We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black Dual Lock fastener strips on a roll, mushroom heads interlocking, 1 inch wide by 4.9 yards long

3M

3M Dual Lock Reclosable Fastener MP3541/MP3542 Black 1 in x 4.9 yd Type 400/170 video accessory

SKU CH-PY12-Q3G8E MPN MP3541/MP3542

Reclosable fastener mini pack supplies one strip each of Type 400 and Type 170 stems for indoor mounting up to 120°F (49°C)

  • Mini pack includes both SJ3541 and SJ3542 strips for versatile fastening
  • Interlocking mushroom heads snap audibly for confirmed closure up to 1000 cycles
  • Synthetic rubber adhesive bonds to low-energy plastics like polyethylene and polypropylene
  • Temperature resistant to 120°F (49°C) for reliable indoor performance
  • Hidden fastener alternative to screws provides smooth appearance without drilling holes

Mini pack dual-strip fastener for indoor mounting

This mini pack contains one strip each of SJ3541 and SJ3542 reclosable fastener, giving installers both Type 400 and Type 170 stem densities in a single 1 in by 4.9 yd roll. The interlocking mushroom-shaped heads snap together audibly so users can confirm closure by feel and sound. It is designed for indoor applications where a hidden, removable fastening method is preferred over screws or bolts.

Synthetic rubber adhesive

The black PE foam tape uses a synthetic rubber-based adhesive that bonds to a variety of substrates including low surface energy plastics such as polyethylene and polypropylene. It offers quick stick and short dwell time during installation. The fastener maintains reliable performance up to 120°F (49°C), making it suitable for typical indoor environments.

Type 400 and Type 170 stem densities mate to Type

The two included stem densities can both mate with Type 250, allowing the closure strength to be customised by mixing and matching strips. Buyers who need a single uniform density across a large area or who require outdoor-rated durability should consider other configurations. The audible snap verifies secure closure for up to 1000 open and close cycles.

Highlights

  • Mini pack includes both SJ3541 and SJ3542 strips for versatile fastening
  • Interlocking mushroom heads snap audibly for confirmed closure up to 1000 cycles
  • Synthetic rubber adhesive bonds to low-energy plastics like polyethylene and polypropylene
  • Temperature resistant to 120°F (49°C) for reliable indoor performance
  • Hidden fastener alternative to screws provides smooth appearance without drilling holes

Specifications

Brand3M
ModelMP3541/42
Part NumberMP3541/42
Shipping weight1.95 kg
Package size368 × 203 × 191 mm

Questions about this item

How do I install the 1 in x 4.9 yd Dual Lock strips and what step is often missed?

Clean the surface, peel the removable film liner, press the synthetic rubber-based adhesive strip firmly in place, then snap the Type 400 and Type 170 strips together — the audible snap confirms full engagement, which is the step people skip.

What maintenance or replacement will the MP3541/MP3542 fastener need over time?

The interlocking mushroom-shaped heads are rated for up to 1000 open-close cycles; replace the strip when the snap weakens or the adhesive no longer bonds to low surface energy plastics such as polyethylene or polypropylene.

What limit appears first when the fastener is under sustained load in a warm indoor space?

The synthetic rubber adhesive is rated to 120°F (49°C); above that temperature the bond can soften and release before the mushroom heads reach their mechanical limit.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.