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3M Scotch SJ4570 Dual Lock Low Profile Reclosable Fastener (clear): 5/8 in. x 50 yds. (Clear)
3M Scotch SJ4570 Dual Lock Low Profile Reclosable Fasteners can replace conventional fasteners such as screws, clips, rivets, snaps, hook and loop and bolts in many applications where access or repositioning is needed. Amazingly thin and reclosable, yet strong, 3M Dual Lock Low Profile fasteners are thinner and more flexible than other reclosable fasteners. SJ4570 is backed with 3M 300 LSE Laminating adhesive, giving it an excellent bond to many substrates including polypropylene, polyethylene, metal, finished wood and many others. Used in POP (point of purchase), trade show exhibition and electronics, Dual Lock low profile reclosable fasteners attach ceiling tiles, carpet, seat cushions, trade show graphics, access panels, wall panels and small electronic devices. They are also great for attaching E-ZPass tags to car windshields. 3M typically recommends 4 square inches of fastener per pound of static load for their low profile dual lock products. The 10 foot sizes are cut from longer source rolls and come in a zip-lock bag (only the 5/8 inch x 10 foot size of SJ4570 which is specifically labeled as *retail-packaged comes in a package suitable for resale). Dual lock only has one type of side; unlike Velcro where there is 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. Low profile dual lock has about 700 stems per square inch, but the stems are much shorter than standard dual lock which has either 170, 250 or 400 stems per square inch. They let you make a much thinner joint (an object being mounted would not stick out as far), but it doesn't have the holding power of standard dual lock. However for smaller, lightweight items it is ideal.
Adhesive: acrylic (300 LSE)
Release Liner: 86# polycoated kraft
Thickness: 65 mils (carrier, adhesive) 6.5 mils (liner)
Adhesion: 96 ounces per inch (to stainless steel)
|Average Customer Rating:
|| based on 23 reviews|
Average Customer Review:
( 23 customer reviews )
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Most Helpful Customer Reviews
120 of 126 found the following review helpful:
Expensive & no stronger than industrial strength VelcroAug 13, 2008
The low-profile dual lock is a nice fastener. But it is a lot more expensive than industrial strength velcro and not much stronger, if at all. I recently used both industrial strength velcro and low profile dual lock to put up clear acrylic and chrome spice shelves on the inside of cabinet doors. I did not want to drill holes in the doors so I looked for a strong fastener and experimented putting up 1 shelf with just the velcro and 1 with just the dual lock. Both fasteners did the job well and are strong enough to hold up a shelf plus various bottles without any problem. Each shelf with spices weighs roughly 4 pounds. Here are my observations comparing the two fasteners:
1) The dual lock is three times or more as expensive as industrial strength velcro. With the product here, you get just 5 feet of usable fastener. They give you 10 feet of self-mating dual lock, but you have to use half of it for one side and half for the other. They should make it clear that it's good for only 5 feet of fastening. Velcro on the other hand markets their product correctly. So when they say 15 ft, for example, you get 15 feet of each side -- or 15 feet of usable fastener. So with the dual lock, I got 5/8" x 5 feet of usable fastener for $12 which was what Amazon was selling it at the time. They are currently selling industrial strength velcro for $24 for a 2" x 15 ft length. And you can get it even cheaper if you look around. So it's tremendously cheaper than the dual lock.
2) The low-profile dual lock is thinner and cleaner looking than the industrial strength velcro. So if you need a thin fastener or need a cleaner look, then go with this type of dual lock.
3) The industrial velcro is more flexible. So if you need to wrap the fastener around parts of an object, velcro is the way to go.
Keep in mind that 3M makes many types of dual lock, and the low-profile dual lock is not as strong as regular type 250 dual lock. Type 250 dual lock is much thicker and also much more expensive than the low profile type. But if you have a very heavy object to mount, then that is the type of dual lock to buy. Radio Shack sells type 250 dual lock from 3M under the name SuperLock. On the low-profile dual lock package, they recommend 4 square inches of fastener per pound of weight. But with type 250 dual lock you can attach 4 lbs per square inch. That will give you an idea how much stronger type 250 dual lock is.
So, from weakest to strongest, here is how I rate commonly available fasteners 1) regular velcro 2) low-profile dual lock and industrial strength velcro 3) Type 250 dual lock.
Bottom line ... since low-profile dual lock is so much more expensive than industrial strength velcro and not noticeably stronger, I would suggest using the low profile dual lock only for applications where you need a really clean looking or thin fastener. Otherwise, industrial strength velcro can get the job done just as well and much more cheaply.
I gave this product only 3 stars because 1) they don't make it clear that the 10 feet of self-mating dual lock is good for only 5 feet of application and 2) I don't find it any stronger than industrial strength velcro but it's much much more expensive.
7 of 7 found the following review helpful:
Works Great !!Nov 24, 2008
By David B. Burch
I bought this product to hold guitar effects' pedals onto a pedal board. So far it holds very well. Much better than plain Velcro. The sticky part on back is extremely strong.
6 of 6 found the following review helpful:
An improvement over VelcroFeb 22, 2008
By Jay Keller
Stronger, cleaner (no-fuzz), and both sides are identical. 3M has created a Velcro substitute that is, for many applications, a big improvement over the original.
7 of 8 found the following review helpful:
3M Dual LockMar 18, 2010
This is a great product, it does hold tight and the tape is removable. My husband uses it to hold his tray that, holds all his electronic gadgets that are needed with truck driving. I recommend this product.
4 of 4 found the following review helpful:
What I NeededMay 16, 2010
By Michael A. Mccollum
I live in Arizona and have added a number of electronic gadgets to my truck. Mounting them has always been a problem. When I use Velcro, the glue on the back melts during the hot summer and the gadget falls off of wherever I have stuck it. This product has glue on the back that withstands the summer heat (so far), allowing me to simplify and beautify my add-ons.
See all 23 customer reviews on Amazon.com