Loctite 242 - Threadlocker - 250ml

LOCTITE 242 is a blue, medium-strength threadlocking adhesive designed to secure threaded fasteners and prevent loosening caused by vibration, shock, and thermal cycling. It is suitable for general-purpose industrial maintenance and assembly applications where the fastener may need to be removed later using standard hand tools.

LOCTITE 242 cures when confined between close-fitting metal surfaces in the absence of air. It fills the clearance between mating threads, helping prevent unwanted movement, leakage and corrosion while maintaining the integrity of the threaded connection.

Key Features

Medium-strength threadlocker

Blue-colored formulation for easy identification

Helps prevent loosening from vibration and shock

Suitable for general industrial applications

Provides sealing of threaded connections against leakage and corrosion

Suitable for a wide range of metal fasteners

Removable with normal hand tools under typical conditions

Ideal for bolts, nuts, screws and other threaded fasteners

Typical Applications

LOCTITE 242 is commonly used for securing threaded fasteners in machinery, automotive equipment, pumps, motors, gearboxes, industrial assemblies and maintenance applications. It is particularly useful where regular servicing or disassembly may be required.

How LOCTITE 242 Works

After application to the threaded fastener, LOCTITE 242 fills the microscopic gaps between the mating threads. Once assembled, the adhesive cures in the confined space between the metal surfaces, creating a strong bond that resists vibration-induced loosening.

Application Method

Clean and degrease the threads to remove oil, grease and contaminants.

Apply LOCTITE 242 to the appropriate area of the male thread.

Assemble the fastener and tighten to the required torque.

Allow sufficient curing time before exposing the assembly to full service conditions.

For oily or contaminated surfaces, surface preparation or a suitable primer/cleaner may be required depending on the application.

Why Choose LOCTITE 242?

LOCTITE 242 is a versatile choice when you need reliable vibration resistance with serviceable, removable threaded connections. Its medium-strength performance makes it suitable for many maintenance and assembly applications where a permanent high-strength threadlocker is not necessary.