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 3M Dual Lock tape roll, mushroom stems on polypropylene backing, 1 inch wide by 15 feet long

3M

3M Dual Lock Type 400 Reclosable Fastener SJ3551 1 in x 15 ft Black

SKU CH-7JPN-H5TJA

Black reclosable fastener strip with 400 stems per square inch and 1,000 closure cycles for secure, repositionable mounting

  • TypeAdhesive Tapes
  • ColorBlack
  • Reclosable up to 1,000 cycles with 400 stems per square inch
  • 5× stronger closure than hook-and-loop via mushroom-shaped stems
  • Bonds metal, glass and high-energy plastics with acrylic adhesive
  • 15-foot roll on polypropylene carrier for long continuous runs
  • Mates with type 170, 250 or 400 counterparts for adjustable strength

3M Dual Lock SJ3551 Fastener

This 15-foot roll of black reclosable fastener uses 400 mushroom-shaped stems per square inch on a polypropylene carrier with acrylic adhesive. It suits makers, technicians and maintenance crews who need removable attachment without drilling or permanent hardware. The engaged thickness is .23 inches and the closure life is rated for 1000 cycles. It bonds to metals, glass and medium-to-high surface energy plastics and paint.

Sustained load behaviour

Under continuous stress the fastener relies on the acrylic adhesive bond to the substrate and the stem-to-stem interlock between two pieces. The closure strength increases when mated with type 170, 250 or 400 counterparts, with higher combined numbers giving greater holding power. Long-term performance depends on surface preparation and the combined stem density of the two mating halves. The product ships with either a white or clear release liner but identical specifications.

Installation and common issues

Apply the adhesive side to clean, dry surfaces and press firmly to activate the pressure-sensitive bond; allow dwell time before engaging the mating half. Common problems include insufficient surface cleaning, mating with incompatible stem densities that reduce strength, and expecting the single roll to function alone — two pieces are required for a working closure. The fastener replaces screws, clips, rivets, snaps, hook and loop and bolts where access or repositioning is needed.

Highlights

  • Reclosable up to 1,000 cycles with 400 stems per square inch
  • 5× stronger closure than hook-and-loop via mushroom-shaped stems
  • Bonds metal, glass and high-energy plastics with acrylic adhesive
  • 15-foot roll on polypropylene carrier for long continuous runs
  • Mates with type 170, 250 or 400 counterparts for adjustable strength

Specifications

TypeAdhesive Tapes
ColorBlack

Questions about this item

How much power does the 3M Dual Lock SJ3551 consume when it is engaged all day?

The fastener uses no electricity; it relies on mushroom-shaped stems that interlock mechanically, so there is no power draw or heat generated during continuous use.

What surface must I already have clean and ready for the acrylic adhesive on the SJ3551 to bond properly?

The adhesive is designed for metals, glass, and medium-to-high surface-energy plastics and paint; the substrate should be clean, dry and free of dust or oil before application.

Will the Type 400 stems on this 15 ft roll mate securely with the Type 250 strips I already use on my panels?

Yes, Type 400 fasteners can engage with Type 170, 250 or 400 counterparts; combined stem density determines closure strength, so a 400-to-250 pairing will hold firmly.

Also in this aisle

People compared these

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