Loctite Threadlocker - Blue 242 - 6 ml
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Product Information
Full details
This Loctite Blue 242 Threadlocker is designed for users working with metal fasteners on small machinery like motors, mowers, and power equipment. Its key benefit is preventing loosening caused by vibration, which eliminates the need for costly lock nuts and washers while also protecting against rust and corrosion. A caveat is its medium strength, making it best suited for threads between 6mm and 19mm. This formula sets quickly, offering a reliable and removable bond for various mechanical applications.
All features
| Colour | Blue |
|---|---|
| Model Part Number | 209728 |
| Brand | Loctite |
Extended Product Information
FAQs
What is the primary use for Loctite Blue 242?
It's primarily used to lock and seal metal fasteners that are subject to vibration, preventing them from loosening and protecting against rust and corrosion.
What is the strength of this threadlocker?
Loctite Blue 242 is a medium-strength threadlocker, designed for good holding power that is still removable with hand tools.
What fastener sizes is this product suitable for?
It is recommended for thread sizes ranging from 6mm to 19mm (approximately 1/4" to 3/4").
How long does it take to set and cure?
It sets in approximately 10 minutes and reaches a full cure in 24 hours.
Can I use this on plastic parts?
No, Loctite Blue 242 is designed for metal threads only and is not recommended for use on plastics.
How do I remove a fastener treated with this threadlocker?
Most fasteners can be removed with standard hand tools. For tighter bonds, applying heat to the assembly can help soften the cured adhesive.
What is the shelf life of Loctite Blue 242?
When stored properly in a cool, dry place with the cap sealed, the shelf life is typically around 2 years.
Troubleshooting
Fastener is still loose after curing.
Ensure surfaces were properly cleaned and degreased before application. Reapply threadlocker after thorough cleaning.
Product is difficult to apply.
Check if the nozzle is clogged. If the product has thickened significantly, it may be old and should be replaced.
Fastener is too difficult to remove.
Apply heat to the fastener area (e.g., with a heat gun) to soften the cured adhesive, then attempt removal with hand tools.
Pros and Cons
Pros
- Prevents vibration-induced loosening of fasteners.
- Protects against rust and corrosion.
- Removable with standard hand tools.
- Fast setting time speeds up assembly.
- Reduces inventory by replacing lock nuts and washers.
Cons
- Medium strength is not suitable for very high-stress applications.
- Requires proper surface preparation for optimal adhesion.
- Cure time of 24 hours for full strength may be too long for some urgent repairs.
Setup, Compatibility & Care
Setup:
- Ensure all threaded parts (nuts, bolts, screws) are clean and dry. Remove any grease, oil, or existing threadlocker.
- Apply 1-2 drops of Loctite Blue 242 directly onto the male threads.
- Assemble the fastener and tighten to the recommended torque.
- Allow the product to set for at least 10 minutes before moving the assembly. Full cure is achieved in 24 hours.
Compatibility:
- Suitable for all metal threaded fasteners, including steel, aluminum, and brass.
- Recommended for thread sizes from 6mm to 19mm (1/4" to 3/4").
- Not recommended for use on plastics or rubber.
Care & Storage:
- Store in a cool, dry place away from direct sunlight.
- Keep the cap tightly sealed when not in use.
- Shelf life is typically 2 years from the date of manufacture when stored properly.