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🔩 Lock it down cleanly, fast, and confidently with Loctite’s game-changing stick!
Loctite 37643 Blue Medium Strength Threadlocker Stick is a 9g wax-like adhesive designed for medium-strength thread locking on metals including stainless steel and aluminum. Its stick applicator ensures mess-free, precise application, especially in overhead or tight spaces. It cures quickly—initial set in 10 minutes and full strength in 24 hours—offering reliable, removable bonding for bolts sized 6mm to 19mm. Trusted by professionals for automotive and maintenance tasks, it resists minor oil contamination and delivers consistent performance without drips or spills.




| ASIN | B0053ZNMDE |
| Best Sellers Rank | #2,113 in Automotive ( See Top 100 in Automotive ) #8 in Thread Lock Sealers |
| Brand | Loctite |
| Brand Name | Loctite |
| Color | Blue |
| Compatible Material | Aluminum, Metal, Stainless Steel |
| Container Type | Stick |
| Customer Reviews | 4.8 out of 5 stars 3,643 Reviews |
| Full Cure Time | 24 hours |
| Global Trade Identification Number | 00079340376434 |
| Included Components | (1) LOCTITE 248 Blue Threadlocker Glue Stick | Blue, 9 Gram Wax Stick |
| Item Form | Stick |
| Item Package Quantity | 1 |
| Item Type Name | automotive-thread-lock-sealers |
| Item Weight | 0.27 g |
| Manufacturer | Loctite |
| Material | Aluminum , Stainless Steel |
| Material Type | Aluminum,Stainless Steel |
| Model | 37643 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Strong |
| Part Number | 506166 |
| Special Feature | Strong |
| Specific Uses For Product | Repair |
| UPC | 079340376434 |
| Unit Count | 1 Count |
| Viscosity Level | Medium |
| Volume | 9 cubic centimeters |
| Water Resistance Level | Not Water Resistant |
E**N
First Time Using the Stick Format — Never Going Back to Liquid
Having used liquid threadlocker tubes for years, switching to the Loctite Threadlocker Stick was a massive upgrade. The stick/paste format is far superior to traditional liquid tubes—it goes on smoothly like a glue stick without any messy drips, runs, or accidental spills on nearby components. It is ideal for overhead or awkward, tight-space applications where liquid usually runs down your hands or tools. It stays right where you apply it, provides a strong and reliable medium-strength hold, and keeps the toolbox completely clean. If you are tired of dealing with runny, liquid threadlockers, this stick form is well worth the switch.
M**A
Convenient Loctite Threadlocker Stick for Easy Application
This Loctite Threadlocker Stick is a game-changer when it comes to securing bolts and screws in place. It's so easy to use - just twist it up like a glue stick and apply directly to the threads. No more messy liquid dripping everywhere! The medium strength formula holds everything tight without making it impossible to remove later if needed. One thing to note is that the stick format can make it a bit tricky to reach tight spaces or apply evenly on smaller screws. However, the convenience and mess-free application definitely outweigh this minor inconvenience. Overall, if you're tired of dealing with runny liquids and want a cleaner threadlocking experience, this stick is worth a try!
P**.
The Perfect Solution for Easy and Mess-Free Application
I absolutely love my Loctite lipstick! It's like gold for mechanics, offering a convenient way to get the job done without the hassle of shaking old bottles. With this product, there's no mess or worries about it tipping over. It lasts just as long, if not longer, than the small bottles, making it perfect for those awkward jobs. Highly recommend it for anyone looking for a reliable and efficient solution.
K**K
A must
The best in stick form!
T**Y
Works great for EDC Knife scale screws.
Perfect size and amount to throw in a toolbox or like I do in my truck glove compartment. Anywhere you have threads that are subject to vibration this stuff does the trick. Put it on all my valuable Spyderco, Benchmade and Medford Knives. Been using it for about 8 years and I have yet to lose a single screw. Not even had one blackout! I’m a full time Electrician so needless to say I put my knives and parts alike through there paces. If it’s something that is going to be subject to higher temperatures I would highly recommend stepping up a strength level to maybe a “ red “ loctite product. Also keep in mind a little of this stuff goes a long way so just a dab will do for most cases. A+ overall!
L**S
Incredible Threadlocker Stick for Easy Application
This threadlocker stick is a game-changer! I love how convenient it is to use with its twist-up design, making application a breeze. The medium strength formula is perfect for securing screws and bolts without any worries about them coming loose. I've used it on various projects around the house, and it has never failed me. The 9g size is just right for keeping in my toolbox or pocket for quick fixes on the go. I highly recommend this Loctite 37643 Blue Medium Strength Threadlocker Stick to anyone who wants a reliable solution for preventing loosening and leakage. It's like having a magic wand for all my DIY needs! 🔧🧰💙
L**R
Name Brand and Recommended.
This product quietly and invisibly serves. It can be very important. I recommend using the name brand stuff. (I have no connection to the product, just experience using it.) Buy with confidence.
R**E
Solid Stick
I just recently found out by watching a Spyderco Knife video that there was a solid "Chap Stick " like Blue thread locker. This stuff is so much easier to work with for tiny screws without leaving a mess! Now hopefully it will lock threads as good!
C**N
Muy bueno y muy práctico 👍
Excelente producto. Muy buena calidad y muy práctico para sellos especiales
M**T
Works great
First time I ever buy that kind of Loctite and I love it. It’s not running like the other and half of it is on your hands. It’s nice and waxing and definitely not as messy and works just as good
L**F
Bâton rétractable très pratique
Bon produit facile à appliquer et fonction très bien
S**M
Great for 3D printer assembly, easy to use
Made the switch from conventional liquid loctite to gluestick loctite and I am impressed! Doesn't make a mess, easy to control the amount applied. Just a bit of the thread on the glue stick and no mess at all.
S**T
Much better than liquid
Super easy to use. Just like kindergarten all over, like a glue stick!
Trustpilot
4 days ago
1 week ago