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Loctite 37438 21351 Rear Window Defogger Tab Adhesive is a low-viscosity, water-resistant synthetic adhesive designed to electrically bond defogger tabs to rear window grids. This easy-to-use kit includes adhesive, an applicator, and instructions, enabling quick, cost-effective repairs that restore defogger functionality without professional tools.





| Customer Reviews | 3.9 out of 5 stars 605 Reviews |
C**E
Well worth the money
My rear defrost stopped working. Took it to a shop and the mechanic said gotta replace the rear window. I found this and figured worth a try. Easy to apply and my rear defrost works like new.
A**N
Very easy to apply
Very easy to apply
E**E
NOT WORTH IT - DOESN'T LAST OR WORK
I tried this kit twice....twice failed. Looks easy, installs easy but just doesn't bond well ... even after sanding and wiping surfaces with alcohol. Flattened tab and sanded it too...no success. I went for the $50 two part 80% silver epoxy that works well. I also read where a soldering iron can do the trick too, but will wait for the epoxy to fail before I try that one.
D**L
Good repair
1 year later, Zero issues. Fixed it right the first time.
C**.
Product worked almost as stated.
Needed both rear window defroster tabs put back in place. First used PermaTex. Even after following directions to knead, it was runny and had to be taped into place for 24 hrs to set. It did set up, seems to be holding fine. Not being pleased with the Permatex product, decided to try LocTite which I had to order. Again followed directions, kneading it until correct consistency. Much thicker and applied well. But again it did not adhere within 5 mins as stated on pkg. So it was also taped for 24 hours. It set up a bit faster. Both tabs appear to be staying in place, haven't had to use defroster as yet. Either product will re-set defroster tabs but take your time, expect to tape them into place for at least 24 hours. It will save an expensive trip to mechanic.
Y**E
Fantastic way to reattach and connect defrost wire.
Reattached wire after the kids pulled it off with this. Our defroster works again. Bonus used blue tape to form a line and used to bridge the gap left by scratch on defrost lines worked like a charm. Still working after 2 seasons.
B**N
Soldering will work better
Read all the reviews and followed the directions to a T, even as everyone else stated what to do. And it still didnt work.
D**.
Better than some other products
Worked well on the 1st try. Be sure to follow package directions exactly.
F**C
Je recommande le produit
Fonctionne très bien pour une réparation du dégivreur dans la vitre arrière d’un véhicule. J’ai collé le fil à la vitre et c’a tient depuis déjà 1ans.
A**N
منتج فعال من لوكتايت بالرغم من غلاء السعر
اتبعت التعليمات تماما .. نجحت التجربة وتم الصاق القطعة المعدنية مرة اخرى على الزجاج مع ملاحظة اني قمت بازالة اللحام المتبقي و صنفرته ليكون سطح ناعم نوعا ما قبل تركيب القطعة المعدنية... الان مزيل الضباب يعمل والقطعة ملتصقة بشكل ممتاز منذ شهر تقريبا. عيبه الوحيد هو ارتفاع السعر النسبي لاستخدام واحد!!
K**Y
Didn't work
Purchased on advice of my window repair man. Followed directions closely and allowing drying time. Would not cure/tack and solidify to adhere to rear window.
K**1
DIY
Expensive, but if you drive in winter conditions without defrosting your windows, well you are a danger on the roads. Just my opinion as a professional driver.
T**T
Delivray
Very good
Trustpilot
3 days ago
2 weeks ago