You are here:Home > Printed Catalog > Tapes > Reclosable Fasteners > Dual Lock™ Reclosable Fasteners

When you need a strong, reliable attachment that also opens and recloses, look no further than 3M™ Dual Lock™ Reclosable Fasteners. Strong, interlocking mushroom-shaped heads slide past each other to close with a snap, then peel apart easily when you need to reopen. 3M™ Dual Lock™ Reclosable Fastener strips make excellent quick-release access panel fasteners and die-cut pieces can also be used to attach accessories to a dashboard or windshield. The quick-release fastening can also be used for interior panels that require maintenance or changeable signage and display units.

  • Interlocking mushroom-shaped heads have five times the tensile strength of hook and loop products
  • Durable — open and close up to 1,000 times before losing 50% of original tensile strength
  • Temperature, moisture and UV resistant
  • Pressure-sensitive adhesive easily forms a powerful bond
  • Easy to apply and maintain, easy to clean out dust or debris
  • Helps reduce vibration
  • A variety of pressure-sensitive adhesives are available to form a powerful bond with many materials
  • Low profile option is approximately half the thickness of standard 3M™ Dual Lock Reclosable Fastener

Mix and Match Densities for the Strength You Need

Different combinations within the 3M™ Dual Lock™ Reclosable Fastener family let you find the right strength for your application. 3M™ Dual Lock™ Reclosable Fasteners have mushroom-shaped heads in three different densities, or Types: approximately 170, 250 or 400 heads per square inch. Start by mating 250:250 and then determine what to try next.

Stem Density Combinations (per sq/in)Notes



For more strength change one side to Type 400


250:250 or 170:400

Start with 250:250 and test in your application



If you don’t need that much strength, change one side to Type 170

Not Recommended*

170:170 or 400:400

*We advise against mating 400:400 because the density makes it difficult to engage and disengage effectively.
For 170:170 the head pattern may not match up well to engage the heads properly.