3M Dual Lock SJ3550CF Reclosable Fastener
The 3M Dual Lock SJ3550CF is a pressure-sensitive adhesive backed reclosable fastener engineered for professionals who need reliable, hidden attachment solutions without traditional screws or bolts. This dual lock fastener combines acrylic VHB adhesive technology with innovative hook-and-loop mechanics, making it ideal for electronics assembly, automotive applications, signage, and industrial equipment where vibration resistance and clean aesthetics matter. Whether you're securing panels, mounting components, or creating removable attachments, this reclosable fastener delivers positive-locking performance on medium to high surface energy substrates.
Key Features
- Pressure-sensitive adhesive backing with acrylic VHB firm-type formulation for superior bond strength
- Dual lock reclosable design enables repeated attach-and-detach cycles without adhesive degradation
- Black polyolefin/polypropylene backing resists environmental stress and maintains flexibility
- Replaces mechanical fasteners, eliminating drilling, tapping, and fastener hardware costs
- Hidden attachment solution provides clean, professional appearance on finished products
- Medium to high surface energy compatibility for metals, plastics, and composites
- Supplied in convenient roll form with multiple width options for custom applications
- Vibration-resistant locking mechanism ideal for automotive and industrial equipment
Technical Specifications
| Specification |
Details |
| Part Number |
SJ3550CF |
| Manufacturer |
3M Display Materials and Systems |
| Product Type |
Reclosable Fastener |
| Adhesive Type |
Acrylic VHB Pressure-Sensitive Adhesive (PSA) |
| Backing Material |
Black Polyolefin/Polypropylene |
| Form Factor |
Roll |
| Surface Energy Compatibility |
Medium to High |
| Application |
Electronics, Automotive, Signage, Industrial Equipment |
| Fastening Method |
Dual Lock Reclosable Mechanism |
Frequently Asked Questions
What makes the 3M Dual Lock SJ3550CF better than traditional fasteners?
The dual lock reclosable fastener eliminates drilling, tapping, and hardware costs while providing a clean, hidden attachment. Its pressure-sensitive adhesive backing bonds instantly to prepared surfaces, and the positive-locking mechanism resists vibration and repeated use cycles without degradation.
Can I reuse the 3M Dual Lock SJ3550CF after removing it?
Yes. The reclosable fastener design allows multiple attach-and-detach cycles. The acrylic VHB adhesive maintains its bonding strength through repeated applications, making it ideal for removable panels, modular assemblies, and temporary installations.
What surfaces does this pressure-sensitive adhesive work on?
The SJ3550CF is formulated for medium to high surface energy substrates including metals, rigid plastics, composites, and painted surfaces. For optimal bonding, ensure surfaces are clean, dry, and free of contaminants before application.
How does the dual lock mechanism provide vibration resistance?
The reclosable fastener's hook-and-loop locking design creates a mechanical interlock that resists vibration-induced loosening. Combined with the firm-type acrylic VHB adhesive backing, this dual approach ensures secure attachment in automotive, industrial, and high-vibration environments.
