

🔧 Lock it down clean and fast — the pro’s secret weapon!
Loctite 37643 Blue Medium Strength Threadlocker Stick is a 9g wax-like adhesive stick designed for reliable, medium-strength thread locking on metals including stainless steel and aluminum. Its drip-proof applicator enables mess-free use, especially in overhead or tight spaces. The formula cures quickly—initial set in 10 minutes and full strength in 24 hours—while tolerating minor oil contamination. Ideal for automotive repairs on bolts and nuts from 6mm to 19mm, it balances strong holding power with easy removability, making it a top choice for professionals seeking efficient, clean, and dependable thread locking.




| ASIN | B0053ZNMDE |
| Best Sellers Rank | #1,836 in Automotive ( See Top 100 in Automotive ) #8 in Thread Lock Sealers |
| Brand | Loctite |
| Color | Blue |
| Customer Reviews | 4.8 4.8 out of 5 stars (3,954) |
| Date First Available | July 7, 2004 |
| Full Cure Time | 24 Hours |
| Global Trade Identification Number | 00079340376434 |
| Is Discontinued By Manufacturer | No |
| Item Form | Stick |
| Item Package Quantity | 1 |
| Item Volume | 9 Cubic Centimeters |
| Item Weight | 0.96 ounces |
| Item model number | 37643 |
| Manufacturer | Loctite |
| Manufacturer Part Number | 506166 |
| Material | Aluminum,Stainless Steel |
| Number of Pieces | 1 |
| OEM Part Number | 37643 |
| Package Information | Tube |
| Product Dimensions | 3.5 x 0.75 x 0.75 inches |
| Special Feature | Strong |
| Special Features | Strong |
| Specific Uses For Product | Repair |
| UPC | 079340376434 |
| Unit Count | 1.0 Count |
| Viscosity | [AI] Medium |
| Viscosity Level | Medium |
| Water Resistance Level | Not Water Resistant |
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.
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! 🔧🧰💙
M**O
Excellent
Use on scope mounting screws Works well Easy to put on screws
A**S
Better than the liquid form
Liquid Loctite in my experience has been a waste of time to use. It is too thin and not good for keeping fasteners tight on various power tools used on the job. Most of the stores in my area only sell the liquid form. I am glad to see the stick form available on here.
D**.
Better than cheap knockoffs
No mess. Easy to use. The right amount of hold
A**R
Very easy and clean to apply
Excellent product
A**M
Worked as it should have
Perfect for what I need, seems of good quality.
K**K
When working above my head, this is my choice for thread lock, works as expected and does not leak all over.
S**E
Un tiempo estuve batallando con los tornillos de mis navajas , con tan solo un poco de loctite, quedan exelente y no se aflojan .
L**F
Bon produit facile à appliquer et fonction très bien
A**W
Excellent! less messy than the liquid and seems to perform equally well
Y**U
bon