Difference Wiki

Loctite 242 vs. Loctite 222: What's the Difference?

Edited by Aimie Carlson || By Harlon Moss || Published on February 3, 2024
Loctite 242 is a medium-strength threadlocker for general-purpose applications, while Loctite 222 is a low-strength threadlocker designed for small, delicate fasteners.

Key Differences

Loctite 242 is a medium-strength threadlocker, making it suitable for most metal fasteners. It secures bolts and screws effectively against vibration but can be removed with hand tools. Loctite 222, being low-strength, is ideal for smaller, more delicate screws and fasteners, where over-torquing is a concern.
Loctite 242 is recommended for fasteners up to 3/4 inches in diameter. It provides a reliable hold without permanent locking. Loctite 222, on the other hand, is best used for smaller fasteners, typically less than 1/4 inch in diameter, where ease of removal is important.
Bolts and screws treated with Loctite 242 can be disassembled with standard hand tools. It's designed for components that might need maintenance. Loctite 222, due to its lower strength, allows for even easier disassembly, making it suitable for delicate assemblies.
Both Loctite 242 and Loctite 222 offer good resistance to vibration, but the former is more robust in high-vibration environments. Loctite 222 is sufficient for low-stress applications where vibrations are minimal.
Loctite 242 works well with a variety of metals and is compatible with substrates commonly used in bolts and screws. Loctite 222 is also versatile but is particularly advantageous for delicate materials where excessive clamping force could cause damage.

Comparison Chart



Fastener Size

Up to 3/4 inches diameter
Best for < 1/4 inch diameter


Can be removed with hand tools
Easier disassembly

Vibration Resistance

Better suited for high-vibration
Suitable for low-vibration environments

Material Compatibility

Good for various metals
Ideal for delicate materials

Loctite 242 and Loctite 222 Definitions

Loctite 242

Vibration Resistant.
Loctite 242 is ideal for machinery exposed to vibrations.

Loctite 222

Suitable for Delicate Materials.
Loctite 222 is safe for softer materials.

Loctite 242

Medium-Strength Threadlocker.
Loctite 242 securely locks standard bolts.

Loctite 222

Easy Disassembly.
Loctite 222 allows for easy removal of fasteners.

Loctite 242

Metal Compatibility.
Loctite 242 works well on most metal fasteners.

Loctite 222

Delicate Fastener Application.
For fragile components, use Loctite 222.

Loctite 242

General-Purpose Use.
Use Loctite 242 for regular maintenance tasks.

Loctite 222

Low-Strength Threadlocker.
Loctite 222 is perfect for small screws.

Loctite 242

Hand Tool Removable.
Bolts with Loctite 242 can be loosened with hand tools.

Loctite 222

Low-Vibration Resistance.
Use Loctite 222 in low-stress, low-vibration environments.


When should I use Loctite 242?

For securing regular bolts and screws that might require occasional removal.

Can Loctite 242 withstand high temperatures?

It has good temperature resistance but check specific product specs for limits.

Is Loctite 222 suitable for heavy machinery?

No, it's better for delicate equipment with minimal vibration.

What is Loctite 242?

A medium-strength threadlocker for general-purpose applications.

Is Loctite 222 easy to remove?

Yes, it's designed for easy disassembly.

How long does Loctite 242 take to cure?

Full cure is typically within 24 hours, though it sets in a few minutes.

What defines Loctite 222?

A low-strength threadlocker, ideal for small and delicate fasteners.

What size fasteners is Loctite 222 best for?

It's best for small fasteners, less than 1/4 inch in diameter.

Can Loctite 242 be used underwater?

It's not ideal for underwater applications.

Can I disassemble parts with Loctite 222 without heating?

Yes, it can be disassembled with standard hand tools without heating.

Is Loctite 222 affected by humidity?

Its performance may degrade in high humidity; always check storage conditions.

How much Loctite 222 should I use?

A small drop is sufficient for small fasteners.

Does Loctite 242 work with all metals?

It's compatible with many metals, but avoid using it with certain reactive metals.

How should I store Loctite 242?

Store in a cool, dry place away from direct sunlight.

Can I use Loctite 242 on plastic?

Caution is advised as it may not be compatible with all plastics.

Does Loctite 222 prevent corrosion?

It can help to prevent rust and corrosion by sealing threads.

Can I use Loctite 222 on electrical connections?

It's not recommended for electrical connections due to its insulating properties.

How do I apply Loctite 242?

Apply it to the bolt threads before assembly.

Is Loctite 222 safe for automotive use?

Yes, it's suitable for automotive applications involving small screws and fasteners.

Is Loctite 242 resistant to solvents?

It has good solvent resistance, but specific resistance varies.
About Author
Written by
Harlon Moss
Harlon is a seasoned quality moderator and accomplished content writer for Difference Wiki. An alumnus of the prestigious University of California, he earned his degree in Computer Science. Leveraging his academic background, Harlon brings a meticulous and informed perspective to his work, ensuring content accuracy and excellence.
Edited by
Aimie Carlson
Aimie Carlson, holding a master's degree in English literature, is a fervent English language enthusiast. She lends her writing talents to Difference Wiki, a prominent website that specializes in comparisons, offering readers insightful analyses that both captivate and inform.

Trending Comparisons

Popular Comparisons

New Comparisons