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🔧 Lock it down like a pro—because your ride deserves nothing less!
LOCTITE 271 Threadlocker is a high-strength, high-temperature anaerobic adhesive designed for heavy-duty automotive applications. It bonds all metals, including stainless steel and aluminum, providing a durable, vibration-resistant hold on large bolts and studs. Trusted by professionals and OEMs alike, it sets quickly in 10 minutes and fully cures in 24 hours, with heat-enabled removability for maintenance. Perfect for critical components like suspension fasteners and wheel studs, it ensures your vehicle stays secure under extreme conditions.









| ASIN | B0DF4NB8CY |
| Best Sellers Rank | #4,722 in Automotive ( See Top 100 in Automotive ) #21 in Thread Lock Sealers |
| Brand | Loctite |
| Brand Name | Loctite |
| Color | אדום (red) |
| Compatible Material | Metal |
| Container Type | Tube |
| Customer Reviews | 4.8 out of 5 stars 1,081 Reviews |
| Full Cure Time | 24 Hours |
| Item Form | Tube |
| Item Package Quantity | 1 |
| Item Type Name | automotive-thread-lock-sealers |
| Item Weight | 0.03 Pounds |
| Manufacturer | Loctite |
| Material | Methacrylate-based Resin |
| Material Type | Methacrylate-based Resin |
| Model | 37421 |
| Number of Pieces | 3 |
| Other Special Features of the Product | High-Strength, High-Temp, Removable with Heat |
| Part Number | 37421 |
| Special Feature | High-Strength, High-Temp, Removable with Heat |
| Specific Uses For Product | Automotive |
| Volume | 18 Milliliters |
| Water Resistance Level | Water Resistant |
S**S
Awesome product.
This works again as advertised, i used it to install my V6 muzzle brake on my KSG and it worked great, that thing has not flinched a millimeter from when i first set it and it's been there for months and hundreds of rounds mostly slugs or 00 buck shot out of it, i think i've shot about 6 shells of birdshot in my life and not with this shotgun. It just works for weapons applications just make sure what you're using it for you're not intending to remove regularly cuz i would assume it would suck for you then, use the blue loctite instead which i have for regular bolts and such.
M**E
Cannot beat for large hardware in critical application
Red Loctite is great for big, critical hardware applications. I usually default to blue Loctite for just about all the applications I find, but this time I was replacing wheel bearings and disc brake mounts on a 1 ton pickup, so that included both big hardware AND critical applications - really don't want those working loose over the next 50,000 miles!!! That would be a heck of a surprise. As usual, very easy to use in the tube - just apply a bit to the leading edge of the threads, run the bolt in, and torque it down. Of course, removing hardware with red Loctite is no joke but there's always heat if needed! That also means that the hold is fantastic and again, shouldn't work loose until it's intentionally persuaded with force and/or heat. So ease of removal is not easy at all - but that's the point! Applying out of the tube is very easy: just open the cap and cut off a tiny edge of the nozzle, then apply just a little bit (I've learned not to apply too much - it's just unneeded). Definitely not messy either, which is fantastic. When you apply it to threads, it really clings to the threads, allowing you time to get it in place and run down to torque. But it's also just runny enough to really work its way down into the threads. So overall, if you need to make sure a big piece of critical hardware doesn't move until you absolutely need it to, there's no better option that this red Loctite!
A**M
Works
Love the lock and unlock tip and work good as well
C**5
Caution
Use this on nuts and bolts you never want to remove only 👍
G**T
Screws won’t budge
Used this for a rifle stock that was held on by 2 screws that would always come loose when shooting. This stuff kept it locked down with no issues. Highly recommend
M**E
He loves it!
I am a retired A.S.E. master technician and have used thread lockers many times over many years. This time I was fixing a friends revolver barrel that had come loose and was rotating. Problem solved and my buddy is once again a straight shooter.
W**S
Loctite is reliable
Perhaps the third of Loctite's products I have used. Always reliable. Easy to use. I have not tried to undo this one red. the is my first use of a red Loctite
T**.
Great price
This is a deal. The parts store charges this much for a little one.
J**.
Buena compra
Rinde mucho y es un producto y marca que cumple lo que promete
N**S
Did the job perfectly
Replacing axle nuts on my ‘06 Corvette. Locked them on the shaft easily. As recommended, waited 24 hours for the thread lock to set properly.
C**N
Tès bon prix
Bon achat à un prix inférieur.
J**J
buena calidad
Llega a tiempo y Excelente producto
D**É
Efficacité
Filetage adapteur pour moteur
Trustpilot
2 months ago
5 days ago