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Loctite 242 vs. Loctite 222: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Published on February 3, 2024
Loctite 242 is a medium-strength threadlocker for standard bolts, while Loctite 222 is a low-strength version for small screws and delicate applications.
Loctite 242 vs. Loctite 222

Key Differences

Loctite 242 is a medium-strength, blue threadlocking adhesive designed for securing and sealing bolts, nuts, and threaded fasteners to prevent loosening from vibration. In contrast, Loctite 222, known for its purple color, is a low-strength threadlocker formulated specifically for small screws, threaded metals, and delicate applications where easy disassembly is necessary.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
The key difference in strength means Loctite 242 is ideal for larger, standard-size bolts where a reliable hold is needed, but disassembly with hand tools is still possible. Loctite 222, being less strong, is perfect for finer threads and smaller fasteners where excessive threadlocking strength could cause damage or make disassembly difficult.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
While both products serve to prevent loosening due to vibration or shock, Loctite 242 offers a more versatile range of applications in various industries, including automotive and heavy machinery. Loctite 222, with its lower strength, is more suited for electronics, precision instruments, and applications involving lightweight materials.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
Loctite 242 is recommended for fasteners up to 3/4 inches in diameter, providing a balance between strength and removability. Loctite 222, on the other hand, is best for fasteners under 1/4 inch in diameter, ensuring securement without compromising the integrity of smaller, more delicate components.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Comparison Chart

Strength

Medium-strength
Low-strength
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Shumaila Saeed
Feb 03, 2024
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Recommended Bolt Size

Up to 3/4 inches
Under 1/4 inches
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Feb 03, 2024

Color

Blue
Purple
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Feb 03, 2024

Ideal Use

Standard bolts and fasteners
Small screws, delicate applications
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Shumaila Saeed
Feb 03, 2024

Ease of Disassembly

Possible with hand tools
Easier, suitable for delicate parts
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Shumaila Saeed
Feb 03, 2024

Loctite 242 and Loctite 222 Definitions

Loctite 242

It's designed for fasteners up to 3/4 inches in diameter.
For these larger screws, I'll use Loctite 242.
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Shumaila Saeed
Jan 12, 2024
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Loctite 222

It's best for small screws under 1/4 inches.
I use Loctite 222 for tiny screws in electronic devices.
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Shumaila Saeed
Jan 12, 2024

Loctite 242

242 prevents loosening from shock and vibration.
To prevent loosening, I apply Loctite 242 on all critical fasteners.
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Shumaila Saeed
Jan 12, 2024

Loctite 222

222 is easy to disassemble, suitable for frequent adjustments.
I prefer Loctite 222 for components that need regular maintenance.
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Shumaila Saeed
Jan 12, 2024

Loctite 242

Loctite 242 is a medium-strength, blue threadlocker.
I secured the machine's bolts with Loctite 242 for vibration resistance.
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Shumaila Saeed
Jan 12, 2024

Loctite 222

Loctite 222 is a low-strength, purple threadlocker.
For these delicate instruments, Loctite 222 is ideal.
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Shumaila Saeed
Jan 12, 2024
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Loctite 242

Loctite 242 allows for disassembly with standard hand tools.
I can easily undo these bolts later since I used Loctite 242.
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Shumaila Saeed
Jan 12, 2024

Loctite 222

Loctite 222 ensures securement without damaging threads.
Loctite 222 holds well but doesn't strip the threads.
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Shumaila Saeed
Jan 12, 2024

Loctite 242

It's widely used in automotive and machinery applications.
Loctite 242 is my go-to for car engine bolts.
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Shumaila Saeed
Jan 12, 2024

Loctite 222

Ideal for precision instruments and electronics.
In my watch repair work, Loctite 222 is indispensable.
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Shumaila Saeed
Jan 12, 2024

Repeatedly Asked Queries

What is Loctite 242 used for?

Securing medium-sized bolts and fasteners.
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Shumaila Saeed
Feb 03, 2024

How strong is Loctite 242?

It's a medium-strength adhesive.
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Shumaila Saeed
Feb 03, 2024

What is Loctite 222 used for?

Locking small screws in delicate applications.
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Shumaila Saeed
Feb 03, 2024

Does Loctite 242 work on all metals?

It works on most metals but test on a small area first.
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Shumaila Saeed
Feb 03, 2024

How strong is Loctite 222?

It's a low-strength adhesive.
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Shumaila Saeed
Feb 03, 2024

Is Loctite 222 easy to remove?

Yes, it's designed for easy disassembly.
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Shumaila Saeed
Feb 03, 2024

How long does Loctite 222 take to cure?

Generally, it cures within 24 hours.
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Feb 03, 2024

Is Loctite 222 resistant to vibrations?

Yes, it's designed to resist vibrations.
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Shumaila Saeed
Feb 03, 2024

Can Loctite 242 be used on plastic?

It's not recommended for plastic as it may cause cracking.
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Shumaila Saeed
Feb 03, 2024

Is Loctite 222 suitable for heavy machinery?

No, it's better for smaller, delicate components.
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Shumaila Saeed
Feb 03, 2024

Can Loctite 222 be used on plastics?

Yes, but test for compatibility first.
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Shumaila Saeed
Feb 03, 2024

How do I remove Loctite 222?

Typically, it can be removed with standard tools.
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Shumaila Saeed
Feb 03, 2024

Can I use Loctite 242 for electrical connections?

It's not recommended for electrical connections.
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Shumaila Saeed
Feb 03, 2024

Can I remove parts secured with Loctite 242 easily?

Yes, with standard hand tools.
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Shumaila Saeed
Feb 03, 2024

Can I use Loctite 242 on a car engine?

Yes, it's suitable for automotive applications.
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Shumaila Saeed
Feb 03, 2024

Is Loctite 222 waterproof?

It's moisture resistant, but not entirely waterproof.
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Shumaila Saeed
Feb 03, 2024

Is Loctite 242 resistant to heat?

It withstands moderate temperatures.
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Shumaila Saeed
Feb 03, 2024

What's the shelf life of Loctite 222?

Usually around 2 years when stored properly.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

How long does Loctite 242 take to cure?

It typically cures in 24 hours.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

How do I apply Loctite 242?

Apply it to the bolt threads before assembly.
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Shumaila Saeed
Feb 03, 2024

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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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