Loctite 271 vs 272: A Detailed Comparison of Two Threadlocker

Loctite 271 vs 272 comparison is necessary to highlight their differences, as both are thread lockers that are used in maintaining vehicles. Both thread lockers have unique features, and we will compare them to help you decide the best adhesive according to your needs.

Threadlocker Comparisons Loctite 271 vs 272

Continue reading to find out more about the differences between the two thread lockers, and choose the right one for your vehicle.

Features Loctite 271 Loctite 272
Fastening Size 1inch  1 and 1.5 inches
Setting and Curing Time 15 to 20 minutes 50 to 60 minutes
Temperature Range 300°F 450°F


What Are the Known Differences Between Loctite 271 and Loctite 272?

The main difference between Loctite 271 and 272 is that Loctite 271 is purple and it’s applied mainly in assembling threaded fittings, while Loctite 272 is a clear Loctite that is used to threads of metallic fasteners. 

Regarding heat stability, it’s worth noting that all Loctite threadlockers are designed to be used in environments with temperatures not more than 450°F. Loctite 272 offers more thermal stability at 450°F, while Loctite 271 temperature range is at 300°F. 

The fixture time is another area where both threadlockers also vary. Loctite 271 offers faster bonding and curing times of 15 to 20 minutes, while Loctite 272 offers bonding and curing times of 50 to 60 minutes. 

Loctite 271 Characteristics and Specifications

Loctite 271 is the preferred threadlocker for heavy-duty applications. It is designed to provide a lock and seal and protect the fasteners used in high-vibration environments like industrial and automotive machinery manufacturing. The Loctite formula is made of a thickening agent, which allows it to maximize stringency after curing/ This also enables the Loctite 271 to be applied in worn and looser threads, unlike the Loctite 272. 

Characteristics and Features of Loctite 271

A key thing to note about the Loctite 271 is that it only works in the absence of air, which makes it a suitable option for use on permanent surfaces. 

– Benefits of Loctite 271

The Loctite 271 threadlocker offers a range of benefits, including the following:

  • It comes in two types, which are Loctite 271 (blue Loctite) and Loctite 271 (red Loctite). The Loctite 271 blue offers more strength than the Loctite 271 red, meaning you can choose according to the situation or material that needs it. 
  • The shelf life of Loctite 271 is two years. Therefore, you can use it eight times before the expiry date. 
  • Application of the Loctite 271 is easy, and this is because it offers a mechanism for application over threaded connections and areas that are to be bonded together. 
  • Loctite 271 poses no harm to electronic equipment. Therefore, you can use it on different devices without fear of shorting out the circuit or causing rust. 

While these are the benefits of the Loctite 271, a key thing to always remember is that it’s not as firm as super glue and epoxy glue. 

Loctite 272 Characteristics and Specifications

Loctite 272 and 271 belong to the same series, but they are not entirely the same thing. It is a heavy-duty, high-performance adhesive designed for high strength and high temperature applications. This thread locker is mostly used to secure sprockets, bolts, shock absorbers, crankshafts, and other car parts. A common thing with all these parts is that they are subjected to high stress and vibrations. In some cases, due to these cruel conditions, you might have a crankshaft seal leak!

Attributes and Factors of Loctite 272

The thread locker offers excellent mechanical strength, and it can be applied to threaded fastenings that can be disassembled using conventional tools and high temperatures. Another interesting thing about the thread locker is that it locks threads easily, thereby preventing the loosening of bolts, nuts, and screws and preventing rusting. 

Loctite 272 is designed for use on thread fastenings between one and 1.5 inches in diameter. Also, it only takes 10 minutes to set and 60 minutes to harden. 

– Benefits of Loctite 272

The Loctite 272 thread locker offers a range of benefits, including the following:

  • Loctite 272 does not have any offensive odor
  • It doesn’t leave any stain on surfaces it is used on. 
  • The Loctite 272 thread lock is designed to prevent the loosening of fittings or bolts and to provide a perfect seal
  • It does not leave residues on external surfaces. 

A key thing to note about Loctite 272 is that it can be messy, especially when used for smaller sizes. Also, it’s not always easy to find in Loctite 272 stores. 

Frequently Asked Questions

1. What Are the Different Loctite Threadlocker Colors?

Locktite threadlockers come in different adhesion strengths, of which colors and numbers are used to identify the strength thread. The different colors are red, green, blue, and purple Loctite threadlocker. 

The common versions of the red Loctite threadlocker are Loctite 271, Loctite 272, Loctite 262, and Loctite 268. The standard versions of the green Loctite threadlocker are Loctite 290 and Loctite 270. Loctite 248, Loctite 243, and Loctite 242 are the standard versions of the blue Loctite threadlocker, and Loctite 222 is the common version of the purple Loctite threadlocker. Other common versions include Loctite 266, Loctite 263, and Loctite 277. 

2. Is Loctite 262 a Loctite 271 equivalent?

When comparing Loctite 271 vs 262, Loctite 262 is not a complete equivalent of Loctite 271. However, the Loctite 262 is a general-purpose and medium to high strength threadlocker. Loctite 262 comprises a thixotropic methacrylate-based adhesive that fluoresces when placed under UV light. 

3. Can I Refrigerate Loctite?

The storage conditions for Loctite are a major concern for many, with people always asking if they can refrigerate it. Fortunately, the storage guidelines are clearly stated on the packing of Loctite products. Loctite thread lockers should always be kept in an upright position and at temperatures between 46°F and 69°F. Keeping the Loctite in a refrigerator or cold conditions can alter the performance and properties of the product. 

4. Are Loctite 272 or Other Variations Removable? 

Another concern is whether Loctite 272 is removable or not. You can remove Loctite 272 from threads on bolts and screws. All you need is to heat the adhesive at 500°F. At this temperature, the threadlocker will break, and once this happens, you can remove the fastenings using a conventional hand tool. 

5. Can I Use Loctite 271 on Plastic?

While Loctite 271 is designed for application on a range of surfaces, it’s worth noting that you cannot use it on plastic, especially thermoplastics. This is because the threadlocker can eat into the plastic, and cause it to become brittle, which is the opposite of the result you want from the adhesive. The ideal surfaces to use Loctite 271 on include bolts, nuts, steel threads, brass, metal, and other similar surfaces. 


Loctite 271 and Loctite 272 are heavy-duty adhesives that are applied on bolts, screws, and nuts in different places, including vehicles. The two-thread lockers are designed to lock fastenings and keep everything in place, especially when subjected to high stress and vibrations. With everything above, we have highlighted the differences between the two threadlockers and their unique benefits. 

From the comparison above, Loctite 272 is a more versatile thread locker than Loctite 271, which can withstand higher temperatures. Loctite 272 also offers a wider range of applications and can be used on different screw sizes, unlike Loctite 271. However, it’s worth noting that both Loctite 271 and 272 are great adhesives, and if you want to secure your fastening in place, you can use either of the two and get the desired results. 

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