LOCTITE 243 Threadlocker provides superior adhesion, providing up to 26Nm of holding force on threads, even when properly tightened. It is particularly effective in preventing screws from loosening or coming off, even when equipment is subjected to strong vibrations, such as on moving vehicles.
LOCTITE 243 will begin to cure after a minimum of 10 minutes after application to the screw or bolt surface. For maximum strength and effectiveness, allow 24 hours for complete cure. LOCTITE 243 has excellent heat resistance, remaining stable at temperatures up to 300°F (150°C) without liquefaction, ensuring long-lasting durability and performance.

Distinguishing about Loctite threadlocker
Loctite glue is divided into 4 types with different colors, suitable for each specific application.
- Green: Used for small screws such as those in laptops, eyeglasses, or carburetor adjustment screws.
- Purple: Suitable for watches and wearable electronic devices, ensuring a secure lock and easy installation and removal.
- Blue: The most popular type, helps increase 26NM grip force on the thread, preventing the screw from coming loose when the vehicle vibrates.
- Red: The strongest type, used for important parts of heavy duty machinery.
General introduction to Loctite 243
Loctite 243 is one of the widely used thread locking products thanks to its outstanding features and high durability. This product is designed to firmly fix screw surfaces, helping the device maintain long-term operation without worrying about being disassembled during use.
Loctite 243 uses Acrylic technology with the main chemical component being Dimethacrylate ester, creating a blue liquid with medium viscosity. When exposed to an anaerobic environment, the glue quickly solidifies, providing strength to the bonds.
This product is especially suitable for bolts and screws with diameters from ¼” to 3/4” (M6 to M20), with medium locking force. The removal force/resistance when removing is measured at 180/62 lb.in. (20/7 Nm), meeting the needs of use in many industrial and civil applications.
Specifications
Specifications | Detail |
---|---|
Application | Anti-rotation positioning for bolts and screws up to M36 diameter |
Locking force | Medium |
Hardening Time / Full Hardening | 10 min / 20 min |
Disassembly force / Disassembly resistance | 26 Nm |
Continuous working temperature | -55ºC to +180ºC |
Specifications – Product code | 50ml Bottle or 250ml Bottle |
Outstanding advantages of Loctite 243
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Prevent loosening and unwanted movement:
Loctite 243 glue helps to firmly fix joints, minimizing loose threads during use. -
Prevent leaks:
The product creates a perfect seal on threads, effectively preventing gas or liquid leakage. -
Protection against corrosion:
Loctite 243 enhances the strength of joints by protecting them from the effects of corrosion and oxidation. -
Anti-shake:
The product helps maintain stability of joints, even under conditions of strong vibration or high pressure. -
Ensure safe clamping:
The adhesive holds the clamp load steady, protecting machine parts from loosening or misalignment. -
Clean and easy to use:
With its clean powder composition, Loctite 243 is easily applied without causing contamination or affecting the surrounding environment. -
Flexible application:
The adhesive can be used on a wide range of thread sizes, reducing storage costs as there is no need to diversify adhesive products. -
Effective thread sealing:
Loctite 243 allows use on through and blind holes, helping to ensure tightness on all threaded surfaces.