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Permatex 81840 is a professional-grade, 2-part adhesive kit designed specifically for securely mounting rearview mirrors to windshields. Featuring a medical-grade activator towelette and OEM-strength cyanoacrylate adhesive, it delivers precise, mess-free application and a durable bond to glass and metal surfaces. With a 24-hour full cure time and 5-year spare part availability, this compact kit ensures reliable, long-lasting performance trusted by professionals.
Brand | Permatex |
Specific Uses For Product | Repair |
Material | Cyanoacrylate |
Compatible Material | Glass, Metal |
Item Form | 2 part kit |
Special Feature | 2-part adhesive and activator towelette |
Color | White |
Item Package Quantity | 1 |
Package Information | Vial, Towelette |
Item Volume | 0.03 Fluid Ounces |
Viscosity | Moderate |
Full Cure Time | 24 Hours |
Water Resistance Level | Not Water Resistant |
EU Spare Part Availability Duration | 5 Years |
UPC | 686226818409 |
Global Trade Identification Number | 00686226818409 |
Manufacturer | Permatex |
Model | ITW Permatex - 81840 |
Item Weight | 0.48 ounces |
Product Dimensions | 0.44 x 3.81 x 6.5 inches |
Country of Origin | China |
Item model number | 81840 |
Batteries | 1 Unknown batteries required. |
Is Discontinued By Manufacturer | No |
Manufacturer Part Number | 81840 |
OEM Part Number | 81840 |
Special Features | 2-part adhesive and activator towelette |
H**
Item is simple to use and works well.
Easy to use !
B**R
Getting the glue out
Came within two days. Read the directions, scraped the old glue off the windshield with a razor. Circled the area outside the glass then applied the cleaner to the inside and the piece that glues to the glass. Opened the glue but the glue would not come out easily. So I kept dabbing the cap back on then putting a small amount onto the metal until it equaled a drop. Stuck it to the glass and it worked. Then I took the glue and squeezed it hard and a nice drop came out. So the only advice I could give is squeeze the tube hard enough to get the glue out.I then waited at least an hour and reinstalled the mirror. It seems to work and would recommend/purchase again.Amazon stands behind everything they offer and if anything went wrong I sure they would help. If it came opened or something was wrong with the glue dispenser, I think Amazon would send another.Some people just like to complain about anything. The product worked as described and at a great price therefore a rating of at least a 4 is deserved. I give it a five.
O**R
Does NOT WORK!! Can Crack Windshield due to chemical HEAT!!
I bought this Loctite Rear View Mirror specific glue and it FAILED in 5 days. Mirror fell off. It was not my first Rodeo, so everything was done correctly. Bond was just no good in Florida Heat. To add injury to FAILURE...just a day before it fell off I noticed a 1 inch crack going left and right from center of the Metal tab on windshield. (It's grown to 3 inches but seems to have stopped now. Can't be felt on either side of windshield with fingernail or Razor Blade, so it's not to the exterior.....YET.) I used just ONE DROP in center and pressed it up to the glass and held it in place for proper amount of time. NO crack seen the next day when I put the mirror on. The "Activator" reaction with the glue must have had some serious heat that I didn't notice on my Thumb while holding it.I tried the Loctite cheaper Glass Glue as well since it is rated to 176F and I've measured temps of over 140F on my Truck windshield. It failed within hours of mounting mirror after letting tab cure for 48 hours.I'm trying the Loctite 5 Minute Epoxy now. It's only rated to 120F so I'm not hopeful...but it's still on after two days now. LOLIf this fails....I will use PERMATEX 5 Minute Epoxy that I have used on my Golf Clubs for Decades. I've NEVER had a bond fail on those clubs. Need the Heat Gun to change out shafts.P.S. I saw Ole' Scotty Kilmer using this stuff on YouTube and poo pooing people who say it fails...Pfftt...rofl :~)
S**N
WORKS WELL
I was nervous about this adequately holding onto the glass but it holds quite well. Worth every penny.
D**R
Activator and glue to attach the mirror once. So do it right, hopefully.
Follow the directions to the letter! I had a previous Permatex product that included everything you need - the activator, glue, alcohol cleaning wipe, and sandpaper - to sand the windshield - important. My previous use of this product lasted about 2 years, and the instructions w/ this kit now noted that the glueing could fail if done in a hot car. So, I did the gluing this time, on a cool morning, and waited a full 24 hours before mounting the mirror onto the METAL button. I believe this product also said it's for METAL buttons, and not plastic ones - which I've never come across. I think glueing a button onto the sloping glass must be one of the more difficult surfaces to attach to. They give you enough glue for multiple attempts, but not enough activator for several tries, as the activator is in a pouch you tear open, and it dries, not a little bottle, like the glue.
J**D
Worked great
Used on my wife's rear view mirror when it decided to stop being mounted to the windshield thanks to the Texas summers. Durability seems good but it seems like a little steep pricing for a one time use amount. Instructions were straightforward easy to use. Dried quickly with no install mess but I still did not mount the mirror right away I let the mount cure overnight just as an extra precaution. Has held up great and I will update if there's any changes in results later.
D**Y
Grip Good
Grip
M**
Mine was opened and a mess
Mine was exploded inside the sealed container, maybe they weren't kind tonit during shipping but it was a mess when I opened it and had to pull the rear cap off to squeeze a drop of adhesive out of it to glue my mirror on. Luckily I purchased it for one application anyways and it worked great for that. Be sure to read instructions too as you do not want to be touching the prep pad or anything. Prep pad is to ramain inside packaging and you hold onto the packaging. Mine had the adhesive all over it so I wore nitrile gloves.
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