3M 7000001980 Dual Lock Reclosable Fastener SJ3540 Black

Product Description

The 3M 7000001980 is a reclosable fastener strip sold as the SJ3540 Dual Lock series, designed for repeated attach-and-release applications without tools. The backing features a rubber-based pressure-sensitive adhesive bonded to a black polypropylene mushroom-stem strip. Each strip delivers 250 stems per square inch, producing a firm mechanical closure with an engaged thickness of 0.23 inches. Closure life is rated at 1,000 open-and-close cycles. The roll measures 1 inch wide by 50 yards long and is intended for technicians and installers who need a secure, repositionable fastening method on panels, enclosures, signs, or equipment housings.

This fastener is engineered for indoor use and performs in low-temperature environments up to 120 degrees F. It bonds to a broad range of substrates including acrylic, polycarbonate, ABS, powder-coated paint surfaces, and low surface energy materials such as polypropylene and polyethylene. Typical applications include securing access panels, cable management clips, control module covers, filter frames, and lightweight equipment to flat or curved interior surfaces in residential and light commercial installations.

Key Features

• 250 stems per square inch for consistent mechanical closure force
• 0.23-inch engaged thickness when mated with opposing strip
• 1,000-cycle rated closure life for long-term repeated use
• Rubber-based adhesive bonds to low surface energy plastics including polypropylene and polyethylene
• Black polypropylene construction rated for indoor use up to 120 degrees F
• 1-inch-wide x 50-yard roll format for field cutting to any required length

Compatibility

Compatible with acrylic, polycarbonate, ABS, powder-coated paint, polypropylene, and polyethylene substrates as stated by the manufacturer. Designed for indoor use only.

Installation Notes

Surface preparation is critical before application — clean the mounting surface thoroughly to remove dust, oil, and moisture for maximum adhesive contact. Apply firm pressure along the full length of the strip after placement to ensure proper adhesive transfer. This fastener is intended for indoor use only and should not be exposed to outdoor weathering, UV, or moisture ingress. No special tools or trade license are required for installation, though HVAC and electrical technicians commonly use this product when securing access covers and lightweight panels.

Technical Specifications

• Series: SJ3540
• Stem Density: 250 stems per square inch
• Engaged Thickness: 0.23 inches
• Closure Life: 1,000 cycles
• Width: 1 inch
• Length: 50 yards
• Color: Black
• Adhesive Type: Rubber-based pressure-sensitive
• Backing Material: Polypropylene
• Temperature Resistance: Up to 120 degrees F
• Application Environment: Indoor use only
• Weight: 4.03 pounds
• Unit of Measure: Roll
• UPC: 00021200658129

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000001980