Heat Shrink Tubing Kit - 3:1 Ratio Adhesive Lined, Marine Grade Shrink Wrap - Automotive Industrial Heat-Shrink Tubing - Black, Red - 400 PCS

This heat shrink tubing kit is excellent quality and a must-have for anyone working with wiring. The 3:1 shrink ratio is perfect—it shrinks down tightly and evenly, and the adhesive lining creates a waterproof seal that feels professional and long-lasting. I’ve used it on automotive repairs and small electronics projects, and it holds up very well. The assortment of sizes is generous, covering just about any application from small gauge wires to heavier connections. The material feels thick and durable but still shrinks smoothly with a heat gun. Once cooled, the tubing is tough and resistant to pulling, moisture, and abrasion. I also appreciate that the kit includes 400 pieces—it’s plenty for multiple projects, and the organized case keeps everything sorted. The black and red colors make it easy to keep track of positive and negative wiring, which is a nice touch. If you’re doing automotive, marine, or general electronics work, this set is an excellent value. Strong seal, reliable quality, and easy to use—highly recommended

Black, Red - 400 PCS - This is good stuff. The 3 to 1 shrink ratio solved my usual problem with other heat shrinks. I like connections that are strong, physically and electrically very robust, so I often times use a parallel connector rather than a "butt" connector. Parallel connectors are kind of fat. With 3:1 shrink ratio I can pick a shrink tube size that fits over the fat connector and still shrinks down tight over the wires. I use it pretty much everywhere though, not just on parallel connectors. I do like the adhesive. It is very strong and grips onto the wire insulation very well, so if your wire gets pulled severely by something, the connection is just about as strong as the wire itself. I use this on automotive wires and any other project I have going. I checked the adhesive strength by putting 2 wires end-to-end butt-connector style without the butt connector. The wires weren't even touching each other. Just sitting end to end with heat shrink over. Shrunk it, then tried to pull them apart a couple minutes after they cooled down. Couldn't really do it. That was with ~ 16 gauge GSX type automotive wire. The only "disadvantage" I can think of is that it doesn't shrink as fast - I mean you have to heat it a little longer to shrink it, compared to the regular 2:1 stuff with no adhesive. I'm using a proper 2-settings hot air gun made for this purpose.

Very nice. Works great.

Great feel to them, great shrinkage, good glue. I say "good on the glue because in one application of many, on a garden hose that burst it's inner sleeve, the glue has deteriorated under harsh sun, weather and lots of handling. That's probably still great then but it has deteriorated so 4 stars. On static wires, the glue has held. The variety is great too. These are amongst the best tubing I've ever used. One type more rubbery and flexible (again, the 4 stars on this one) but really no complaints with these.

I used this when installing a charging system for our VW Bus solar setup with Li battery. It made all of my connections secure, clean, and professional looking. Super easy to use and the variety of sizes helped a lot.

Does a great job, well worth the price

I never knew "marine" grade heat shrink tubing existed until a neighbor enlightened me. So, I searched Amazon and bought this kit for the "Pros" listed below, plus the good Amazon review score. My video shows the ease of use and my photo shows the cooled connection with a thin bead of hardened adhesive between the wire and the tubing. That's where the waterproofing comes from. Pros: Kit includes several tubing diameters that will work with the most common wire gauges. The quantity of each size is very generous - 360 pieces may last me the rest of my life! The 3-1/2" length of each piece is enough for most needs. The adhesive lining provides a secure and waterproof connection. The carrying/storage case is a big plus and makes it simple to find the optimal sized tubing. The 3:1 shrink ratio pretty much guarantees a good seal. Cons: None that I am aware of. In summary, I've had non-adhesive shrink tubing allow the wires to pull loose from the connection many times because the tubing didn't form a tight enough bond to the wire. The adhesive liner with this tubing solves that problem. I wish I had discovered this type of heat shrink tubing long ago! Even when a wiring connection does not need to be waterproof, the adhesive adds greatly to the strength of the joint. You can't go wrong with this kit.

This heat shrink is excellent - I like how it's adhesive-lined, and in my experience it shrinks very evenly. I use a cheapo heat gun from Harbor Freight and have no issues with this heat shrink. Set it to low heat, use one of the diffuser attachments that comes with the heat gun (I use the one that looks like a square flat plate to help direct the heat more evenly) and just twist the cable a few times to heat it evenly. I think the length (1.5" per piece) is a little bit long, but that's OK as I just cut off the bits that I need. Red and black are universal colors, so even if a wire is "white hot", I will heat shrink it with red to prevent confusion in the future. This has served me well so it works out really good for my use.

I got this kit to do some electrical work on my truck like adding some lights, and it has worked out great so far. There is a good selection of sizes, though a couple of the sizes and colors are mixed due to the number of slots in the tray. The tubes shrink well with a heat gun and they have an adhesive that melts to create a good waterproof seal, similar to hot glue, which sticks well but can be removed if you make a mistake. The tubes are approx. 2" in length, so for a lot of applications you would only use half a tube. The 3:1 shrink ratio is great because it means you may be able to use a larger size tube for a given application even if you've run out of the size that fits the closest. I don't know when I will run out, but when I do I will definitely buy this kit again!

Fait bien la job voir photo

Will always make sure these are in my toolbox they worked great

Good price great variety

A large assortment which is great from very small to quite large. Has glue to make it a permanent repair.