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3M Dual Lock SJ3550 Reclosable Fasteners Heavy Duty, Hook & Loop Strip Black 1 in x 3.28 FT. for Indoor/Outdoor Use, Great for Metal, Glass, Acrylic, PC, ABS.

Free shipping on orders over $29.99

$11.99

$ 5 .99 $5.99

In Stock

About this item

  • 1.【 It has a wide range of uses】: Suitable for the installation of metal, PVC, wood, plastic, ceramic tiles, aluminum frames and other materials, such as industrial assembly, car interior decoration, sign fixing, advertising fixing, etc.
  • 2. 【Strong adhesion】: 3M mushroom buckle adopts wear-resistant substrate, strong adhesion and strong stickiness. Therefore, it has the characteristics of strong weighing ability
  • 3.【 High temperature resistance】: Short-term temperature resistance 150℃, long-term temperature resistance 90℃, not easy to fall off under high temperature
  • 4. 【There is no residual glue】: Which can replace traditional screws, rivets, electric welding and other fixing methods. The surface of the product is beautiful, smooth, and the sealing effect is good.
  • 5.【 Easy to install】:Just peel and paste each surface of the 3M double-lock reclosable fasteners, and then press the 3M double-lock reclosable fasteners together to easily fix the two surfaces



Product Description

heavy duty tape
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High-Density Micro-Interlocks‌

Surface features ‌250 mushroom-shaped micro-protrusions per square inch‌, creating a ‌bidirectional interlocking mechanism‌ that delivers ‌5x higher shear strength‌ compared to traditional hook-and-loop fasteners.

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Mushroom-Head Interlocking Structure‌

Compressible foam compensates for substrate irregularities (e.g., textured surfaces) and distributes stress to prevent peeling.

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Flexible Stem Design

The tapered stems of the mushroom heads flex during compression, enabling secure mechanical engagement while allowing ‌1,000+ reuse cycles‌ with retained holding power (up to 50% of initial strength post-reuse).

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Clean and Simple Process‌

  • No Surface Pretreatment‌: Bonds directly to substrates without sanding, priming, or chemical activation.
  • Residue-Free Removal‌: The reusable interlock design allows ‌non-destructive disassembly‌ for maintenance; adhesive remains intact on one side for reattachment.
  • Hand-Press Installation‌: Bonds securely with ‌manual pressure‌ (15-20 psi for 10 seconds), eliminating the need for clamps, heat guns, or hydraulic tools.

Color: Black

Width: 1 inch

Length: 3.28 feet

Remind: Not mated, The total length of the product is 3.28 inches, which is the length of one piece of material. Because two pieces of material need to be overlapped to use, the actual length used is 1.64 inches, so please compare the length to be used before buying.

The 3M mushroom buckle is composed of two plastic backing materials. There are mushroom-like plastic protrusions on the backing material, which is the mushroom head. When the two pieces of the mushroom buckle are pressed together, the mushroom heads will lock each other and make a crackling sound.

Steps for usage:

1. Thoroughly clean the surface of the adhered part, remove oil, water and dust, etc., and wait for it to dry

2. Please use scissors to cut two pieces of tape of the same length with scissors as needed

3. Use scissors to take two pieces of mushroom buckle, recombine and determine the sticking position, and then tear it apart

4. Tear off a piece of buckle release paper and stick it on the surface to be pasted, then tear off another piece of buckle release paper and stick it on the object, pressing back and forth for 2 minutes.

5. After standing for 24 hours, reclose the mushroom buckle

Note:

1. The recommended working temperature is 20-38℃, and the workin temperature after bonding is -40℃—93℃.

2.3M double-lock tape is not obvious to the touch after tearing off the release paper. This is the characteristic of 3M glue. It needs a certain amount of force and continuous pressing to release its stickiness. It is recommended to stick it for 24 hours before making it heavy.

3. Do not hang valuables, fragile and dangerous items, so as to avoid improper operation and fall to you and cause loss and inevitable.


Darren Ferreira
Reviewed in the United States on February 2, 2025
I love this stuff. It is so strong. I've actually used it to hang studio speakers in my office. It comes in handy for so many projects.
Rick Coty
Reviewed in the United States on February 19, 2025
this is the nicest velcro system ive ever used, very sticky adhesive surface ,and when the velcro surfaces are joined together, they will not come apart easily ,very good hold
Claude62
Reviewed in Canada on July 20, 2024
A must have. Hold very well. Very useful when you want to avoid screws or nails like in a RV/Motorhome. Super fantastic product from 3M.YES recommend 100%
Coffee_Frap
Reviewed in the United States on July 11, 2024
I love this stuff. Mounts 2 things together live Velcro, but isn’t loud when separating and doesn’t wear out. I have this stuff mounting a fairly heavy external battery to my motorcycle helmet, and it feels sturdy and I have no fear of it getting ripped off by the wind. Adhesion is great if you properly clean the surface you’re sticking it to. A little pricey, but good stuff.
Steve
Reviewed in the United States on May 17, 2024
I have been using this product for years. Before Amazon I got it from the iTape store. I have over a dozen ceramic tiles attached to the walls of my RV, all by Super Lock tape. None have fallen off after 100,000 miles.
Black Raven 777
Reviewed in the United States on January 29, 2024
AWESOME
Dave
Reviewed in the United States on September 14, 2023
I just mounted the dual lock on my guitar pedals so it runs perpendicular to to the dual lock I stuck on my pedal board, and it holds great. I transport my pedal board between home and church a couple times every two weeks, and it has held tight for months now - unlike the plain velcro I had to use on my old board
W. D. Greason
Reviewed in the United States on August 27, 2023
best velcro style tape there is for heavy hold use.
Terrance
Reviewed in the United States on November 14, 2023
Adhesion is unbelievable. I ordered the most aggressive tape. It can be pulled apart but not easy. I use it for panels in a van conversion that won’t be removed constantly. This strong stuff is not for cabinet that will be opened regularly. The panels will not open unless I went off a cliff, in which case it would,Deb the least of y worries. Incredible convenient compared to latches, screws, etc..
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