3M Dual Lock SJ3870 Reclosable Fastener (various options)

3M™ Dual Lock™ SJ3870 is a black polypropylene hook-and-loop fastener with a modified acrylic adhesive that provides five times greater tensile strength than standard hook-and-loop fasteners. The mushroom-shaped interlocking system (250 stems per 6.5 cm²) allows for opening and closing up to 1000 times before losing 50% of its holding power, and an audible "snap" confirms secure closure. The product offers excellent resistance to high temperatures (up to 82°C), moisture, and UV radiation, and is designed for a wide range of applications in industry, transport, electronics, and construction – both indoors and outdoors.

Technical specifications:

• Model: 3M™ Dual Lock™ SJ3870
• Colour: black
• Width: 25 mm
• Lengths: 2.5 m, 41 m
• Overall thickness: 6.1 mm
• Fastener type: mushroom-shaped interlocking system (250 stems / 6.5 cm²)
• Adhesive type: modified acrylic
• Temperature resistance: up to 82°C
• Weather resistance: moisture, UV
• Durability: up to 1000 cycles before 50% loss of holding power
• Application: indoor and outdoor

Application:

• General industry, transport, special vehicles
• Electronics, medical equipment, POS displays and exhibitions
• Construction and furniture
• Maintenance, repair and overhaul (MRO)
• Mounting panels, covers, service components

Benefits and properties:

✅ Exceptional strength – five times stronger connection than hook-and-loop fasteners
✅ Reusable – up to 1000 opening and closing cycles
✅ High resistance – UV, moisture, temperature up to 82°C
✅ Aesthetic fastening – hidden connection without damaging surfaces
✅ Versatile application – works on plastics, metals, powder coatings