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Heat-shrink tubing is used to insulate wires, providing abrasion resistance and protection for stranded and solid wire conductors, connections, joints and terminals in electrical work.
It can also be used to repair the insulation on wires or to bundle them together, to protect wires or small parts from minor abrasion, and to create cable entry seals.
Features of RockDIG 3:1 Heat Shrink Tubings:
- Material: Polyolefin
- Starting shrinkage temperature: ≥ 70 ℃
- Full shrinkage temperature: ≥105 ℃
- Operating temperature: -45 ℃ to 125 ℃
- Tensile strength: 10.4Mpa
- Dielectric strength: 15 kV/mm
- Voltage: 600V
- Flammability: Flame Retardant
Features:
3:1 Heat Shrinkage Ratio
- The heat shrink tubing will recover to 1/3 of its original diameter. Using heat gun is recommended as the diameter is large.
- 3:1 Heat shinkage ratio makes it can be used in more applications than 2:1 heat shrink tubings.
Dual-Wall Glue Inside
- With a layer of internal adhesived glue inside it, the shink tubing could adhere to wires and termianls more stronger than 2:1 shirnk tubing. It provides higher performance of sealing.
- Recommend using a heat gun for better shrink performance.
Waterproof Sealing & Insulation
- The adhesive lined heat shrink tubings are with great sealing capability for a wide variety of electrical applications, including automotive and marine wire harness, wire splices, breakouts, and connector-to-cable transitions.
Applications:
4 Large Sizes for Copper Wire Lugs
Use Φ1 3/4 1/2 3/8 inch heat shrink tubings for AWG 2/0 1/0 2 4 6 8 electrical Wires
3 Small Sizes for Ring Fork... Terminals
Use Φ1/4 3/16 1/8 inch heat shrink tubings for AWG 22-10 solid and strands wires.
To repair the insulation on wires
It can also be used to repair the insulation on wires or to bundle them together.
How to use it?
- Choose the size of the heat shrink tubing: measure and make sure the diameter of the wire is larger than 1/3 diameter of the heat shrink tubing.
- Then insert wire to the heat shrink tubing, use a lighter to heat if the tubing is small size, use a heat gun to heat if tubing is large size until the wire is wrapped tightly.
We recommend using a heat gun with this product. Do not use a flame (lighter, torch, etc.) to activate the heat shrink. Fire can potentially damage the tubing. Please don't touch the tube until it cools completely.
Jason
Reviewed in the United States on February 10, 2025
I had a broken vacuum hose and after sealing the break with silicone tape, this went over it as a very strong protective layer.
CA
Reviewed in the United States on July 4, 2024
These worked great for I used them for, which was non-electrical. I made some antenna mast guy "wires" using 3/16" starter rope and wrapped the end around a rope thimble to form a loop. I used this shrink tube to secure the end of the rope. I used a mini heat gun with the high (800 degree) setting, the tubing shrank right down and everything is secure.Did not encounter any of the issues mentioned in other review, it's not thin or fragile stuff, it shrank down without any difficulty. The length of the tubing in this set runs from 1-3/4" to 3", depending on the diameter size.What you see in my pic is a 3" piece cut into two 1-1/2" pieces.
Big Willie Time
Reviewed in the United States on June 13, 2024
These heat-shrinks are really great! They’re thick & durable and shrink to a ration of 3:1 (or more)! They’re easy to use and take no time at all to heat up
Aaron M
Reviewed in Canada on May 13, 2024
Super easy to use. I tend to use these clear tubes to cover labels for wires so it’s important that they shrink with low heat and seal really well. They do exactly that.I’d buy them again.
the op amp guy
Reviewed in the United States on March 20, 2024
Inexpensive heat shrink, good for Hobbies, Electronics and simple coverage for wire splices or end cable connectors.
Malcolm
Reviewed in the United States on October 26, 2024
Fabulous product thanks for the product
Scott Sheedy
Reviewed in Canada on June 23, 2022
What a handy pack of heat shrink tubing. So many sizes and the shrink worked perfectly every time. I used them installing a new Lowrance HDS unit in my boat, and adhesive heat shrink is a must for marine/high moisture applications and these worked great!
Jo
Reviewed in Canada on May 7, 2022
Fidèle à la description !
Customer
Reviewed in the United States on May 29, 2022
Good assortment
C
Reviewed in Canada on September 27, 2021
Shrinks tight...the way you want it to....
Daniel Syverson
Reviewed in the United States on March 3, 2021
Pleasantly surprised. Went to cover some 4ga battery lugs and the tubes looked way too big. Tested one by putting it on a screwdriver. I didn't expect it to shrink that much, but wanted to see how far it went. It shrunk all the way down and glued to the screwdriver. Very pleased. Good thickness - nice and heavy over the lugs. Another nice feature - they are so big you don't have to remember to put the shrink on before you crimp the connector - plenty big enough to slide on after you crimp. Haven't checked, but I would also like some that are a bit smaller, for smaller gauge wires (18-20ga tefzel, unshielded, for example.)
Customer
Reviewed in the United States on February 12, 2021
maybe I'm shrinking them too fast, but if you have any kind of irregularity underneath there's a very high change the sleeve will tear as it shrinks over the irregularity. I feel like a little more thickness might help. That said, they adhere great due to some glue or other kind of bonding compound inside the sleeve. I've only used the large diameter ones on battery cables for industrial equipment. I suspect the small diameter ones may be less prone to the tearing problem just due to less % shrinking
owen t.
Reviewed in Canada on October 31, 2021
Quality
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