When I first got a piece of tubing out of the case, I would have sworn to you that it wasn't adhesive heat shrink tubing. But I did a test and you can see the adhesive oozing out of both ends after heating. You can't see the adhesive in the tube before heating as you can apparently with some other tubes, but rest assured if you want adhesive heat shrink tubing, you are safe ordering this.

I used some of these on my Ford Explorer to do some wiring underneath the hood. They definitely have a glue on the inside that once you begin heating the material you can see the glue come out the ends. Should last a long time.

I bought these to be put onto wires that may be subjected to water under the hood of vehicles. You can visibly see the where the seal forms. Works very well.

Not really sure how I am supposed to give stars on "warmth" for an item with no heat source haha. These are as advertised. Great set for general purpose needs. Epoxy lined as best as I could tell. Didn't always see a little bit come out the bottom but saw it enough to trust it.

I hesitated before i bought these, due to the price, but all the five star reviews persuaded me. I was so glad I chose these after using them, they are manifestly superior even to the nice ones I previously purchased. These soften and grip very smoothly easily firmly. Thank you fellow Best Buy reviewers!

These are definitely not 3:1 shrink ratio. I'd be hard pressed if they were 2:1. All in all they did the job and the price is right

Lots of choices, easy to use. I purchased these to repair and iPhone lightning cable and it worked like a charm. It was an easy 5-minute fix.

I bought a boat that was wired with standard fittings (no heat shrink). Instead of cutting off all connectors, and putting new ones on, I took the new tubing and slit it so I could then just put it over the wire and base of the fitting. A little heat and it sealed perfectly. Saved a lot of time.

I have had experience with this product when I used to have to do repairs on the electrical systems on my sailboat. This recent purchase is because I am rebuilding a 1971 VW Beetle and a lot of the wiring is exposed. My plan is to see how well it works for the wiring that I know will be damp or exposed to the elements.

The heat shrink is good quality, at a pretty good price. It provides a good amount of heat shrink to suit the sizes of wires most commonly used. I bought one, and came back to buy more because it's good.

not sure if these really hit the 3:1 as in the comments, seems more like 2:1. Would have thought the package to be a bit more organized for sizes, but it seems like they cram everything in there. Could not say if any are "missing" nor can I really quickly tell the sizes apart, but overall its fine.