3M Dual Lock SJ3550A 1"×8ft Black Reclosable Fastener Mounting Tape 1 Pack | Interlocking Mushroom Shaped Strong Adhesive Hook Lock Sticky Tape Waterproof for Indoor and Outdoor, EZ Pass, Pedalboard — Fastening product photo
3M Dual Lock SJ3550A 1"×8ft Black Reclosable Fastener Mounting Tape 1 Pack | Interlocking Mushroom Shaped Strong Adhesive Hook Lock Sticky Tape Waterproof for Indoor and Outdoor, EZ Pass, Pedalboard — additional product view3M Dual Lock SJ3550A 1"×8ft Black Reclosable Fastener Mounting Tape 1 Pack | Interlocking Mushroom Shaped Strong Adhesive Hook Lock Sticky Tape Waterproof for Indoor and Outdoor, EZ Pass, Pedalboard — additional product view
Fastening

3M Dual Lock SJ3550A 1"×8ft Black Reclosable Fastener Mounting Tape 1 Pack | Interlocking Mushroom Shaped Strong Adhesive Hook Lock Sticky Tape Waterproof for Indoor and Outdoor, EZ Pass, Pedalboard

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The 3M Dual Lock SJ3550A is a reclosable fastener system that uses interlocking mushroom-shaped heads to provide a strong, reusable bond without the need for mechanical fasteners. The 1-inch wide black tape comes in an 8-foot roll and features a high-strength acrylic adhesive backing that adheres to a wide range of surfaces, including plastics, metal, and painted finishes. The mushroom-head interlocking design snaps together firmly and releases cleanly for repeated open-and-close cycles, making it ideal for mounting EZ Pass transponders, pedalboards, signs, panels, access doors, and removable components in indoor and outdoor applications. The all-weather adhesive holds up against moisture, temperature changes, and UV exposure, and the fastener can replace screws, bolts, and rivets where a removable or vibration-resistant mount is needed. Brand: 3M; Model: SJ3550A; Size: 1-Inch x 8 Feet; Color: Black; Application: mounting and fastening without mechanical hardware; Specific Use: Professional; Rating: 4.7 out of 5 stars; ASIN: B08R3BFZ27.

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Choosing Fastening

How do I choose the right fastening tool?

Match the tool to the fastener and material — a rivet tool for blind fasteners, a stapler or nailer for wood trim, and a crimp tool for terminals and connectors. Using the correct tool prevents damage and produces a secure, code-compliant joint.