Because it's mated, is the actual usable length 1/2 of the length listed?

Yes. This product is all I use on my pedalboards.

is the length described refering to the actual mounting length? or in reality one gets half because you need to use two pieces of the tape?

It is the actual length of the roll. There are different types of Dual Lock, allowing a person to mix and match types allowing for different amounts of adhesion between two devices. As an example, you may want less adhesion for a removable TV remote control mounted to a wall, vs mounting a IP-TV permanently to a surface behind the display. This is doble by mixing and matching Dual Lock products.

Does the adhesive get soft when it warms? I want to use in a window to hang foil/foam insulation. Hook/loop adhesives tend to let go when sun hits it.

It will if exposed to direct sunlight.

Hard to say without knowing the intended application. The construction of the hook and loop is entirely plastic so yes there. The adhesive is very strong however I doubt it would withstand constant submersion. If were talking a bit of rain here or there. I'd bet it would last through a season, depending on the application surface. Make sure its clean and dry and kept dry for a few days until it is "set". Hope that helps

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3M Dual Lock SJ3550A 1"×8ft Black Reclosable Fastener Mounting Tape 1 Pack

3M Dual Lock SJ3550A 1"×8ft Black Reclosable Fastener Mounting Tape 1 Pack

Product ID: 298927759

Details

Brand
Bulina
Color
Black
Material
Acrylic
Size
1"×8ft
Style
1 Pack

💧Waterproof & UV resistant for outdoor durability

🔒250 interlocking stems/in² for ultra-strong hold

🌡️Withstands temps up to 200°F (93°C)

R1028

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Description

🔗 Lock it. Load it. Love it. The ultimate fastener for the fast-paced pro.

ENDLESS APPLICATIONS - Perfect for mounting everything from pedalboards and power strips to outdoor décor and surveillance gear—join the pros who trust 3M Dual Lock.
MULTI SURFACE BONDING - Special synthetic adhesive bonds seamlessly to metals, plastics, glass, wood, and painted surfaces without residue.
WEATHERPROOF VERSATILITY - UV resistant and waterproof design ensures flawless performance indoors, outdoors, and even in marine or automotive environments.
FAST CLEAN INSTALLATION - Achieves 90% strength in 24 hours with easy peel-off removal using alcohol spray—no damage, no mess.
INDUSTRIAL GRADE STRENGTH - Mushroom-shaped stems lock tight for reliable, repeatable fastening that outperforms traditional screws and bolts.

3M Dual Lock SJ3550A is a premium reclosable fastener tape featuring 250 interlocking mushroom-shaped stems per square inch, delivering industrial-strength bonding that withstands temperatures up to 200°F and resists water and UV exposure. Designed for versatile indoor and outdoor use, it bonds cleanly to a wide range of surfaces including metals, plastics, glass, and wood. Ideal for professionals and DIYers alike, it offers a durable, reusable fastening solution that’s easy to install and remove without residue.

Specifications

ASIN	B08R3BFZ27
Best Sellers Rank	#2,603 in Office Products ( See Top 100 in Office Products ) #37 in Mounting Tape
Brand Name	Bulina
Color	Black
Customer Reviews	4.6 4.6 out of 5 stars (878)
Item Highlight	Interlocking Mushroom Shaped Strong Adhesive Hook Lock Sticky Tape Waterproof for Indoor and Outdoor, EZ Pass, Pedalboard
Item Type Name	Dual Lock Reclosable Fastener
Item Weight	3.52 ounces
Manufacturer	Bulina
Manufacturer Part Number	US-3550A
Material Type	Acrylic
Model Number	3550A
Mounting Type	Adhesive
Number of Items	1
Number of Packs	1
Recommended Uses For Product	Attaching signs or nameplates, securing cables, bundling items, indoor and outdoor use, and in various environments and conditions
Size	1"×8ft
Style	1 Pack
UPC	744119540797
Unit Count	8 Feet
Warranty Description	No Warranty

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R1028

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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