What’s the difference between Loctite 262 and 272?
Loctite 272 threadlocker is stronger and performs better at higher temperatures than Loctite 262. It’s better to use Loctite 262 for smaller fasteners since it has medium strength and better chemical resistance. Fasteners that need high strength and heat resistance should use Loctite 272.
Loctite 262 vs 272: Specs & Uses
Here is the info:
My Hands-on Test: Loctite 262
✅Pros: Loctite 262
For applications where I anticipate needing to remove bolts later, or when securing grip nuts on my pistols, I rely on Loctite 243 blue. It provides a secure hold while still allowing for future removal if necessary. Similarly, I use the Purple 222MS threadlocker for grip screws
, sight set screws, and some of the Harley bolts that I frequently remove. The purple variant effectively withstands vibrations while remaining easy to break loose with a bit of torque.
Versatility
Loctite 262 stands out for its versatility. No matter what I’m working on, whether it’s a motorized bike kit or something I might need to disassemble in the future, this threadlocker has got me covered. Especially for permanent applications, the red formula provides an incredibly strong bond that can withstand even the toughest conditions. For semi-permanent applications like securing scope mounts or firearm rings, the blue Loctite 242 is a good choice.
Sideways Torque
Recently I bought some cabinet pulls with a unique T-shape. Whenever the door was opened, it exerted a significant sideways torque on the pulls. After applying a drop of Loctite 262 threadlocker to each screw, it worked! It’s all good now. Even with sideways torque, the threadlocker kept the screws in place.
M5 – 0.8 button head bolts with Red Loctite 262 Threadlocker.
Loctite threadlockers are also good for other stuff. For instance, I used Loctite 262 to secure the pinion on my Traxxas radio-controlled vehicle. The results were impressive after letting it cure for around 24 hours.
❌Cons: Loctite 262
Now, let’s address the elephant in the room: How do you get it to turn loose? You’ll need the hot torch if you use the red formula. It doesn’t come apart easily, which is exactly what you want in a permanent threadlocker. Blue formula is better if you need to disassemble components later, since it’s removable.
FAQ: Loctite 262
Q: Which threadlocker should I use for guns, such as scope mounts? Should I opt for Blue 242 or one of the red options? There are numerous choices available, excluding high-temperature variants.
A: If you intend to use threadlocker on a scope mount or rings, I recommend sticking with Blue 242. See my test here: Loctite 242 vs. 271 
. It is crucial to follow the manufacturer’s torque settings when setting up a scope. I would also suggest investing in a reliable torque wrench to ensure that you don’t overtighten the hardware.
Q: Can Loctite 262 be used in fuel systems, specifically with diesel or gasoline engines?
A: It t is designed to be applied to dry nuts and bolts free of solvents. Use your own judgment when considering its use in fuel systems.
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My Hands-on Test: Loctite 272
Although it’s not truly liquid, its semi-solid texture makes it easy to apply without dripping.
In spite of its thickness, I found it to be surprisingly easy to work with.
✅Pros: LOCTITE 272
The bottle had a generous fill level, which I liked. Despite not being completely full, it was more than half full. Not to mention that it has an extended shelf life – I’ve had mine for over a year, and it’s still going strong.
With a quick setting time of 10 minutes on steel, 5 minutes on brass, and 15 minutes on stainless steel, LOCTITE 272 ensures efficient and timely completion of projects. Its unique formulation prevents any adhesive migration, making it an excellent choice for scenarios where unwanted movement of the adhesive is a concern.
Shotgun’s Choke Tube
As for my shotgun’s choke tube, I tried Loctite 272 out too. I had been having trouble threading the tube due to recoil from shooting rifled slugs through my smoothbore barrel. But after firing 150 rounds with Loctite 272, the choke tube hasn’t moved at all. My 12-gauge Remington 870 with an improved cylinder tube and 2-3/4″ Remington Slugger “pumpkin” slugs performed flawlessly.
High-Temperature Situations
I’ve had a great experience with Loctite 272 when it comes to holding studs in high-temperature situations. I recently used it to secure a stud in my 
Model A accessory heater exhaust manifold, which tends to get pretty warm. I wanted to ensure that the stud wouldn’t pull out, and I can confidently say that the Loc-tite did its job. I’ve been driving the car multiple times since applying it, and the stud is holding up perfectly. If it didn’t, the heater cover would rattle like crazy, but that hasn’t been the case. So, if you’re in need of a product that can handle high temperatures, I highly recommend giving Loc-tite a try.
Hold Things Together Over Time
One of the reasons I find Loctite 272 to be highly valuable is its ability to hold things together over time. Recently, I had to fill some gaps on a yoke going into a transmission that had gotten scratched over the course of 40 years. I used an aluminum sleeve kit, but it wasn’t staying securely in place. That’s when I decided to give Loctite 272 a try.
I smeared it on the yoke and inserted the sleeve, hoping it would prevent oil from leaking past. Only time will tell if it truly works, but based on my experience with other Threadlocker products, I have a good feeling about this one. Additionally, I’ve used Loctite 272 on some exhaust studs to make sure they stay put, and so far, it has been successful.
❌Cons: LOCTITE 272
I also had a positive experience with the Loc-tite product while replacing the camshaft tensioner spacers on my 2006 Kawasaki Vulcan 1600. It was incredibly easy to use, but I must warn you that this stuff cures relatively quickly. Therefore, it’s important to use only the amount you need and wipe off any excess immediately. It’s also a good idea to wear gloves when working with this product. Overall, it worked wonderfully for me, and I was able to complete the task without any issues.
FAQ: LOCTITE 272
Q: What is the recommended drying time for LOCTITE 272?
A: According to the instructions, the parts should be fixed within 30 minutes and fully cured after 24 hours.
Q: I received a bottle of 272 (50 ml) that doesn’t indicate “high temperature” as expected. Should I be concerned? I require high temperature resistance.
A: LOCTITE 272 is certainly suitable for use in high-temperature environments. Just be prompt when assembling parts, as it sets quickly. If the parts are misaligned when fully set, you will need to use a torch to undo them, which can sometimes be inconvenient.
Q: Is LOCTITE 272 removable when necessary?
A: It can be removed, but it is not a simple task. The ease of removal depends on the size of the item and the number of threads that are joined together. LOCTITE 272 performs exceptionally well in high-temperature environments.
Q: Can I use LOCTITE 272 to attach a wooden handle to a ceramic mug that may be used in the microwave?
A: While I haven’t personally attempted this specific type of attachment, I don’t believe it would be effective. I would recommend using some form of epoxy for that purpose.
Q: Will LOCTITE 272 stick a magnet to a welding blanket?
A: No, it will not.
Q: If I apply LOCTITE 272 to brake bracket-to-steering knuckle bolts, will I be able to loosen those bolts with a large breaker bar without using heat?
A: Yes, you will be able to loosen those bolts without heat.
Q: Exhaust pipes on motorcycles can reach temperatures above 1,000 degrees F. Which type of LOCTITE should be used in this case?
A: LOCTITE 272 can withstand extremely high temperatures. I personally use it on my rifle barrel, which reaches temperatures up to 600 F, and it has not posed any issues so far. However, for temperatures exceeding 1,000 F, you may need to explore other brands. Nonetheless, I generally advise against using LOCTITE for fastening mufflers; it is better to use proper torque.
Q: I’m wondering if LOCTITE 272 is suitable for securing a screw inside an oven door that keeps coming loose. It seems like an excessive measure for an oven, though.
A: While it may be considered excessive, it would indeed work in that scenario. Just bear in mind that once the screw is secured with this product, removing it again will require exposure to extremely high heat. Personally, I have used it on the threads of a free float rifle barrel.
Q: Would LOCTITE 272 be appropriate for securing the two bolts of an AR-15 gas key to the bolt carrier group?
A: Yes, it would work for that purpose. However, if you plan on removing these bolts at any point, it will be quite challenging. This type of LOCTITE is intended for permanent fastening applications.
I’m Ronald Stevens, a Mechanical Engineer obsessed with adhesives, glue, and all things sticky! My passion began in childhood when I’d always be the one playing with glue during arts and crafts. And I’d spend hours researching and experimenting. Happy reading, and remember: stick with the best, and you’ll never be stuck in a mess!
Feel free to contact me and join our discussion:
Can gasoline have any impact on 272?
To my knowledge, the only factor that can have an effect on LOCTITE 272 is the intense heat generated by a torch.