

🔧 Lock it down with Loctite – the pro’s choice for lasting hold!
Loctite Primerless Threadlocker 243 is a medium-strength, blue liquid adhesive designed to secure threaded fasteners reliably. Featuring a clog-resistant nozzle and oil-tolerant, water-resistant formula, it cures fully in 24 hours and is ideal for industrial, automotive, and general repair applications. Packaged in a compact 50mL bottle, it offers professional-grade performance for millennial managers who demand efficiency and durability in their toolkit.
| ASIN | B00D5W7KBM |
| Best Sellers Rank | #3,172 in Automotive ( See Top 100 in Automotive ) #14 in Thread Lock Sealers |
| Brand | Loctite |
| Color | Blue |
| Date First Available | May 26, 2012 |
| Full Cure Time | 24 Hours |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid, Paste |
| Item Package Quantity | 1 |
| Item Volume | 50 Milliliters |
| Item Weight | 1.76 ounces |
| Item model number | 1329467 |
| Manufacturer | Loctite |
| Material | Metal |
| Number of Pieces | 1 |
| Package Information | Bottle |
| Product Dimensions | 1.22 x 2.6 x 6.9 inches |
| Special Feature | Oil Tolerant |
| Specific Uses For Product | Repair, General Purpose, Industrial, Vibrating Assemblies |
| UPC | 079340438972 |
| Unit Count | 1.69 Fluid Ounces |
| Viscosity | Medium |
| Viscosity Level | Medium |
| Water Resistance Level | Water Resistant |
E**H
Great bottle and nozzle
Nozzle is a great design to prevent clogging. Locktite isn’t like glue which will dry in open air space so it’s not even a problem but it’s still nice. Always been ready to go and apply for the months I’ve had it.
N**Y
Good Product
Seems to be genuine Loctite. On the bottle is states "For sale in India only". I'm in the US, so have no idea what that is all about.
M**L
Best product
Loctite products are excellent thread sealants
C**2
Cannot find what you need locally? Remember to check Amazon!
I have used this product many times over a period of 40+ years of my career as an automobile mechanic and then a mechanic on construction equipment. It has a proven track record and never failed as a reliable thread locker. However, I wanted to purchase a large bottle of the product but locally it was only sold in tiny tubes. I checked and found that Amazon had exactly what I wanted and I placed my order.
A**Y
Good value who gives a hoot what market it’s for?
Good value, I couldn’t care less if it’s for the Indian market or for the Somalian… so long as it works.
C**S
as advertised, will probably last me forever
i didn't want a tiny bottle that would run out quickly or easily get lost, but i failed to consider how large this bottle is. its a great size to keep in my tool cart and find easily, but the container size makes it a little less convenient for my small/medium projects or to keep in a roadside kit. apart from my poor planning, the product of course works great and always has. now, i've got no excuse to skip the loctite step for the next 10 years or so.
M**K
The original is the best
The original is the best
W**I
The best.
Gold standard. Have used it for years. Made in 04/2025. Ordered 09/2025. Expries 10/2026.
A**R
Excellent product
K**A
Large quantity
T**N
It's great.
K**N
Good
C**Q
The bottle it comes in is huge, but it's less than half filled which makes sense given that it's only supposed to be 50ml. I dunno what's going on with the weird packaging but it the stuff inside seems legit and the price is excellent. I also have no way to confirm it's actually 50ml inside but eyeballing it, it seems about right to me.
Trustpilot
2 weeks ago
1 month ago