

🔧 Lock it down with Loctite – the pro’s choice for lasting strength!
Loctite Primerless Threadlocker 243 is a 50mL blue liquid adhesive designed for medium-strength threadlocking. Its oil-tolerant, water-resistant formula works on metal, ceramic, and plastic, curing fully in 24 hours. Featuring a clog-resistant nozzle, it ensures precise application for industrial, automotive, and general repair use.
| ASIN | B00D5W7KBM |
| Best Sellers Rank | #3,573 in Automotive ( See Top 100 in Automotive ) #14 in Thread Lock Sealers |
| Brand | Loctite |
| Brand Name | Loctite |
| Color | Blue |
| Compatible Material | Ceramic, Plastic |
| Container Type | Bottle |
| Customer Reviews | 4.7 out of 5 stars 851 Reviews |
| Full Cure Time | 24 Hours |
| Item Form | Liquid, Paste |
| Item Package Quantity | 1 |
| Item Weight | 50 Grams |
| Manufacturer | Loctite |
| Material | Metal |
| Material Type | Metal |
| Model | 1329467 |
| Other Special Features of the Product | Oil Tolerant |
| Special Feature | Oil Tolerant |
| Specific Uses For Product | Repair, General Purpose, Industrial, Vibrating Assemblies |
| UPC | 079340438972 |
| Unit Count | 1.69 Fluid Ounces |
| Viscosity | Medium |
| Volume | 50 Milliliters |
| 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.
Trustpilot
2 months ago
3 days ago