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3M SJ3551 Dual Lock 400 Reclosable Fastener is a general-purpose black reclosable fastener with 400 stems per square inch, an engaged thickness of 0.23 inches and a closure life of 1,000. This black fastener has mushroom-shaped stems on a polypropylene carrier which is coated with a white, general-purpose acrylic pressure-sensitive adhesive. Type 400 stem density fasteners can mate to type 170, 250 or 400 fasteners (the higher the combined number the greater the closure strength). Mushroom-shaped stems on one side of the fastener interlock with identically shaped stems on the other side for 5X greater closure strength than hook and loop. This sometimes ships as SJ3551CF which has the same product specifications but has a clear release liner instead of a white 3M release liner.
Dual lock type 400 fasteners are designed to bond to metals, glass, and medium-to-high surface energy plastics and paint. They can replace conventional fasteners such as screws, clips, rivets, snaps, hook and loop and bolts in many applications where access or repositioning is needed. Used to attach doors, access panels, signs, cushions, wall headliners, display components, city bus light fixtures, ceiling attachment, privacy curtain rails, sunroof trims, and wall panels. Also for POP (point of purchase), trade show exhibition and electronics, and for attaching E-ZPass tags to car windshields.
Dual lock only has one type of side; unlike velcro where there are a separate hook and a loop side; so rolls are typically cut in half and then mated or connected so a 10-foot roll would be used as two 5-foot strips. Country of Origin: United States.
Larry Shindeldecker
Reviewed in the United States on January 23, 2025
As described.
Baltofloridad
Reviewed in the United States on May 10, 2024
The strength combined with a lower strength is perfect. Unless you need to secure a runaway train, this is perfect in combination with a lower strength
WCB
Reviewed in the United States on March 21, 2024
I used this product to hold together two large sections of an acrylic bathtub which had split apart due to warping of one. (Could not be glued or held together with screws)
Customer
Reviewed in the United States on October 28, 2024
I use four 1/2 inch squares for each guitar effects pedal I use on my pedal board. Well technically eight since I need them on the board and the pedal. With just two pedals secured the board I can pick the entire thing up.
TomBo
Reviewed in the United States on October 19, 2024
Great for many applications. Easy to work with. Very durable.
Todd
Reviewed in the United States on March 28, 2022
Great product. It definitely holds. Price was a little high but it does work.
Ralph Mercuro
Reviewed in the United States on December 3, 2022
Very strong bond when paired with SJ3550.
ROBERT TABOR
Reviewed in the United States on August 23, 2020
PRODUCT WAS TWO (2) FEET SHORT AND HAD A TERRIBLE TIME GETTING IT PROBLEM TAKEN CARE OF, STILL WORKING ON PROBLEM WITH AMAZON.
Yves Allard
Reviewed in Canada on December 4, 2017
Excellent
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