3M Dual Lock SJ3540 Reclosable Fastener
The 3M Dual Lock SJ3540 reclosable fastener is engineered for professionals and manufacturers who need a strong, reusable bonding solution for demanding indoor applications. Whether you're assembling electronics, securing components to powder-coated surfaces, or bonding low surface energy plastics, this synthetic rubber adhesive fastener delivers reliable, repositionable attachment without permanent damage. The innovative mushroom-shaped stem design provides superior holding power while maintaining the flexibility to separate and reattach components repeatedly—ideal for prototyping, assembly lines, and field repairs where traditional adhesives fall short.
Key Features
-
Mushroom-shaped stems for superior reclosable grip and holding strength
-
Synthetic rubber adhesive backing bonds securely to plastics and low surface energy materials
- Black polypropylene construction resists wear and environmental stress
- Repositionable design—separate and reattach hundreds of times without degradation
- Suitable for powder-coated paints and challenging substrate bonding
- Indoor-rated for reliable performance in controlled environments
- No tools required—simple peel-and-stick application
Technical Specifications
| Specification |
Details |
| Manufacturer |
3M Display Materials and Systems |
| Part Number |
SJ3540 |
| Product Type |
Reclosable Fastener |
| Adhesive Type |
Synthetic Rubber |
| Material |
Black Polypropylene |
| Stem Design |
Mushroom-shaped |
| Application |
Indoor bonding and assembly |
| Compatible Surfaces |
Plastics, powder-coated paints, low surface energy materials |
| Reusability |
Reclosable—hundreds of attach/detach cycles |
Frequently Asked Questions
What surfaces does the 3M Dual Lock SJ3540 bond to?
The SJ3540 is specifically formulated to bond securely to challenging low surface energy materials including plastics, powder-coated paints, and other difficult-to-adhere substrates. Its synthetic rubber adhesive provides reliable attachment where standard fasteners may fail.
Can the 3M Dual Lock reclosable fastener be reused?
Yes—the mushroom-shaped stem design allows for hundreds of reattachment cycles. You can separate and reposition components repeatedly without losing holding strength, making it ideal for prototyping, testing, and field modifications.
Is the SJ3540 suitable for outdoor applications?
The 3M Dual Lock SJ3540 is rated for indoor use. For outdoor or high-temperature environments, consult 3M's product line for alternative reclosable fastener solutions designed for extended environmental exposure.
How do I apply the 3M Dual Lock SJ3540 fastener?
Simply peel the backing and press firmly onto your substrate. The synthetic rubber adhesive creates an immediate bond. For maximum holding strength, allow 24 hours for full cure before subjecting the assembly to heavy loads.
