Unlock Simplicity
Durable and secure, 3M™ Dual Lock™ Reclosable Fastener SJ3540 has exceptional strength through its interlocking mushroom-shaped heads (250 stem density per square inch), providing up to 5X the tensile strength of typical hook-and-loop products. We designed this fastener with a synthetic rubber-based black PE foam tape protected by a removable, film liner. This pressure sensitive adhesive features quick stick and a short dwell time. With 3M™ Dual Lock™ Reclosable Fastener SJ3540, there is no need for any drilling, screwing or sewing tools which makes for quick installation.
Recommended Applications:
- Access panels
- Interior signage
- Decorative trim
- Office partitions
- Product IDs
Design Flexibility
3M™ Dual Lock™ Reclosable Fastener SJ3540 consists of interlocking mushroom-shaped heads that easily slide over each other, allowing for positioning of parts before being snapped together. This fastening process creates a durable attachment and provides fast product assembly with great design flexibility. Our reclosable fasteners can also engage with different stem densities for varying levels of strength and system performance.
3M™ Dual Lock™ Reclosable Fasteners sound an audible snap when secure, which verifies closure of the attachment. To disengage, simply peel the pieces apart by hand. Our fasteners maintain their strength throughout multiple attachments and detachments. A lightweight alternative to metal fasteners, this product remains hidden beneath surfaces and does not interfere with the integrity of your material—providing aesthetic improvements and design flexibility.
Hundreds of Reattachments in a Snap
When two pieces of 3M™ Dual Lock™ Reclosable Fasteners mate, the stems flex and the mushroom heads slide past each other. After passing the opposing mating piece, the stems snap back into their original position and the opposing mushroom heads interlock. These fasteners can provide high tensile strength but can be opened by simply cleaving or peeling open the closure. This product is well suited for many indoor applications where a good performance, high strength, reclosable fastening system is required.
Delivers Long-Lasting Performance
Not all design requirements are easily satisfied, but you can simplify your attachments. When you need a strong, reliable, yet removable closure, 3M™ Dual Lock™ Reclosable Fasteners are the easy alternative to traditional fastening methods such as screws, nuts or bolts.

Dynabrade 69522 Housing for 69500, 5,000 RPM
3M 05740, Hookit Hand Block, 2-3/4 in x 5 in, 7000045715
3M 17227, Heavy Duty Duct Tape DT11, Silver, 48 mm x 54.8 m, 11 mil, 7100158346
Dynabrade 22093 4-1/2" x 9" Hand Sanding Block
3M™ 17323, Versaflo™ Respiratory Helmet Assembly M-407, with Premium Visor and Flame Resistant Shroud, 7000002395, 1 EA/Case
Insize 7341-6S, PIN GAGE HANDLE (with 1pc handle and 6 pairs of collecting bushes), .281-.341", 6928640360671
Dynabrade 11477 Dynabelter Abrasive Belt Tool, Heavy-Duty
3M 07832, Multi-Purpose Spray Adhesive 27, Clear, 16 fl oz Can (Net Wt 13.05 oz), 7000028596, 12/Case
Standard Abrasives 873273, S/C Unitized Wheel, 732, 6 in x 1/4 in x 1/2 in, 7010301203
3M 20365, Scotch-Weld Epoxy Adhesive 2216, Gray, Part A, 5 Gallon Drum (Pail), 7000046361
3M 10455, Cloth Sheet 481W, 220, 9 in x 11 in, 7010294811
3M 35832, Hookit Dust Extraction Flexible Radius Sanding Block, 273 mm x 66 mm, 7100256499
3M 29833, Sanding Screen, 120 Grit, 18 in x NH, 7100160843
3M 05444, Stikit Hand File Board, 2-3/4 in x 16 in, 7000045763
Standard Abrasives 713297, Aluminum Oxide Handy Roll, P120 J-weight, 2 in x 50 yd, 7100031623
3M 01328, PSA Cloth Disc 348D, P180 X-weight, 3 in x NH, Die 300V, 7000045068
3M 11414, Roloc Disc 361F, P120 XF-weight, TR, 1 in, Die R100N, 7000045104
Dynabrade 60051 .1 hp Straight-Line Quick-Change Pencil Grinder, Rear Exhaust, 60,000 RPM, 1/8" Collet
3M 29823, Sanding Screen, 100 Grit, 20 in x NH, 7100160246
3M 29611, 641WY 1/4" X 24", 100 Mesh Diamond Cloth Belt, 7010534832 