3M 7000124668 Dual Lock Fastener SJ3871 Black 0.5x45yd

Product Description

The 3M 7000124668 is a Dual Lock reclosable fastener supplied as model SJ3871 in a continuous roll format. It features a black polypropylene mushroom-stem surface bonded to a modified acrylic adhesive backing, allowing it to mate with an opposing Dual Lock strip for a secure, repositionable closure. The fastener delivers 400 stems per square inch and an engaged thickness of 0.24 inches. It is rated for a closure life of 1,000 open-and-close cycles and maintains performance up to 180 degrees F. Trade installers in HVAC, electrical panel, and general industrial applications use this product to create clean, tool-free access panels and component mounting solutions.

This fastener is suited for both indoor and outdoor installations where a reclosable, pressure-sensitive mounting solution is needed. The modified acrylic adhesive bonds to a wide range of low to medium surface energy materials, making it practical for use in equipment housings, ductwork covers, and control panel liners. It performs well in medium-temperature environments and is appropriate for use on powder-coated paints, acrylic, polycarbonate, ABS, and polyethylene substrates. The roll format allows installers to cut to length on the job.

Key Features

• 400 stems per square inch for firm, consistent closure across the bond area
• Modified acrylic adhesive backing adheres to low and medium surface energy materials
• Rated for 1,000 closure cycles for long-service reclosable mounting
• Temperature resistance up to 180 degrees F for medium-temperature environments
• Rated for indoor and outdoor use
• Black polypropylene construction in a continuous roll for cut-to-length installation

Compatibility

Designed for use on polyethylene, acrylic, polycarbonate, ABS, powder-coated paints, and other medium to low surface energy materials. Intended to mate with an opposing 3M Dual Lock strip for a complete reclosable fastener system.

Installation Notes

Clean and dry the substrate thoroughly before applying the adhesive-backed strip, as surface contamination will reduce bond strength. Cut the roll to the required length using shears or a utility knife. Apply firm hand pressure along the full length of the strip to ensure full adhesive contact. Allow adequate dwell time before loading the closure, following standard pressure-sensitive adhesive bonding practice.

Technical Specifications

• Model Series: SJ3871
• Stem Density: 400 stems per square inch
• Engaged Thickness: 0.24 inches
• Closure Life: 1,000 cycles
• Temperature Resistance: 180 degrees F
• Roll Width: 0.5 inches
• Roll Length: 45 yards
• Color: Black
• Backing Material: Polypropylene
• Adhesive Type: Modified acrylic
• Unit of Measure: Roll
• Weight: 2.63 pounds

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000124668