Permatex 21351 Electrically Conductive Rear Window Defogger Tab Adhesive

Let me start with saying that regardless of what are some bad review, it works and it worked very nice for me! Obviously you need to take care of the surface by cleaning it. Follow the simple instructions exactly as they say, and you won’t regret this product! Applied activator after having cleaned surface and the lil connector that need to be stick to rear windshield, let it dry a while (5min), apply conductive glue to part and keep it for a 1min. It worked even though in a vertical position and gravity didn’t bother glue and was perfectly stuck! After 24h it should be fine to use, I personally waited more before using the rear windshield heater. Very nice and good product! Will add some photo, and trust me some idiot before soldered that connector and that’s why it came off and I had to clean the part with a solder to clean it properly from tin soldering residue. Anyway it was easy to use as well and functional, it’s already been 2 weeks and still fine. Will post photos.

Needed to reconnect my rear window defroster ('14 Suburban). I had the other one fixed by the dealer when I bought the car and they made it sound like such a big deal and it took them weeks to get the conductive epoxy they said they needed. This came quickly and was very easy to do. It's been about two months now and my rear defroster is still working great! I love that they package the wipe in such a way that you don't have to hold the chemical prep wipe in your hands. Totally worth it!

Based on feedback I took time to really clean the contact point on the wiring and glass. Followed the instructions with those cleaning instructions, kneeding the material, etc. It is very fluid, I was expecting it to have been a little thicker. No worries, I was able to dab a little on the glass point of contact and then put some on the wiring contact. Not being my first rodeo, I had a small clamp standing by which I gently clamped down until the wiring contact was firmly against the glass but not so much I would risk breaking the contact or the glass. It was mid 70's F and 40% humidity. I left the clamp in place for 7 hours, the glass in the up/open position. After I took the clamp off, the epoxy had a few weeks to cure as the temps were still warm. The first morning I had moisture buildup due to the overnight temps I tested my rear defrost, it worked and I was very happy.... until the next time I tried it. The second time, nothing. It failed. I checked the fuse (it is good) I have voltage running to the contact but nothing is happening. The contact is still firmly epoxied in place, it has not moved and will not move. Something is up with the epoxy that after the first run it seems to no longer be conducting. The TLDR; version: Took excessive steps to prep and install, worked once, now no longer works.

Works great for a 2015 gmc Yukon Did exactly what the package said and no issues

I bought this last winter when my defrost tab broke away from the grid in my '97 Civic. I am grateful to the reviewers who pointed me to the Permatex video instructions for their Complete repair kit on their website. Those video instructions give about three extra steps not included on the back of the box, but that are apparently essential to properly use the product. So, my initial step in the reparation process was to watch the instructional video several times (the tab repair portion begins about half-way through the video). The first step is to remove the tab from the wiring harness. This was not easy. I couldn't get it out with my bare hands and had to use needle nose pliers to gently pull it out. The second step is to remove the excess conductive material from the tab. The tab to my '97 Civic is not straight. The two ends that contact the defrost grid are lower than the middle portion. This made removal of the excess material tricky. I tried with sandpaper, but ultimately turned to my Dremel with a grinding bit. The tab heats up, so I ended up gently holding it with my pliers while I removed the excess conductive material. I wasn't able to remove all of the material--especially in the indentation in the middle of the tab--but since it looked like I had reached the metal of the tab on the ends, I called it good enough. The third step is to use rubbing alcohol to wipe down the surface of the tab and also the connection area of the grid. While the box instructions do not explain this, the video points out that you should not attempt to mount the tab where it was broken off--you are going to want to mount it on an area of the grid where the grid wasn't broken. The connection area for the grid of my '97 Civic is much smaller than what they show in the Permatex movie. Thus, my tab still touches slightly the area where it was broken off, but it still has enough "new" surface to make a good connection. You also don't want to place the tab too far towards the edge of the glass, because you might not be able to put the wiring harness back on if you do not leave enough space. Returning to the cleaning with rubbing alcohol step, when you rub the connection area of the grid with rubbing alcohol, you will notice that it changes to a lighter color (this is pretty clear from the video). You will want to let it dry for a few seconds. The fourth step is to use the special wipe that comes in the package to wipe down the connection area of the grid. The wipe is connected to the inside of the packet, and this step is pretty clearly shown in the Permatex instructional video. You will want to let it dry for a few minutes. I believe the video said at least two minutes, but not more than 15. I believe the box says five minutes. I waited for five minutes. The fifth step is to knead the epoxy/glue packet. I did this during the five minutes that the chemical in the previous step dried. The sixth step is to cut the packet and put a bit of the conductive epoxy on the tab. The video says to put only one drop on the tab. However, because as I explained previously, my '97 Civic tab has two raised ends, I put a drop on each end of my tab. The seventh step is to place the tab on the connection area of the grid that was prepped, first with rubbing alcohol, and then with the chemical that was allowed to dry for five minutes. Make sure that the orientation of the tab is correct (i.e., point the connecting bit of the tab towards the harness) and carefully press the tab into place. I held the tab for about a minute in place while applying uniform pressure. I also used a hair dryer to heat up the epoxy because I read that that speeds up the drying process. I kept the hair dryer on it for a few minutes, just to be sure. If you have a voltmeter, you can make sure that the connection is good at this point. The eight step is to wait for 24 hours before hooking the wiring harness back up to the tab. Et voilà! It should work. It was so nice to be able to use the rear defrost this morning. I only gave four stars because Permatex should really provide better instructions.

Unfortunately they don’t sell this stuff in stores anymore due to all the PEOPLE WHO DONT WORK ON THEIR OWN CARS ANYMORE!!! But this was my fix to my rear windshield when I needed it. It did work perfectly but there was a learning curve with it in my situation. I had to buy it cuz my 3rd brake light was in the same circuit as my rear glass heater, thanks ford….

First of all, did this work? Yes. I think it’s actually worked quite well now that it’s bonded on there. For my repair I was replacing a broken tab and one that had just fallen off. I went ahead and ordered two new tabs on Amazon. The two new tabs fit just fine and they were very similar to my old tabs. That included four little dimples on the bottom side of the tabs. The missing piece of these instructions is that it does not tell you that if you have dimple feet or dimple indentions on the bottom of your tab then those have to be filed off flat otherwise this will not adhere. This looks like it is different than the original OEM epoxy. When I originally tried, it would not adhere. Even after following the instructions to the letter. Fortunately, I quickly was able to figure out that it needed to sit completely flat against the glass even though most of the tabs I have seen have a little dimple feet on the bottom. It dos say in passing in instructions about sitting flat but not all feet are flat. Take a metal file and file those down flat. It doesn’t take much just a few strokes, but make sure they’re flat. Once you do that then one to two drops of this after following the instructions seems to work just fine. I’ve got current and heat on my rear window now. So would I get it again? Yes but I wish they would tell you the instructions that if your tabs have dimple feet on the bottom, you need to file those down flat with a file first! Oh and you can probably adhere about a half dozen or more with one pack. A little goes a long way.

**Review: Permatex 21351 Electrically Conductive Rear Window Defogger Tab Adhesive** As an automotive enthusiast with a penchant for DIY repairs, I recently had the opportunity to test out Permatex's 21351 Electrically Conductive Rear Window Defogger Tab Adhesive. Let me tell you, this product exceeded my expectations in every way. First and foremost, the adhesive's conductivity is impressive. It forms a strong and reliable bond between the defogger tab and the rear window, ensuring optimal electrical connectivity. This means that once applied, I can trust that my rear window defogger will function flawlessly, providing clear visibility during inclement weather. Furthermore, I was impressed by the ease of application. The adhesive comes in a convenient tube with a precision applicator tip, allowing for precise and controlled dispensing. This made it easy to apply the adhesive exactly where needed, without any messy drips or spills. One of the standout features of this product is its durability. Once cured, the adhesive forms a strong and flexible bond that can withstand the rigors of everyday driving. Whether facing extreme temperatures, moisture, or vibrations, I have full confidence that the bond will remain intact, providing long-lasting performance. Additionally, I appreciated the versatility of this adhesive. While specifically designed for rear window defogger tab repair, I found that it could also be used for other electrical connections within the vehicle, such as repairing wiring harnesses or securing electrical components. In conclusion, Permatex's 21351 Electrically Conductive Rear Window Defogger Tab Adhesive is a game-changer for automotive enthusiasts and DIYers alike. With its impressive conductivity, ease of application, durability, and versatility, it's a must-have for anyone looking to tackle rear window defogger repairs with confidence. I can wholeheartedly recommend this product to anyone in need of a reliable and effective adhesive solution for their automotive electrical needs.