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All 3M Products
Tapes
Reclosable Fasteners
Mushroom Hook Fasteners

3M Mushroom Hook Fasteners

3M™ Dual Lock™ Reclosable Fasteners

Looking for a reclosable fastener with super strength, ultimate ease and durable enough to last through repeated opening and closing?

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Interlocking mushroom-shaped heads have five times the tensile strength of hook and loop products.

Looking for a reclosable fastener? When you need a strong, reliable attachment that also opens and recloses, look no further than 3M™ Dual Lock™ Reclosable Fasteners. Interlocking mushroom-shaped heads have five times the tensile strength of hook and loop products.

3M™ Reclosable Fasteners are the easy alternative to traditional fastening methods such as screws, nuts or bolts. Super strength. Ultimate ease. Durable enough to last through repeated opening and closing.

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
- Type 170 (26 heads per square cm)
- Type 250 (39 heads per square cm)
- Type 400 (62 heads per square cm)

The Fast and Flexible Attachment Solution

Easy to Apply: Just peel off the protective liner from each mated piece of 3M™ Dual Lock™, attach them to your separate pieces (using a roller to ensure good adhesion) and then push the pieces together until you feel the mushroom-shaped heads interlock. Alternate method: Peel the protective liner from one side and attach the mated strip to one surface using a roller to ensure good adhesion, then peel the other liner to expose the adhesive and attach your second surface, pressing down to ensure good adhesion; the pieces can then be peeled apart for access.

Easy to Maintain: Just detach the pieces for easy cleaning and maintenance – fastener can be sprayed out with water or air to remove dirt or debris.

Easy to Replace: To change a sign or replace a panel, remove the original sign or panel and apply a new strip of either 3M™ Dual Lock™ to the new piece as described above, then push the pieces together.

Different combinations result in different holding strengths

Strong: 170:250
Stronger: 250:250 or 170:400
Strongest: 250:400

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.

For thinner applications, see our low profile products including: SJ4570 (clear, indoor use), SJ4575 (black) and SJ4580 (clear, indoor/outdoor use).

Type 170
INDOOR APPLICATIONS

SJ3542 (Black)
Suitable for: Aluminium, Stainless Steel, Acrylic, PC, ABS, Powder Coated Paints, Polypropylene

INDOOR AND OUTDOOR APPLICATIONS

SJ3552CF (Black)
Suitable for: Aluminium, Stainless Steel, Glass, Acrylic, PC, ABS

SJ3562 (Clear)
Suitable for: Aluminium, Stainless Steel, Glass, Acrylic, PC, ABS

SJ3872 (Black)
Suitable for: Aluminium, Stainless Steel, Acrylic, PC, ABS, Powder Coated Paints
Type 250
INDOOR APPLICATIONS

SJ3540 (Black)
Suitable for: Aluminium, Stainless Steel, Acrylic, PC, ABS, Powder Coated Paints, Polypropylene

INDOOR AND OUTDOOR APPLICATIONS

SJ3550CF (Black)
Suitable for: Aluminium, Stainless Steel, Glass, Acrylic, PC, ABS

SJ3560 (Clear)
Suitable for: Aluminium, Stainless Steel, Glass, Acrylic, PC, ABS

SJ3870 (Black)
Suitable for: Aluminium, Stainless Steel, Acrylic, PC, ABS, Powder Coated Paints
Type 400
INDOOR APPLICATIONS

SJ3541 (Black)
Suitable for: Aluminium, Stainless Steel, Acrylic, PC, ABS, Powder Coated Paints, Polypropylene

INDOOR AND OUTDOOR APPLICATIONS

SJ3551CF (Black)
Suitable for: Aluminium, Stainless Steel, Glass, Acrylic, PC, ABS

SJ3561 (Clear)
Suitable for: Aluminium, Stainless Steel, Glass, Acrylic, PC, ABS

SJ3871 (Black)
Suitable for: Aluminium, Stainless Steel, Acrylic, PC, ABS, Powder Coated Paints

Resources

3M™ Dual Lock™ Brochure

Brochure (PDF, 945 KB)
Designing with 3M™ Dual Lock™

White Paper (PDF, 628 KB)
3M™ Dual Lock™ Design Guide for Rail & Bus

Brochure (PDF, 11.44 MB)
Attachment Solutions for Partitioning

Flyer (PDF, 175 KB)
Webinar: how to bond Metal, Foam & Fabrics, Composites, Glass & Wood

Webinar
Automation of 3M™ Dual Lock™ Visit our 360° virtual Lab Tour

Link
Bonding & Assembly

More about various substrates and watch testimonial videos
Bonding Solutions Brochure

Explore the industrial adhesives and tapes bonding portfolio
View (PDF, 5.6 MB)

94 Products

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Industries

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Manufacturing (18)
Design & Construction (17)
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Commercial Solutions (8)
Communications (5)

Product Form

Roll (19)
Piece Part (1)

Backing (Carrier) Material

Polypropylene (9)
Polyolefin (5)

Adhesive Type

PSA (5)
Clear Acrylic Adhesive (4)
Acrylic (2)
Modified Acrylic (2)
Non-Adhesive (2)
Low Surface Energy Acrylic Adhesive 300LSE (2)
Low Surface Energy Acrylic Adhesive (1)
Synthetic Rubber (1)
High Temperature Acrylic (1)
General Purpose Acrylic Adhesive (1)

Overall Width (Imperial)

1 in (9)
0.75 in (5)
0.984 in (5)
1.97 in (3)
0.98 in (3)
4 in (1)
0.5 in (1)
2 in (1)
0.49 in (1)
0.81 in (1)

Overall Width (Metric)

25 mm (13)
25.4 mm (11)
19 mm (4)
50 mm (3)
12.5 mm (2)
12.7 mm (1)
15.87 mm (1)
19.05 mm (1)
101.6 mm (1)
20.57 mm (1)

Product Colour

Black (16)
Transparent (6)

3M™ Dual Lock™ Reclosable Fastener SJ3826, Pop-In Piece Part, Stem Density 250, Black

3M Stock

B40069060

3M Dual Lock Reclosable Fastener Parts with Functional Bases

3M™ Dual Lock™ Reclosable Fastener SJ3706, Pop-In Piece Part, Stem Density 170, Black

3M Stock

B40069066

3M™ Dual Lock™ Reclosable Fastener SJ3731

3M™ Dual Lock™ Reclosable Fastener SJ3220, Pop-In Piece Part, Stem Density 400, Black

3M Stock

B40068999

3M™ Dual Lock™ Reclose Fastnr SJ3871 400 Black, 1inx45yd 0.22in

3M™ Dual Lock™ Reclosable Fastener SJ3871

Options available

3M™ Dual Lock™ Reclosable Fastener SJ3541

Options available

3M™ Dual Lock™ Reclos Fast SJ3753 Press Sen Adh 400 1inx1yd

3M™ Dual Lock™ Reclosable Fastener SJ3753, Roll Good without Pressure Sensitive Adhesive, Stem Density 400, Black

3M Stock

B40068946

3M™ Dual Lock™ Reclosable Fastener SJ3803, Slide-In Piece Part, Stem Density 250, Black

3M Stock

B40069048

3M™ Dual Lock™ Reclosable Fastener SJ3806

3M™ Dual Lock™ Reclosable Fastener SJ3827, Pop-In Piece Part, Stem Density 400, Black

3M Stock

B40069014

3M™ Dual Lock™ Reclosable Fastener SJ3713, Pop-In Piece Part, Stem Density 400, Black

3M Stock

B40069025

3M™ Dual Lock™ Reclosable Fastener SJ3221, Pop-In Piece Part, Stem Density 250, Black, 20 mm x 20 mm

3M Stock

B40068986

3M™ Dual Lock™ Reclosable Fastener SJ3542, Black, 25 mm x 45.7 m, 5.7 mm

3M Stock

B40068909

UPC

04054596272248

3M™ Dual Lock™ Reclosable Fastener SJ3440, Black, 1 in x 50 yd

3M™ Dual Lock™ Reclosable Fastener SJ3440, Black, 25 mm x 45.7 m, 4.1 mm

3M Stock

B40068931

UPC

00021200658082

3M™ Dual Lock™ Reclosable Fastener DL400/4225, Roll Good with Pressure Sensitive Adhesive, Stem Density 400, Black

3M™ Dual Lock™ Reclosable Fastener DL250/4225 Stem Density 250, Black, 25 mm x 30 m

3M Stock

B40068918

3M™ Dual Lock™ Reclos Fast SJ3799 Rigid Back 170 1inx1yd

3M™ Dual Lock™ Reclosable Fastener SJ3799, Roll Good with Rigid Back, Stem Density 170, Black

3M Stock

B40068892

3M™ Dual Lock™ Reclosable Fastener SJ3781

3M Stock

B40068908

3M™ Dual Lock™ Reclosable Fastener SJ3248, Slide-In Piece Part, Stem Density 250, Black

3M Stock

B40068998

3M™ Dual Lock™ Reclosable Fastener SJ3249, Slide-In Piece Part, Stem Density 400, Black

3M Stock

B40068982

3M™ Dual Lock™ Reclosable Fastener SJ3278, Pop-In Piece Part, Stem Density 250, Black, 26 mm x 26 mm

3M Stock

B40069018

3M Dual Lock Reclosable Fastener SJ3463 Round Piece Part 400

3M™ Dual Lock™ Reclosable Fastener SJ3263, Die-Cut Piece Part, Stem Density 250, Black

3M Stock

B40069020

3M™ Dual Lock™ Reclosable Fastener DL400/5361 Stem Density 400, Black, 25 mm x 45.7 m

3M Stock

B40068934

UPC

04064035047733

3M™ Dual Lock™ Reclos Fast SJ3267 Pop-In 250 26mmx26mm

3M™ Dual Lock™ Reclosable Fastener SJ3264, Pop-In Piece Part, Stem Density 250, Black

3M Stock

B40069015

3M™ Dual Lock™ Reclosable Fastener SJ3785, Roll Good with Pressure Sensitive Adhesive, Stem Density 400, Black

3M Stock

B40068886

3M™ Dual Lock™ Reclosable Fastener SJ3749, Pop-In Piece Part, Stem Density 400, Black, 1 in x 1 in, 5000 pieces per case

3M™ Dual Lock™ Reclosable Fastener SJ3749G, Pop-In Piece Part, Stem Density 400, Black

3M Stock

B40069032

3M™ Dual Lock™ Reclosable Fastener SJ3260, Slide-In Piece Part, Stem Density 400, Black

3M Stock

B40069034

3M™ Dual Lock™ Reclosable Fastener SJ3279, Pop-In Piece Part, Stem Density 400, Black, 26 mm x 26 mm

3M Stock

B40069009

3M™ Dual Lock™ Reclosable Fastener SJ3755, Die-Cut Piece Part, Stem Density 250, Black

3M Stock

B40068981

3M™ Dual Lock™ Reclosable Fastener DL400/468MP, Roll Good with Adhesive Transfer Tape, Stem Density 400, Black

3M Stock

B40068970

3M™ Dual Lock™ Reclos Fast SJ3222 Pop-In 250

3M™ Dual Lock™ Reclosable Fastener SJ3810, Pop-In Piece Part, Stem Density 250, Black, 26 mm x 26 mm

3M Stock

B40068995

3M™ Dual Lock™ Reclosable Fastener SJ3781

3M™ Dual Lock™ Reclosable Fastener SJ3758, Roll Good with Pressure Sensitive Adhesive, Stem Density 250, Black

3M Stock

B40068955

3M™ Dual Lock™ Reclosable Fastener SJ3229, Slide-In Piece Part, Stem Density 250, Black

3M Stock

B40069007

3M™ Dual Lock™ Reclosable Fastener SJ3749, Pop-In Piece Part, Stem Density 400, Black

3M Stock

B40068985

3M™ Dual Lock™ Reclos Fast SJ3268 Pop-In 400 26mmx26mm

3M™ Dual Lock™ Reclosable Fastener SJ3268, Pop-In Piece Part, Stem Density 400, Black, 26 mm x 26 mm

3M Stock

B40068984

3M™ Dual Lock™ Reclosable Fastener SJ3767

3M™ Dual Lock™ Reclosable Fastener SJ3261, Die-Cut Piece Part, Stem Density 400, Black

3M Stock

B40069028

3M™ Dual Lock™ Reclosable Fastener DL400/5428, Roll Good with Pressure Sensitive Adhesive, Stem Density 400, Black

3M™ Dual Lock™ Reclosable Fastener DL400/GT6008, Stem Density 400, Black, 25 mm x 45.7 m

3M Stock

B40068944

3M™ Dual Lock™ Reclosable Fastener SJ3290, Slide-In Piece Part, Black, 18 mm x 25.4 mm

3M Stock

B40069031

3M™ Dual Lock™ Reclos Fast SJ3704 Pop-In 250

3M™ Dual Lock™ Reclosable Fastener SJ3811, Pop-In Piece Part, Stem Density 400, Black, 5 mm x 21 mm

3M Stock

B40069045

3M™ Dual Lock™ Reclos Fast SJ3787 Sen Adh 250

3M™ Dual Lock™ Reclosable Fastener SJ3787, Roll Good with Pressure Sensitive Adhesive, Stem Density 250, Black

3M Stock

B40068968

3M™ Dual Lock™ Reclos Fast SJ3700 Slide-In 170 20mmx20mm

3M™ Dual Lock™ Reclosable Fastener SJ3700, Slide-In Piece Part, Stem Density 170, Black

3M Stock

B40069024

3M™ Dual Lock™ Reclosable Fastener SJ3805, Ultimate Pop-In Piece Part, Stem Density 250, Black

3M Stock

B40069063

3M™ Dual Lock™ Reclosable Fastener SJ3762, Die-Cut Piece Part, Stem Density 400, Black

3M Stock

B40068979

3M™ Dual Lock™ Reclosable Fastener SJ3552CF

Options available

3M™ Dual Lock™ Reclosable Fasteners SJ3550CF

Options available

3M™ Dual Lock™ Reclosable Fastener SJ3560

Options available

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3M Mushroom Hook Fasteners

Interlocking mushroom-shaped heads have five times the tensile strength of hook and loop products.

The Fast and Flexible Attachment Solution

Different combinations result in different holding strengths

94 Products