3M 7100036637 Dual Lock Reclosable Fastener SJ3540 Black

Product Description

The 3M 7100036637 is a dual lock reclosable fastener sold as the SJ3540, a roll-format mechanical fastening tape used in light-duty bonding and mounting applications across industrial, commercial, and trade environments. The fastener features a rubber-based adhesive backing on a black polypropylene substrate and delivers 250 stems per square inch with an engaged thickness of 0.23 inches. Each roll measures 6 inches wide by 50 yards long. The closure system is rated for up to 1,000 open-and-close cycles, making it appropriate for access panels, removable equipment mounts, and other reclosable fastening needs where tool-free removal is required.

This fastener is intended for indoor use only and performs in low-temperature environments up to 120 degrees F. It is designed for bonding to a range of substrate types, including acrylic, polycarbonate, ABS plastics, and powder-coated paint surfaces. It also adheres to low surface energy materials such as polypropylene and polyethylene, expanding its usability in applications where standard pressure-sensitive adhesives typically underperform. Technicians working in panel assembly, equipment enclosures, and cable management find this format well-suited for repetitive access scenarios.

Key Features

• 250 stems per square inch for consistent mechanical interlock across the fastening surface
• Engaged thickness of 0.23 inches for predictable standoff in tight assemblies
• Rated for up to 1,000 closure cycles without significant performance degradation
• Rubber-based adhesive backing compatible with plastics, powder-coated surfaces, and low surface energy materials
• Black polypropylene construction for UV-stable indoor installations
• Roll format: 6 inches wide by 50 yards long for high-volume or large-area applications

Compatibility

Compatible with acrylic, polycarbonate, and ABS plastics, as well as powder-coated paint surfaces and low surface energy materials including polypropylene and polyethylene. Intended for indoor use only.

Installation Notes

Surface preparation is critical — clean bonding surfaces thoroughly and allow to dry completely before applying the adhesive backing. Apply firm, even pressure across the full contact area to ensure full adhesive engagement. This product is rated for indoor use only and should not be exposed to outdoor conditions or moisture. Follow the substrate manufacturer's recommendations when bonding to low surface energy plastics, as surface treatment or priming may improve adhesion.