. With a maximum operating temperature of 120°F (49°C) and indoor use suitability, this fastener is perfect for access panels, interior signage, decorative trim, office partitions, and product identification applications.
The 3M Dual Lock SJ3540 Type 250 fastener mates with Type 170, Type 250, or Type 400 stem densities to provide customizable strength combinations based on project requirements. The white polyolefin primary liner protects the adhesive until application, and the engaged thickness of 226 mil (5.8 mm) ensures reliable performance. With a closure life of 1000 cycles, this fastener maintains its integrity through repeated use, making it an excellent choice for applications requiring a strong yet removable closure system.
Key Features
- Interlocking mushroom-shaped heads with 250 stem density per square inch for exceptional strength
- Provides up to 5X the tensile strength of typical hook-and-loop fasteners
- Synthetic rubber-based adhesive bonds to low surface energy plastics including polyethylene and polypropylene
- Audible snap verification ensures secure closure with easy hand-peel separation
- Supports hundreds of reattachments with maintained strength and closure life of 1000 cycles
- Quick stick pressure-sensitive adhesive with short dwell time for rapid installation
- No drilling, screwing, or sewing tools required for installation
- Compatible with Type 170, Type 250, and Type 400 stem densities for customizable strength
- Maximum operating temperature of 120°F (49°C) suitable for indoor applications
- Removable white polyolefin film liner protects adhesive until application
Technical Specifications
| Specification |
Value |
| Product Name | 3M Dual Lock Reclosable Fastener SJ3540 |
| Part Number | SJ3540 |
| 3M Product Number | SJ3540 |
| 3M ID | 7010341003 |
| UPC | 00021200443282 |
| Product Color | Black |
| Overall Width (Imperial) | 1.5 in |
| Overall Width (Metric) | 38.1 mm |
| Overall Length (Imperial) | 50 yd |
| Overall Length (Metric) | 45.72 m |
| Engaged Thickness (Imperial) | 226 mil |
| Engaged Thickness (Metric) | 5.8 mm |
| Primary Liner Thickness (Imperial) | 5 mil |
| Primary Liner Thickness (Metric) | 0.13 mm |
| Product Form | Roll |
| Stem Density | 250 per square inch |
| Type | Type 250 |
| Backing Material | Polyolefin |
| Primary Liner Material | White Polyolefin |
| Primary Liner Color | White |
| Adhesive Color | Black |
| Adhesive Type | Synthetic rubber-based pressure-sensitive adhesive |
| Maximum Operating Temperature (Fahrenheit) | 120°F |
| Maximum Operating Temperature (Celsius) | 49°C |
| Closure Life | 1000 cycles |
| Indoor/Outdoor | Indoor |
| Flame Retardant | No |
| Units per Case | 1 Roll |
| Smallest Saleable Unit | Roll |
| Brand | 3M Dual Lock |
| Compatible Types | Type 170, Type 250, Type 400 |
| Tensile Strength Advantage | Up to 5X stronger than typical hook-and-loop products |
| Installation Method | Pressure-sensitive adhesive, no tools required |
| Substrate Compatibility | Low surface energy plastics, polyethylene, polypropylene, and various other substrates |
| Application Type | Reclosable fastening system |
| Use Classification | Industrial/occupational use only |
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