Loctite 542 Thread Sealant -50ml

LOCTITE 542 is a one-component, medium-strength, fast-curing anaerobic thread sealant designed for locking and sealing fine-threaded metal pipes and fittings. It is particularly suited to hydraulic, pneumatic and general-purpose fittings, where reliable sealing against fluids and resistance to vibration-related loosening are required.

LOCTITE 542 cures when confined between close-fitting metal surfaces in the absence of air. Its thixotropic formulation helps reduce unwanted migration after application, while its sealing action provides an immediate low-pressure seal.

Key Features

One-component anaerobic thread sealant

Medium-strength formulation

Fast-curing

Designed for fine-threaded metal pipes and fittings

Suitable for hydraulic and pneumatic systems

Provides an immediate low-pressure seal

Helps prevent leakage and vibration-related loosening

Resistant to fuel, oil, coolants and hydraulic fluids

Thixotropic formulation helps minimize liquid migration

Contains no fillers or particles that could clog fluid filtration systems

Brown in colour

Operating temperature range: -55°C to +150°C

DVGW and WRAS approvals listed by Henkel for specified applications

Applications

LOCTITE 542 is suitable for sealing fine-threaded metal connections in applications such as:

Hydraulic fittings

Pneumatic fittings

Hydraulic piping systems

Pneumatic piping systems

General industrial pipe fittings

Fluid filtration systems

Automotive maintenance

Industrial machinery

Fluid-power equipment

Oil and gas applications

Industrial maintenance and repair

Henkel specifically identifies LOCTITE 542 for fine threads used in hydraulic, pneumatic and general fittings.

Thread Sealing and Locking

LOCTITE 542 performs two functions in a threaded metal assembly: sealing and locking. When applied to mating threads, the anaerobic sealant cures in the confined area between the metal surfaces. This helps close the leakage path through the threads while providing resistance to loosening caused by vibration.

The product is therefore useful where a threaded connection needs both fluid sealing and additional resistance to movement.

Hydraulic and Pneumatic Applications

LOCTITE 542 is particularly suited to fine-threaded connections used in hydraulic and pneumatic systems. These systems often require dependable sealing of threaded fittings against fluids or gases.

Its resistance to hydraulic fluids, oils, fuels and coolants makes it suitable for appropriately selected industrial fluid-handling applications.

Fluid Resistance

Henkel specifies resistance to:

Fuel

Oil

Coolants

Hydraulic fluids

This makes LOCTITE 542 useful for threaded connections exposed to commonly encountered automotive and industrial fluids. Actual suitability should always be confirmed against the specific fluid, temperature and pressure conditions of the application.

Low-Pressure Sealing

LOCTITE 542 provides an instant low-pressure seal after assembly. As the product cures, it develops its sealing and locking properties within the threaded connection.

For demanding pressure applications, the assembly should be designed and tested according to the relevant equipment and system requirements.

Thixotropic Formulation

The thixotropic nature of LOCTITE 542 helps minimize unwanted movement of the liquid after it has been applied to the component. This is useful when applying the product to threaded fittings before assembly.

Technical Specifications

Property

LOCTITE 542

Product type - Thread sealant

Technology - Acrylate

Cure technology - Anaerobic

Components - 1-part

Strength - Medium

Colour - Brown

Viscosity at 20 RPM - Approx. 600 mPa·s (cP)

Breakaway torque, steel M10 - Approx. 15 N·m

Operating temperature: -55°C to +150°C

Application - Fine-threaded metal pipes and fittings

Main applications - Hydraulic, pneumatic and general fittings

Fluid resistance - Fuel, oil, coolants and hydraulic fluids

Low-pressure seal - Immediate

Approvals listed by Henkel - DVGW, WRAS

Technical values are based on Henkel's published product information and may vary depending on test conditions and product packaging.

How to Use LOCTITE 542

Clean the threads thoroughly and remove oil, grease, dirt and other contaminants.

Ensure the mating threads are dry and properly prepared.

Apply LOCTITE 542 evenly to the appropriate threaded area.

Assemble the fitting to the required position.

Allow the product to cure before subjecting the connection to demanding service conditions.

Follow the manufacturer's technical documentation for application-specific requirements.

Suitable Materials

LOCTITE 542 is intended for metal threaded pipes and fittings, particularly fine-threaded connections. For stainless steel, plated metals or other relatively inactive metal surfaces, cure behaviour can differ from that on active metals, so the manufacturer's application guidance should be followed.

Industrial Applications

LOCTITE 542 is relevant to several industrial sectors, including:

Automotive: hydraulic and pneumatic fittings and maintenance applications.

Industrial Maintenance: sealing threaded connections during equipment repair and maintenance.

Fluid Power: hydraulic and pneumatic equipment and fittings.

Industrial Manufacturing: threaded fluid connections and assemblies.

Oil & Gas: selected threaded metal connections where the product's chemical and temperature resistance are appropriate.

Henkel lists automotive aftermarket, industrial maintenance and repair, oil and gas, industrial manufacturing and fluid power among the related market segments for LOCTITE 542.

Packaging

Henkel lists LOCTITE 542 in 50 ml and 250 ml bottles on its current India product page. Other regional packaging options may be available.

Why Choose LOCTITE 542?

LOCTITE 542 combines thread sealing, medium-strength locking, fast curing and resistance to commonly encountered fluids in a single anaerobic product. Its fine-thread application makes it particularly useful for hydraulic, pneumatic and general metal fittings where leakage prevention is important.

LOCTITE 542 – Fast-curing medium-strength thread sealant for fine-threaded hydraulic, pneumatic and industrial fittings.