3M 7000051932 Dual Lock Reclosable Fastener SJ3540 Black

Product Description

The 3M 7000051932 is the Dual Lock Reclosable Fastener SJ3540, a black polypropylene interlocking fastener strip with a rubber-based pressure-sensitive adhesive backing. It provides a mechanical closure that engages and releases repeatedly, making it a reliable alternative to traditional hook-and-loop systems. The fastener features 250 stems per square inch and an engaged thickness of 0.23 inches. Closure life is rated at 1,000 open-and-close cycles. HVAC technicians, electricians, and panel fabricators install this product when they need a clean, removable mounting solution for panels, covers, and wire management components in controlled indoor environments.

This fastener strip is suited for indoor applications where a secure but reclosable bond is needed on compatible substrate surfaces. It adheres to many plastics including acrylic, polycarbonate, and ABS, as well as powder-coated paints and low-surface-energy materials such as polypropylene and polyethylene. Temperature resistance tops out at 120 degrees F, so it is intended for ambient indoor environments rather than high-heat zones near heat exchangers, flue assemblies, or direct-sunlight exterior surfaces. Typical uses include securing access panels, junction box covers, control module mounts, and equipment nameplates in light commercial and residential installations.

Key Features

• 250 stems per square inch for strong mechanical engagement without tools
• Engaged thickness of 0.23 inches keeps the profile low on mounted surfaces
• Rated for 1,000 open-and-close cycles for long service life in repeated-access applications
• Rubber-based adhesive backing bonds to acrylic, polycarbonate, ABS, powder-coated paint, polypropylene, and polyethylene
• Black polypropylene construction blends with standard equipment enclosures
• Supplied as a continuous roll, 0.5 inches wide by 50 yards, for job-site cutting to length

Compatibility

Compatible substrates include acrylic, polycarbonate, ABS, powder-coated paints, polypropylene, and polyethylene surfaces. Intended for indoor use only. Not rated for outdoor, high-humidity, or elevated-temperature environments above 120 degrees F.

Installation Notes

Surface preparation is critical for adhesive performance: clean the substrate thoroughly with isopropyl alcohol and allow it to dry completely before applying the fastener strip. Apply firm, even pressure along the full length of the strip to ensure full adhesive contact. Because this product is rated for indoor use and has a maximum temperature resistance of 120 degrees F, do not install near heat sources, exhaust vents, or any surface subject to elevated operating temperatures. No special tools are required for cutting the roll to length; standard utility scissors or a knife and straightedge are sufficient.

Technical Specifications

• Stem Density: 250 stems per square inch
• Engaged Thickness: 0.23 inches
• Closure Life: 1,000 cycles
• Maximum Temperature Resistance: 120 degrees F
• Width: 0.5 inches
• Length: 50 yards
• Color: Black
• Backing Material: Polypropylene
• Adhesive Type: Rubber-based pressure-sensitive
• Environment: Indoor use only
• Unit of Measure: Roll
• Weight: 0.95 pounds

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000051932