Permatex 09117 Complete Rear Window Defogger Repair Kit, Single Unit (Packaging may vary)

I got this because I had two lines not working on the back window of my car. It came with both a repair kit for the the printed lines on the windows and a glue kit for the tab that connects the printed elements to the electrical system.In my case the lines were not working but the break wasn't a gap in the line. Instead you could see where it was discolored on the outside of the window. I used the kit an painted it in, and saw that it had filled in the discolored spot. After letting it dry I tested it out and my the two formerly non working lines worked again. Others comment the color doesn't match. True enough, but it does do the job. I used Frog Tape to keep my lines clean when I painted them on.I thought I didn't need the tab glue but then my Jeep's rear defrost wasn't working at all. It turns out the tab had fallen off. I didn't have an ideal connection point for gluing it back but I cleaned it up followed the instructions and glued the tab back on. After that the defrost on the jeep worked. For me that was a nice bonus since I hadn't gotten the kit for the tab repair.The photo shows one of my repairs. I taped wide intentionally due to the kind of discontinuity in that spot. That may or may not have helped with the repair.Overall it seems expensive but it works.

I accidentally scraped through a trace on the rear defogger of my F150 trying to remove a sticker the parts supplier stupidly stuck right over a line, and the dealership, equally stupidly, did not remove upon receipt. The brief time on the lot in the hot sun turned the adhesive to stone that nothing would dissolve.Permatex to the rescue! The kit comes with everything you need, and the instructions are well-written and easy to follow - even in the tight confines of the back of a pickup cab. The repair blends right in and, so far, everything seems to work just fine!

So this item is a good product. However, the item was missing a component. I had to contact the brand themselves to see if they could send me a replacement piece which they did.

I was skeptical that this would work as described since it had so many mixed reviews. I found the reviews a little deceiving as this is actually two separate repair solutions in one kit. One of the solutions (the one I did not use) is to re-attach a broken "tab" that connects the main power line to the defrost grid. The other solution is the grids themselves. This product worked well for bridging broken grid lines back together. I used blue painters masking tape rather than the one (1) supplied mask since I had several breaks on five different grid lines to repair. I followed the instructions to a tee and the conductive paint worked great. There was enough in the small bottle for my seven breaks with a little left over. After 30 minutes I removed the masking tape and after another 24 hours I ran the defogger to test it. I could feel with the back of my fingers that each individual grid line was now heating up. The most difficult part was placing the masking tape on the window such that there was a small enough spacing for the grid lines. My window is angled and hard to reach the furthest grid lines toward the back. With some patience I was able to get it. The color of the paint is slightly lighter than the original grid material but not noticeable from the inside of the car. It is slightly more noticeable from the outside, but to me still worth it to have a functioning defogger again. I am more careful now when cleaning the back window to (hopefully) not disturb the repairs. I can't speak to how long the repairs will last and will update this review if I start to see failures.

I only needed to repair one defogger tab, and it worked - but only for 4 days. For the record, I obsessively kneaded the adhesive before using it, and I let it cure for two full days before switching it on. The tab held in place well after holding it for just one minute on the treated grid area. It worked fine the first day I powered it up, but appeared to get less effective each day, until after the forth day it was not working even a little bit. The tab remains strongly attached to the window though. I don't think the glue has enough metal particles in it.Note that the tab repair portion of this kit is for one-time use. There is enough adhesive to repair several tabs, but because the adhesive is in a tiny tear-open pouch and the special activator wipe will not last once opened, you'd have to perform all of your tab repairs in quick succession. You must apply the tab with glue within 15 minutes of the activator drying.I did not need the grid repair portion of the kit, but it does come in a reclosable bottle and does not require activation, so it should be usable on multiple occasions. I may try using it to paint over the tab attachment point.