LOCTITE 271 Vs 272 – Which Lube is the Best for Your Threadlocker?

Loctite 271 vs 272

When it comes to the world of hardware tools, a threadlocker is a great partner you need to have. It gives you the ease of adding finish to any fittings or nuts. Those in the automobile servicing industry would tell you how important this item is. Of all the plenty of threadlocker brands available in the market, Loctite is an outstanding one. In fact, it has, for a long, continued to provide a high-quality formula that fascinates its users.

Its popular and best-selling threadlockers include the Loctite 271 and 272 models. However, most of us get confused whenever we want to buy these products on the market. Tons of questions and concerns, which are better than the others, have continued to shake the world. If you intend to get factual and reliable answers, this article has got you covered.

What do we mean by a threadlocker?

It is important to get to understand what the threadlocker is, right? This is a convenient tool that helps to cover possible spaces around threads of any bolts or nuts. In other words, it comes as glue with uniform thinness. Besides that, it often encompasses single components.

LOCTITE 271 vs 272

Even though Loctite 271 and 272 come from a similar maker, they tend to have differences. Both features they have and performance. Additionally, purpose, fastener size, fixture time, and optimum heat make them quite different. Now, how do they differ?

Fastener size

The fastener size comes as the first mode of comparison. Different kinds of threadlockers need different fasteners. But why is this so? It’s because the strength and viscosity of a threadlocker rely on the size of the fastener in use. Therefore, the stronger adhesive works pretty well with a fastener of a large size.

Loctite 271 is an excellent choice for any fastener with sizes ranging from 3/8 to 1-inches. This is to say, its viscosity is quite low as compared to threadlockers with normal high strength. As a result, the Loctite 271 will give you an easy time removing it.

On the other hand, Loctite 272 features a higher viscosity. Thus, it requires a faster size ranging from 3/8 to 1.5-inches. This makes it pretty nice, like any high-strength threadlockers. In most cases, threadlockers in the Loctite group give a larger fastener size of 1-inch. Thus, the extra 0.5-inch makes it super impressive as a high-strength threadlocker.

Above all, varied fastener sizes are made to suit different kinds of work. Hence, both Loctite 271 and 272 do a good job.

Highest heat stability

Loctite 272 comes as a pro when it comes to heat stability. It has an optimum heat stability of up to 4500 F that no other threadlocker has. Additionally, it comes as the best alternative for the Loctite 2620. This series often has the highest heat stability of 6500 F but, it is quite rare to find on the market. So, the Loctite 272 threadlocker would be the best choice if you need one with the highest heat stability.

As for Loctite 271, it features less optimum heat stability as compared to Loctite 272. Still, it can withstand the heat of up to 3000 F at its best. However, it gets inactive when the heat is above its greatest temperature. Hence, it tends to be not a great option if you intend to use it in sites with high temperatures. The good thing with its lower heat tolerance is that it helps it to remove quite easily without any strain.

Fixture time

With a much lower viscosity and small fastener size, Loctite 271 happens to have less fixture time. In other words, it gets settled within only 10 to 20 minutes. Thus, you won’t wait for much longer once you tune the bolts and screws on your automobile. Yet, Loctite 272 has a much longer fixture time ranging from 40 minutes to a full hour to settle fully.

Application purpose

Each adhesive lube can perform a specific task to perfection. Loctite 271 is the best choice for press fits and fitting shock absorber mounts. Besides that, it helps in the installation of wheel studs and others.

Loctite 272, on the other side, is ideal for handling several functions. For instance, it helps in tightening crankshaft bolts, shock bolts, and ring gears. To add to that, it works well with shock bolts and idler bearings, plus many more. Above all, consider choosing a Loctite threadlocker based on the purposes it gives. This means that don’t always dwell only on the features and specifications it has.

How to remove Loctite 271 and 272

Removing these two high-strength threadlockers is quite hard. Firstly, it would help if you understand the type of threadlocker you applied to the bolts or nuts. And, this is the part where heat temperature takes charge. You should know how much heat the threadlocker you used to require for it to get removed.

After that, apply sweat or heat to the place where you intend to remove the threadlocker. Interpolating steam into the joints usually helps make the gum weak. As a result, it lets the fastener loose with ease, and you will have it done right!

Loctite 271 or 272- Winner

Loctite 271 vs. 272 are both high-strength thread lockers on the market. Besides that, they all cure in full after 24 hours of application. And most importantly, they are the best choice for heavy-duty automotive operations.

Other than that, their differences and functionality vary. When it comes to heat stability and the supported size of the fasteners, the Loctite 272 is a big deal. This means that it comes as the most heavy-duty adhesive on the market.


With our Loctite 271 vs 272 lubes comparison, you understand their vital differences. Hence, you can compare and select the best lube for your thread locker. Most importantly, consider your desires and comfort. You can have confidence in them as they have a high-quality formula. Plus, they give you every reason to smile while using them. Have a happy gearing moment!

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