

🔧 Lock it down, loosen up later — the smart fix for every pro.
Loctite Threadlocker Blue 242 is a medium-strength adhesive designed to lock and seal metal fasteners sized 6-19mm, preventing loosening caused by vibration. It sets quickly in 10 minutes and fully cures in 24 hours, offering robust protection against rust and corrosion while remaining removable with hand tools. Ideal for small motors, mowers, and power equipment, it eliminates the need for costly lock nuts and washers, making it a must-have for professionals seeking reliable, maintenance-friendly fastening solutions.






| ASIN | B000I1RSNS |
| Best Sellers Rank | #27 in Automotive ( See Top 100 in Automotive ) #1 in Thread Lock Sealers |
| Brand Name | Loctite |
| Color | Blue |
| Compatible Material | Metal |
| Container Type | Tube |
| Customer Reviews | 4.8 4.8 out of 5 stars (41,956) |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00079340242005 |
| Included Components | Loctite Heavy Duty Threadlocker, 0.2 oz, Blue 242, Single |
| Item Form | Liquid |
| Item Package Quantity | 1 |
| Item Type Name | Blue 242 |
| Item Weight | 5 Grams |
| Manufacturer | Henkel Corporation |
| Material Type | Dimethylacrylate ester |
| Model | Henkel / osi -tanch-it- |
| Other Special Features of the Product | Strong |
| Specific Uses For Product | Threadlocker |
| Tensile Strength | 110 Pounds Per Inch |
| UPC | 079340242005 |
| Unit Count | 6 Milliliters |
| Viscosity | Medium |
| Volume | 6 Milliliters |
| Warranty Description | Warranty |
| Water Resistance Level | Water Resistant |
A**R
Works as it should. Excellent product
What else can be said about blue loctite. Use sparingly. A little can go a long way. Easy to use. Great value. Holds screws in place as it should
C**N
Handy bolt stabilizer for daily use
I've found the Loctite Blue 242 to be pretty handy when working on bicycles or fixing loose bolts. it keeps things in place without making it impossible to remove later. the medium strength seems just right for most tasks. the 6 ml size is convenient and lasts through several projects. overall, it does what I need without any fuss.
S**L
Does Exactly What It’s Supposed to Do
It’s blue Loctite 242. It works as advertised. Keeps fasteners from backing out due to vibration but still allows removal with normal hand tools. I’ve used it on vehicle hardware and other projects where I don’t want bolts walking loose over time. Apply it properly, let it cure, and it does its job. No drama. If you’re working on anything that sees vibration (automotive, motorcycles, equipment), this is a must-have in the toolbox.
B**G
Great product
I found it work very well. I highly recommend this product
S**N
Fixed my daughters chair where the bolt kept coming loose
Loctite Blue 242 is basically the secret sauce for anyone tired of screws slowly working themselves loose and falling out like they’ve given up on life. This stuff is the perfect middle ground: strong enough to keep things tight, but not so strong that you need a blowtorch to undo your mistakes later. I picked it up because my daughter’s desk chair kept losing its bolts. Every few days she’d sit down and the whole thing would wobble like it was auditioning for a comedy sketch. Tighten, loosen, repeat — super annoying. One tiny dab of Blue 242 on each bolt and suddenly the chair is as solid as if it came out of the box yesterday. No more surprise acrobatics. Why I like it: It just works. Simple, reliable, and zero drama. Removable without a fight. Hand tools are enough — no heat, no swearing. A little goes a long way. One tube feels like it’ll survive the apocalypse. Great for anything that vibrates loose. Perfect for chairs, bikes, small engines, you name it.
E**S
Best stuff to keep your threaded parts together! Can be removed with some effort, not by accident!
I have used this for more than 40 years. Always works. Easy to apply (More is not better). A slim stripe along the threads will do the best and will permit you to break the seal, with some effort. Whatever threads you "locK" will not unthread due to vibration or stress but can be unlocked, if needed. Especially effective on loose or worn threads. A little bit goes a long way. I usually apply it to the threads sparingly for best effect. If you want the threads to permanently NEVER come loose, use the Red. Have always had a tube of this around for the last 40 years. No need to overtorque (tighten) and risk stripping threads or breaking a bolt.
R**.
Great for mototcycle bolts
Works great on motorcycle bolts, did the job and everything has stayed put.
L**S
Locitite Threadlocker
Locitite Threadlocker... was exactly what my hubby needed... great stuff... easy to use... great value for the money
A**Y
Very nice product.it takes 24 hours to fully curate and get hardened.quality is good as per expectations.
G**H
great
L**S
Shake before use.
O**T
Colle correspondant exactement au descriptif. Elle n 'a pas coulé autour si on prend soin de mettre juste ce qu'il faut en tenant compte que cela peut déborder en appuyant pour fixer.
1**N
I am highly satisfied with this product; it is an excellent item to have readily available. I will undoubtedly repurchase it in the future. Thank you, seller.
Trustpilot
3 weeks ago
2 weeks ago