LOCTITE® 242® Blue Medium-Strength Threadlocker 50ml

LOCTITE 242 Threadlocker is a blue, medium-strength, medium-viscosity anaerobic adhesive designed for securing threaded metal fasteners. It is formulated for applications where reliable thread locking is required while still allowing normal disassembly with standard hand tools.

The 50 ml bottle is suitable for professional workshops, maintenance departments, machinery assembly, automotive applications and industrial repair operations.

Henkel describes LOCTITE 242 as a general-purpose threadlocker with medium strength, medium viscosity and thixotropic characteristics. It is designed for metal thread sizes up to M36.

LOCTITE 242 Threadlocker for Metal Fasteners

LOCTITE 242 Threadlocker is designed to prevent threaded fasteners from loosening during service. When applied between closely fitting metal threads, the anaerobic adhesive cures when air is excluded from the joint.

The resulting cured material helps secure the threaded connection against loosening caused by vibration and operating conditions.

Because LOCTITE 242 is a medium-strength formulation, it is particularly useful for assemblies that may need to be serviced, adjusted or disassembled later.

Blue Medium-Strength Threadlocker

LOCTITE 242 has a distinctive blue color and is classified by Henkel as a medium-strength threadlocker.

The medium-strength formulation provides a balance between secure fastening and serviceability. Unlike permanent high-strength threadlockers, LOCTITE 242 is intended for applications where fasteners may need to be removed using standard hand tools.

This makes it suitable for maintenance-intensive machinery and mechanical assemblies.

Thixotropic Formulation

An important characteristic of LOCTITE 242 Threadlocker is its thixotropic formulation.

The product has a medium viscosity of approximately 800–1,600 mPa·s (cP) at 25°C. Its thixotropic behavior helps prevent the liquid adhesive from migrating away from the application area after it has been applied to the threaded assembly.

This characteristic can make application more controlled and convenient during assembly.

Anaerobic Curing Technology

LOCTITE 242 uses an anaerobic curing process. The liquid remains workable while exposed to air but cures when confined between closely fitting metal surfaces.

The product is based on methacrylate chemistry and uses acrylate technology with anaerobic cure.

Because it is a one-component adhesive, there is no requirement to mix separate components before application.

Fast Fixture

Henkel specifies a fixture time of approximately 5–20 minutes, depending on application conditions.

Actual fixture time can vary according to factors such as temperature, substrate material, surface condition, thread size and joint clearance. For critical assemblies, users should follow the latest Henkel technical documentation and recommended curing conditions.

Suitable for Threads up to M36

The LOCTITE 242 Threadlocker is designed for metal thread sizes up to M36.

It can be used on metal substrates including:

• Brass
• Steel
• Stainless steel

This makes LOCTITE 242 suitable for a wide range of mechanical fastening applications.

Automotive and Machinery Applications

LOCTITE 242 Threadlocker can be used in many applications where threaded fasteners need additional resistance to loosening.

Typical applications include:

• Automotive maintenance
• Machinery assembly
• Industrial equipment
• Pumps
• Gearboxes
• Mechanical assemblies
• Electrical machinery
• Fabrication equipment
• Maintenance and repair
• General industrial fastening

Its medium-strength characteristics make it useful where fasteners must remain secure during operation but still need to be removable during maintenance.

50ml Bottle

This product is supplied in a 50 ml bottle configuration.

Henkel’s current product documentation lists LOCTITE 242 in a 50 ml bottle as an official packaging option. The India product page also identifies the 50 ml configuration.

The 50 ml size is convenient for workshops and maintenance teams that require a professional quantity without moving to a larger 250 ml package.

Why Choose LOCTITE 242?

LOCTITE 242 Threadlocker combines medium locking strength with a thixotropic formulation and serviceable disassembly.

Its blue color makes product identification straightforward, while its anaerobic curing technology provides reliable locking of suitable metal threaded assemblies.

The product is particularly appropriate when the application requires a threadlocker that secures fasteners during operation but does not permanently lock the assembly.

LOCTITE 242 vs. LOCTITE 243

LOCTITE 242 and LOCTITE 243 are both blue, medium-strength threadlockers, but they should not automatically be treated as identical products.

LOCTITE 242 is specifically described by Henkel as a medium-strength, medium-viscosity, thixotropic threadlocker for metal threads up to M36. LOCTITE 243 has different formulation characteristics and is marketed with additional oil-tolerance and primerless performance features.

Choose the product according to the application, substrate, surface condition and manufacturer’s technical recommendations.

Buy LOCTITE 242 Threadlocker 50ml

If you require LOCTITE 242 Threadlocker 50ml for automotive, machinery, maintenance or industrial fastening applications, verify the thread size, substrate and required strength before use.

For industrial procurement, bulk requirements and commercial enquiries, contact Technosteer Online for availability and quotation.