Loctite 242 vs. 271: Loctite 271 is intended for applications involving extreme vibration or situations where a loose bolt or nut could be extremely dangerous. It requires a temperature of 475 degrees Fahrenheit to release, which is per design. But what about Loctite 242?
Which one should you use on your next project? In this article, we’ll compare Loctite 242 and 271 head-to-head on several factors:
- Bond strength
- Ideal applications
- Cure time
- Resistance to shock, vibration, and harsh chemicals
- Ease of application and cleanup
You’ll learn the pros and cons of each and get a recommendation on which threadlocker is the right fit for your next job.
Loctite 242 vs. 271: What’s The Difference?
The key difference between Loctite 242 vs. 271 is:
📝 My Hands-on Test of Loctite 242
✅Pros
let’s talk about the effectiveness of the Loctite Threadlocker in general. It’s clear that this product excels in its function, especially when it comes to securing metal components. The name “Loctite” is renowned for a reason, and I firmly believe that it’s not an area where you should compromise on quality. While opting for cheaper alternatives may seem tempting, the peace of mind and reliability offered by Loctite are worth the investment. Just remember to follow the instructions and use the threadlocker as directed for optimal results.
I’ve used Loctite Threadlocker for various applications, primarily in the automotive realm. From pellet gun bolts to rolling floor jack bolts, this product has consistently delivered outstanding performance. It effectively prevents bolts and nuts from vibrating loose, ensuring a secure fit. What’s even better is that it remains removable when needed. I can’t emphasize enough how much of a lifesaver this threadlocker has been in preventing unwanted loosening.
❌Cons
Tried to push a pin into the top to open it as I only wanted a very small amount of tightener for a small screw, but that was impossible without resorting to heating the pin. So after cutting the smallest part of the tube top, I had too large of an opening.
FAQ of Loctite Threadlocker Blue 242
Q: Should I apply Loctite Blue 242 to the doorknob set screw before or after screwing it in? Do I put a drop on top?
A: It’s best to apply this to the screw threads before screwing it in. Make sure to use a very small amount, and apply it before the screw is fully inserted. Remember, less is more in this case.
Q: What’s the proper way to open the sealed tube? Can I simply poke a hole at the top?
A: To open the sealed tube, I would recommend using a thumbtack, safety pin, or a similar object to gently poke a hole into the flat tip of the tube. This method allows for better control and ensures droplet-sized application.
Q: Can Loctite Blue 242 be used for securing glasses, particularly the screws that hold the lenses in place?
A: No, Loctite Blue 242 is not suitable for use on glasses. For small screws like the ones holding lenses in place, I recommend using Loctite 222 instead.
Q: I’m planning to join two 20′ pieces of pipe together for a weather station pole that will be exposed to outdoor conditions. Which Loctite product would be most suitable?
A: In your case, I would recommend using the Blue Loctite 242 (See loctite blue vs loctite red), which is designed for larger gaps like pipe threads. It has a thicker consistency. However, if you anticipate the need to disassemble the pipe in the future, I suggest using regular pipe dope paste. If the pipe is meant to stay permanently assembled, no additional product is necessary, but be cautious of potential rusting.
Q: Does Loctite Blue 242 harden? I applied it to a thread for testing, but after 24 hours, it was still in liquid form and could be easily removed with a paper towel.
A: Yes, Loctite Blue 242 does harden. Before using it, make sure to shake the bottle well. Apply a drop of the product to the fastener threads, ensuring you use a minimal amount. Tighten the fastener to prevent loosening, and wipe off any excess while it’s still wet. Remember to cap the tube tightly. If you need to reopen the tube in the future, you can use pliers and a pin or small nail. Loctite Blue 242 has proven effective for keeping fasteners secure while allowing for future removal if needed.
Q: Can I apply this to an already tightened bolt without removing it?
A: Loctite Blue 242 is intended for use during installation and not for already assembled or installed bolts. I would recommend removing the bolts and re-installing them with Loctite Blue 242 for optimal effectiveness.
Q: Will this work on stainless steel bolts?
A: Loctite Threadlocker Blue 242 is particularly suitable for applications involving less active substrates like stainless steel and plated surfaces, where disassembly may be required for servicing. Have a great day!
Q: What is the shelf life of the Blue 242? If I open it, use it once, and then store it, how long will it remain effective?
A: According to Loctite, the shelf life of Blue 242 is two years. However, many users have reported it lasting longer. I have personally used a tube that I opened four years ago, and it still appears to work well.
Q: Will Loctite Blue 242 work for securing a bolt in a power rear gate? I had to replace the entire motor because the bolt came out and stripped the threads.
A: No, Loctite Blue 242 will not work in that situation. I recommend using Red Loctite instead. Ensure that the bolt is clean and free of any oil residue before applying the Red Loctite. Allow it to dry for at least an hour, or longer if possible.
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Q: Is it safe to use this as a denture adhesive?
A: Yes, Loctite Blue 242 can be used as a denture adhesive. I have personally used it for ten years now, although I must say that it does affect the taste of corn.
📝 My Hands-on Test of Loctite 271
✅Pros
I rely on the Loctite threadlockers to secure leather straps with Chicago screws. It has significantly improved the longevity of our products. I have different variations of Loctite threadlockers to cater to specific usage scenarios. They allow us to maintain our manufacturing process with minimal changes, and they perform exactly as advertised.
I also use Loctite 271 when replacing the screws on my outboard water case. Given the significant vibrations experienced by Johnson outboards, I wanted a reliable solution to ensure the screws remained secure. The thread-locker worked perfectly, and I didn’t encounter any issues. I even had to remove one screw temporarily, and it came out without a problem.
Red Threadlocker 271 is a high-strength adhesive designed for heavy-duty applications. It provides a holding power of 3,000 psi on slip and press fit assemblies. It is particularly useful for locking studs and press fits securely. If you ever need to unscrew anything secured with the red threadlocker, make sure to use the blue version.
It always been reliable, including this red variant. It is easy to use, and once applied properly, the bonded surfaces will not come apart. I have used it on various parts, such as flywheel bolts and butterfly screws in intake manifolds, and they have never loosened after application.
I appreciate the strength of this threadlocker when properly applied. It ensures that screws on my scope mount blocks remain secure without any chance of them coming loose. While it is possible to remove the screws if needed, it requires considerable effort and sometimes even heat. This is exactly what I want for critical applications where I don’t want any chance of the mount screws coming loose.
❌Cons
While the product itself is good, the packaging could be improved. It should clearly indicate that it is a liquid, as I was expecting a gel-like consistency. I accidentally dispensed more than I intended, and once it sets, it becomes challenging to remove. A redesign of the packaging, including a warning about its liquid nature, would be beneficial.
FAQ of Loctite 271
Q: Is Loctite 271 suitable for installing a gun sight, or should I consider something else?
A: It might be too heavy-duty for the task. This particular product, Loctite 271, was designed for larger threads with a 3/8+ hold. Using it on smaller threads, such as a scope mount for a gun sight, could make it extremely difficult to remove in the future due to the limited application of heat and torque. I would recommend using Loctite Blue, which is specifically designed for smaller threads.
Q: Does this particular product require the use of a primer? The fourth image on Amazon seems to suggest so, but the instructions don’t mention it. I’m working with stainless steel and aluminum.
A: In my experience, I didn’t need to use a primer with Loctite 271. I used it on steel threads without even cleaning them. Once applied, the product hardened within minutes. Just to be safe, I waited 24 hours before using the assembled parts. It’s an excellent product that I’ve been using in the automobile repair industry for over 30 years.
Q: I have a problem with a locking nut on my sink faucet that keeps coming loose and causing the faucet to wobble. Would Loctite 271 be suitable for securing it?
A: Oh, no! I wouldn’t recommend using Loctite 271 for your faucet. It is intended for applications involving extreme vibration or situations where a loose bolt or nut could be extremely dangerous. For your faucet, the blue Loctite 242 should be sufficient. If you were to use the red Loctite, you would need significant heat and force to remove the nut in the future, which could cause damage if you need to replace the faucet.
Q: If Loctite 271 is opened and used, how long will it remain fresh and usable?
A: The shelf life of unopened Loctite 271 is two years from the date of manufacture. Once opened, the product remains stable due to its exposure to oxygen. It is packaged in a “breathable” plastic bottle, so there is no change in shelf life once it has been opened.
Q: Can I remove my lug nuts after using Loctite 271?
A: Loctite 271 is not as permanent as you might expect. I have successfully removed lug nuts with Loctite 271 applied, and I didn’t need to apply heat or excessive force. However, it does provide a strong bond between threaded metal parts.
Q: Would Loctite 271 be suitable for securing a muzzle brake on a rifle?
A: I would recommend using Loctite 271 before assembling the muzzle brake. It can provide additional security and stability.
Q: Can I use Loctite 271 for securing a Traxxas Slash 4×4 high pinion gear?
A: I have been using Loctite 271 for over 10 years on various applications, and I believe it would work well for you. I have used it on bolts to attach ring gears, and I think it would be very effective in your case. Thank you for your question.
Q: Is Loctite 271 effective for securing screws on the inside of a self-cleaning oven door that keep coming loose?
A: I would advise against using Loctite 271 due to the high heat generated during the self-cleaning process. Loctite 271 requires a temperature of 475 degrees Fahrenheit to release, which is per design. The oven can reach temperatures higher than that during the preheat or auto clean cycles. As long as the oven never exceeds 475 degrees, the product should hold tight. Personally, I love using this stuff.
Q: Can I use Loctite 271 on wood cabinets?
A: I doubt that Loctite 271 would work on wood or porous materials. Instead, I would recommend using wood glue (See ca glue for wood). Apply the glue and screw in the bolt once it has almost hardened.
Q: Will Loctite 271 work for spark plug inserts? I need something that can withstand high heat but don’t want to spend $50 on the 2640.
A: Based on my experience, Loctite 271 requires heating bonded bolts up to 482 degrees Fahrenheit to separate them. While I’m unsure of the average temperature for spark plugs in an engine, I used Loctite 271 in a cold application.
Q: Has anyone used Loctite 271 on their guns? I need something to secure the barrel to my upper receiver and I’m wondering if this or the blue variant is sufficient.
A: I used the bluevariant of Loctite for securing scope mounts on firearms, and it worked well. However, for securing the barrel to the upper receiver, I recommend consulting with a gunsmith or reaching out to the manufacturer of your firearm for their recommendations on the appropriate threadlocker to use. They will have specific knowledge about the materials and specifications of your firearm and can provide the best guidance for your particular application.
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!
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