Getting 18% shrinkage is very good by industry standards.
What didn't work well, was my "tie a knot" or "zip tie" at the end of wrapping. So I was going to return this product until I took the seller's advice, and researched how to use this product, but now, after purchasing.
The cost is too high for my budget but needed it too much. So NOT a good value. There must be cheaper offers out there.
I used this product on a broken electrical-cord Insulation for a Kirby vacuum cleaner. Found out that I Should-have melt the 'end' first with a high heat source (cig -lighter, candle, propane torch, or soldering tip), then quickly press this melted end on the already wound-up work done. This will "finish" off your work well, where the final end will not unravel itself.
What DID work well was the shrink percentage of this product. I did a simple experiment of heating a 12-inch strip of this product, then hung three inches in front of a very hot Infrared radiation quarts heater that glows RED on HIGH. The original 12 inches shrank down to 9.75 inches in length. That is an 18.75% shrinkage which is on the high end of most shrink specifications for this type of material., that boasts 20% max of (Machine Direction) shrinkage.
The trick is to be cautiously aggressive in your heating. If you use a Hair-Dryer, set to high, but "CUP BEHIND" the area you want to shrink, so the hairdryer's airflow bounces back onto the focused area of the (back of) tape. This greatly helps increase heat from the hairdryer that blows a lot of air on the high setting. DO NOT restrict too much of this airflow from your particular hairdryer. You will know when your hairdryer shuts off from overheating OR, the sound of the fan speed drops more than 75% in sound/pitch/vibration. A better source of heat is a NO-BLOWER heat source. Find yours.
OH . . . . tape surface (that you already wound) should get shiny/glossy. Even a little bit of smoking/steaming will tell you, that particular area got hot enough. Turn your repair "over" or "around" and repeat applying heat for that shine and just a tad/bit of smoke/steam if you want to make sure.
Remove heat source IMMEDIATELY at the very first sign of smoke/Steam. This smoke might even be a small amount of WATER LOCKED IN the tape at the time of manufacturing. So, be confident that you may not be burning the tape. Just releasing moisture for a more pure plastic wrap you just did. Again, some of it is also carbon smoke I suspect, just DO NOT let carbon smoke be the majority of this off-gassing. This tape should melt first before excessive carbon gassing.
SO,... . To be safe, and not waste all the wrapping work you just did by melting it, I suggest you be satisfied with a glossy/shiny tape surface which may be a 10 to 15% shrinkage. This is still a good amount of shrinkage.
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