Premium 3M Dual Lock reclosable fastener with 400 stems per square inch, featuring interlocking mushroom-shaped stems for strong, audible snap attachment. Non-woven backing compatible with liquid adhesives and hot melts, ideal for automotive trim and industrial applications.
The 3M™ Dual Lock™ Reclosable Fastener SJ3753 is a premium black roll good fastening system featuring a non-woven backing designed for use with liquid adhesives and hot melts. With 400 stems per square inch (25mm), this advanced fastener utilizes interlocking mushroom-shaped stems that snap together to create a strong, fast, and easy attachment solution. The polypropylene fastener can replace conventional mechanical fasteners such as screws or adhesives, offering superior performance in automotive and industrial applications.
This innovative fastening system is engineered to withstand high temperatures, solvents, moisture, humidity, and vibration while maintaining its holding power. The mushroom-shaped stems interlock to provide very high tensile strength and an audible click upon engagement, ensuring a secure, dependable, and repeatable attachment. The fastener requires no special tools or processing equipment for installation, making it ideal for applications requiring quick assembly and disassembly. It can be easily opened by cleaving or peeling, allowing for convenient realignment and reuse.
The SJ3753 is particularly suited for automotive trim components, interior and exterior trim panels, instrument panel bezels, headliners, sunroof rings, and vibration and sound damping applications. With its 4.2mm unmated thickness and non-woven backing, this fastener combines the durability of 3M science with practical engineering excellence. The product can be mated with Type 170 or 250 stem densities to achieve customized engagement and disengagement forces for specific application requirements.
Key Features
- Interlocking mushroom-shaped stems snap together with audible click for secure attachment
- Non-woven backing compatible with liquid adhesives and hot melts for easy installation
- Strong holding power reduces rattling and vibration of components
- Resistant to high temperatures, solvents, moisture, humidity, and extreme weather
- Reusable and reclosable design - no special tools required for assembly or disassembly
- 400 stems per square inch (25mm) provides tightest hold among three density options
- Can be mated with Type 170 or 250 stem densities for customized engagement forces
- Replaces conventional mechanical fasteners like screws and adhesives
- Ideal for automotive trim, interior/exterior panels, and vibration damping applications
- Audibly snaps together for dependable and repeatable attachment
Technical Specifications
| Specification |
Value |
| Product Type | Reclosable Fastener |
| Brand | 3M Dual Lock™ |
| Model Number | SJ3753 |
| 3M Product Number | SJ3753 |
| 3M ID | B40068946 |
| Stem Density | 400 stems per square inch (25mm) |
| Roll Goods Type | Non-woven backing |
| Unmated Thickness | 4.2 millimeters |
| Material | Polyolefin stems with polypropylene backing |
| Color | Black |
| Adhesive Compatibility | Liquid adhesives and hot melts |
| Temperature Resistance | High temperature and cold resistant |
| Moisture Resistance | Resistant to moisture and humidity |
| Solvent Resistance | Resistant to solvents |
| Compatible Stem Densities | Type 170 and Type 250 |
| Installation | No special tools or processing equipment required |
| Primary Applications | Automotive trim, interior/exterior panels, instrument bezels, headliners, sunroof rings, vibration damping |
| Engagement Type | Audible snap with high tensile strength |
| Reusability | Fully reusable and reclosable |
| Warranty | 3M standard product warranty |
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