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3M™ Dual Lock™ SJ3540 Indoor, Black
Shown mated - sold unmated in rolls

3M™ Dual Lock™ SJ3540 Indoor, Black

Your Price: $8.10
Part Number:SJ3540
  • Stem Count:250 stems / square inch
  • Mates To:Type 170, 250 & 400
  • Engaged Thickness:0.23 inches

Choose Options

Quantity Pricing - By The Yard
  • 1 - 5
  • $8.10
  • 6 - 24
  • $6.97
  • 25 - 49
  • $5.91
  • 50 - 99
  • $4.62
  • 100+
  • $4.21

Dual lock™ interlocking mushroom-shaped stems snap together to provide tensile strength strong enough to replace mechanical fasteners making it great for tight spaces, especially where you don’t want to penetrate the surface.

Use this product when you’re looking for a choice of widths of Dual Lock™ where each strip comes separate. This product comes UNMATED. Each strip is one side or one half of the reusable fastener.  

This reclosable fastener bonds to glass, bare metal, sealed wood, vinyl, and polystyrene. Use indoors up to 120°F. Interlocking mushroom-shaped stems snap together to provide tensile strength strong enough to replace mechanical fasteners. Maximum bond achieved 72 hours after initial application.  Surface must be clean, dry and free from oil.

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.

3M 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. 


  • Black stems with rubber based adhesive backing
  • General purpose adhesive backing (avoid fabrics and vinyls)
  • Suggested indoor use only
  • Standard roll size: 50 yards
  • This product comes UNMATED (10 yards ordered = 5 yards of fastened material)
  • We stock 3M standard widths of 0.5", 1", 2" and made to order 6".  3M also has widths of 0.75", 1.5" and 3" wide rolls that we can special order for you with a lead time of up to 4 weeks as they are made to order. 

Series Data Sheet

3M™ Dual Lock™ SJ3540 will "mate" to itself and other Type 250, Type 170 and Type 400 3M™ Dual Lock™ fasteners. When mating to Type 170 there will be less of a grip, while mating to Type 400 will provide a tighter grip. Most applications will work using just Type 250 alone and has the added ease of only having to keep track of one type of Dual Lock. 

SJ3540 can be identified by the plain white backing (liner) with a dark grey, almost black foam adhesive underneath. The foam has a rubber based adhesive that should only be used for indoor applications and will stick to most surfaces. It is the suggested best option if you are trying to adhere to powdered paint or wood. This adhesive will perform poorly however on car dashboards.

Recommended Applications:

  • Access panels
  • Interior signage
  • Decorative trim
  • Office partitions
  • Product IDs

*Please make sure to test your specific applications as the information provided is only a general guideline.*

  • 3M ID 1/2" WIDE: 70-0705-2105-2 UPC: 0-00-21200-65811-2
  • 3M ID 1" WIDE: 70-0705-2106-0 UPC:0-00-21200-65812-9
  • 3M ID 2" WIDE: 70-0705-2107-8 UPC:0-00-21200-65813-6
  • 3M ID 1/2" WIDE: 70-0705-2105-2 UPC: 0-00-21200-65811-2
  • 3M ID 6" WIDE: 70-0063-5675-5 UPC:0-00-48011-57916-0

More Dual Lock™ options are available to meet your needs. 

See our Pre-Cut Strips and Coins pages or ask about our Cut-To-Size Services. 

Forward specifications and quantities to [email protected] for pricing.

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