3M 7000027570 Dual Lock Reclosable Fastener SJ3540 Black

Product Description

The 3M 7000027570 is a Dual Lock Reclosable Fastener sold under the SJ3540 series, designed for repeatable mechanical attachment without tools, hooks, or traditional hardware. The fastener features a rubber-based pressure-sensitive adhesive backing bonded to a black polypropylene mushroom-stem surface. With 250 stems per square inch and an engaged thickness of 0.23 inches, it delivers consistent closure force across a wide range of bonding surfaces. The roll format — 3 inches wide by 50 yards long — suits both high-volume fabrication shops and field installation teams. Rated for up to 1,000 open-and-close cycles, this product is installed by technicians across HVAC, electrical, and equipment panel applications where secure, removable attachment is required.

This fastener is intended for indoor use and performs in environments down to low temperatures with a maximum temperature resistance of 120 degrees F. It bonds reliably to a range of substrates including acrylic, polycarbonate, ABS plastics, powder-coated painted surfaces, and low surface energy materials such as polypropylene and polyethylene. Common installation scenarios include securing wire management panels, equipment access covers, control enclosures, and insulation blankets where repeated access is part of routine service workflow.

Key Features

• 250 stems per square inch for consistent mechanical closure force
• 0.23 inch engaged thickness when mated face to face
• Rated for up to 1,000 open-and-close cycles
• Rubber-based adhesive backing adheres to plastics, powder coatings, and low surface energy materials
• Black polypropylene construction rated to 120 degrees F
• Roll format: 3 inches wide x 50 yards long for cut-to-length field or shop use

Compatibility

Designed for use with acrylic, polycarbonate, ABS plastics, powder-coated paint surfaces, polypropylene, and polyethylene substrates in indoor applications. Not intended for outdoor or high-temperature environments exceeding 120 degrees F.

Installation Notes

Surface preparation is critical — clean bonding surfaces thoroughly to remove oil, dust, and moisture before applying the adhesive backing. Apply firm pressure across the full length of the fastener strip to ensure full adhesive contact. Allow adequate dwell time before loading the joint. Indoor use only; exposure to outdoor conditions or temperatures above the rated maximum may reduce adhesive bond strength over time.

Technical Specifications

• Series: SJ3540
• Stem Density: 250 stems per square inch
• Engaged Thickness: 0.23 inches
• Closure Life: 1,000 cycles
• Maximum Temperature: 120 degrees F
• Color: Black
• Material: Polypropylene with rubber-based adhesive
• Roll Width: 3 inches
• Roll Length: 50 yards
• Package Type: Roll
• Weight: 13 pounds
• UPC: 00021200231056

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000027570