Loctite ® Adhesives – High-Performance Industrial Bonding Solutions

LOCTITE® – Advanced Adhesives, Sealants & Industrial Maintenance Solutions

Loctite retaining compound

LOCTITE® Retaining Compounds are high-performance anaerobic adhesives designed to secure cylindrical, press-fit, and slip-fit components. They fill gaps between mating metal surfaces, prevent loosening and movement, and improve the reliability of assemblies in demanding industrial applications.

Loctite threadlockers

LOCTITE Threadlockers are high-performance adhesives designed to secure threaded fasteners, prevent loosening caused by vibration, and seal threads against leakage. Available in different strengths for easy removal, permanent assembly, and high-temperature applications.

Loctite instant adhesives

LOCTITE Instant Adhesives are fast-curing, high-strength adhesives designed for bonding a wide range of materials, including metals, plastics, rubber, and ceramics. They provide reliable, precise bonding for industrial assembly, maintenance, and repair applications.

Loctite metal repair putty

LOCTITE® Metal Repair Putty is a high-performance epoxy-based repair compound designed to rebuild, restore, and repair damaged metal surfaces. It is ideal for repairing cracks, holes, worn areas, and damaged components in industrial maintenance applications.

Loctite products - Overview

Loctite products are trusted across industries for reliable bonding, sealing, thread locking, retaining, and equipment repair. They improve assembly quality, prevent leaks and loosening caused by vibration, reduce downtime, and extend the service life of industrial machinery and components.

Loctite Applications:

• Thread locking and vibration-resistant fastening

• Bearing and shaft retention

• Flange sealing and gasket replacement

• Pipe thread sealing and leak prevention

• Instant bonding of plastics, rubber, metal, and ceramics

• Structural bonding of metals and composite materials

• Metal repair and equipment rebuilding

• Surface wear protection and corrosion resistance

• Machine maintenance and preventive repairs

• Bonding of electronic and electrical components

• Automotive assembly and repair

• Industrial machinery maintenance

• Pump, gearbox, and motor repair

• Hydraulic and pneumatic system sealing

• Manufacturing and production line assembly

• Aerospace and defense applications

• Marine equipment repair and maintenance

• Oil & gas, mining, steel, cement, and power plant maintenance

• Food processing and packaging equipment maintenance (using suitable approved products)

• General industrial MRO (Maintenance, Repair & Operations)

Loctite Instant Adhesives

Loctite 406 - Instant adhesive for Plastic and rubber bonding

LOCTITE 406 – Instant Adhesive for Plastics and Rubber

LOCTITE 406 is a fast-curing, low-viscosity instant adhesive (cyanoacrylate) specially formulated for bonding plastics, rubber and elastomeric materials. It provides rapid fixture times and strong adhesion, making it ideal for applications where speed, precision and reliable bonding are essential.

Its low viscosity allows the adhesive to flow easily into close-fitting joints and small gaps, helping create clean and effective bonds. LOCTITE 406 is particularly suitable for bonding difficult-to-assemble plastic and rubber components and is widely used in industrial assembly, maintenance, repair and manufacturing applications.

Key Features of LOCTITE 406

• Fast-curing cyanoacrylate adhesive for rapid assembly and repair.

• Excellent for plastics and rubber, including many elastomeric materials.

• Low viscosity for easy application and penetration into close-fitting joints.

• Provides high-strength bonding on suitable substrates.

• Ideal for small, precise bonding applications.

• Helps reduce assembly time and improve production efficiency.

• Suitable for bonding components where conventional mechanical fastening is impractical.

• Creates a neat bond without the need for clamps or extended curing periods.

Applications

• LOCTITE 406 is commonly used for bonding:

• Plastic components and assemblies

• Rubber and elastomeric parts

• O-rings and rubber seals

• Flexible plastic components

• Small industrial components

• Electrical and electronic components

• Automotive plastic and rubber parts

• Rubber profiles and gaskets

• Small precision components

• General industrial repair and assembly applications

How LOCTITE 406 Works

LOCTITE 406 is a cyanoacrylate adhesive that cures rapidly when confined between closely fitting surfaces. The adhesive is applied to one of the clean, dry surfaces, the components are assembled, and pressure is maintained briefly while the adhesive develops its initial bond.

For challenging substrates or applications requiring improved performance, an appropriate LOCTITE primer or activator may be considered according to the manufacturer's recommendations.

Advantages of LOCTITE 406

The combination of rapid curing and excellent adhesion to plastics and rubber makes LOCTITE 406 a practical solution for high-speed assembly operations. Its low viscosity makes it especially useful where the adhesive needs to spread easily across a close-fitting joint.

It can help manufacturers and maintenance professionals achieve fast, clean and reliable bonding while reducing dependence on mechanical fasteners and lengthy curing processes.

Industrial Uses

LOCTITE 406 can be used across a wide range of industries, including automotive, electrical and electronics, industrial equipment, rubber products, plastics manufacturing, engineering and general maintenance....

LOCTITE 480 – Toughened Instant Adhesive for Metal, Rubber and Difficult-to-Bond Materials

LOCTITE® 480 is a high-performance, black, rubber-toughened cyanoacrylate instant adhesive designed for applications requiring high impact resistance, improved flexibility, and durable bonding performance. It is particularly suitable for bonding metals, rubber, and other difficult-to-bond substrates where conventional instant adhesives may be too brittle.

Key Features

• Rubber-toughened formulation for improved impact and shock resistance.

• High-strength bonding on a wide range of substrates.

• Excellent choice for metal-to-metal and metal-to-rubber bonding.

• Provides improved resistance to vibration and dynamic loads.

• Black appearance helps provide a neat finish on dark components.

• Suitable for demanding industrial maintenance and assembly applications.

• Fast-curing formulation helps reduce assembly and production time.

• Typical Applications

LOCTITE® 480 can be used for bonding metals, rubber, plastics and other materials in applications where high durability and resistance to impact are important. Typical uses include bonding rubber components, securing metal parts, repairing industrial components, and assembling parts exposed to vibration or shock.

Why Choose LOCTITE® 480?

Its toughened formulation provides a combination of fast curing, strong adhesion and improved toughness, making LOCTITE® 480 a practical choice for demanding industrial bonding applications where reliable long-term performance is required.

LOCTITE 495 - General purpose instant adhesive

LOCTITE 495 is a fast-curing, general-purpose cyanoacrylate instant adhesive designed for quick and reliable bonding of a wide range of materials. It is a low-viscosity adhesive that provides strong bonds on close-fitting surfaces and is particularly suitable for applications where rapid assembly and high productivity are required.

LOCTITE 495 is commonly used for bonding metals, plastics, rubber, wood, ceramics and other common substrates. Its low viscosity allows it to penetrate narrow gaps and provide efficient bonding between properly prepared surfaces. The adhesive cures rapidly at room temperature when exposed to moisture present on the bonding surfaces and in the surrounding air.

Key Features

• Fast-setting cyanoacrylate instant adhesive

• Low-viscosity formulation for close-fitting parts

• Suitable for a wide range of materials

• Excellent for quick assembly and repair applications

• Room-temperature curing

• Provides strong adhesion with minimal adhesive application

• Suitable for industrial maintenance, manufacturing and general-purpose bonding

Applications

LOCTITE 495 can be used for a variety of bonding applications, including metal-to-metal, metal-to-plastic, plastic-to-plastic and rubber bonding. Typical uses include small component assembly, electrical and electronic components, rubber components, plastic parts, decorative items, instruments and general industrial repairs.

For optimum performance, surfaces should be clean, dry and free from oil, grease, dust and other contaminants. The parts should be positioned accurately before applying the adhesive because of its rapid curing characteristics.

Why Choose LOCTITE 495?

LOCTITE 495 offers a convenient solution when speed, reliable bonding and ease of application are important. Its low viscosity and rapid cure make it well suited to applications requiring quick handling and short assembly times.

LOCTITE 495 is an ideal choice for fast, dependable bonding of a broad range of materials in industrial, maintenance, repair and assembly applications.

Loctite Threadlockers

LOCTITE 242 – Medium Strength Threadlocker

LOCTITE 242 is a medium-strength, general-purpose anaerobic threadlocker designed to secure and seal threaded fasteners against loosening caused by vibration, shock, and thermal cycling. It is particularly suitable for applications where fasteners may need to be removed later using standard hand tools.

LOCTITE 242 cures when confined between close-fitting metal surfaces and in the absence of air. Once cured, it fills the microscopic gaps between mating threads, helping prevent movement, loosening, corrosion, and leakage along the threaded assembly.

Key Features

• Medium-strength threadlocking for reliable fastening and vibration resistance.

• Suitable for a wide range of nuts, bolts, screws, and threaded fasteners.

• Helps prevent loosening caused by vibration and shock.

• Provides additional protection against corrosion and thread leakage.

• Can generally be removed using standard hand tools.

• Suitable for many common metal substrates.

• Ideal for applications requiring secure fastening with the possibility of future disassembly.

• Performs well across a broad range of industrial maintenance and assembly applications.

Typical Applications

LOCTITE 242 is commonly used for securing threaded components in automotive, machinery, industrial equipment, pumps, motors, gearboxes, compressors, and general mechanical assemblies. It is especially useful where regular vibration or thermal cycling could cause conventional mechanical fastening methods to loosen.

Typical applications include:

• Bolts and nuts

• Machine screws

• Motor and pump assemblies

• Gearbox components

• Mechanical equipment

• Automotive components

• Industrial machinery

• Fasteners exposed to vibration

• General maintenance and repair assemblies

How LOCTITE 242 Works

When applied to a threaded fastener, the liquid adhesive spreads between the mating threads. After assembly, the confined adhesive cures anaerobically and forms a tough polymeric bond between the metal surfaces. This increases resistance to rotational loosening while also helping seal the threaded joint.

Advantages Over Conventional Threadlocking

Unlike mechanical locking methods such as lock washers or conventional nuts, LOCTITE 242 provides locking directly within the threaded joint. It helps maintain clamp load and reduces the risk of fastener loosening without requiring additional locking hardware.

Its medium-strength formulation provides a useful balance between secure locking and serviceability, making it a popular choice for general-purpose threaded assemblies.

Recommended Use

For best results, clean and degrease the mating threads before application. Apply LOCTITE 242 to the appropriate area of the threaded fastener, assemble the components, and allow sufficient curing time before subjecting the joint to significant load.

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

LOCTITE 242 is an excellent choice for medium-strength threadlocking where reliable vibration resistance and future disassembly are both important.

LOCTITE 242 – Medium Strength Threadlocker

LOCTITE 243 is a high-performance, medium-strength, blue threadlocking adhesive designed to secure threaded fasteners and prevent loosening caused by vibration, shock, and thermal cycling. It is a versatile anaerobic threadlocker suitable for a wide range of industrial maintenance, assembly, and repair applications.

LOCTITE 243 cures in the absence of air between close-fitting metal surfaces and provides reliable locking and sealing of threaded connections. It offers improved oil tolerance compared with conventional threadlockers, making it particularly suitable for fasteners that may have residual traces of industrial oils.

The product is ideal for applications where components may need to be dismantled using standard hand tools during servicing or maintenance. Once cured, it helps protect threaded assemblies against vibration-induced loosening, corrosion and leakage.

Key Features

• Medium-strength threadlocker for reliable fastening and easy future disassembly.

• Blue, liquid formulation that is easy to apply to threaded components.

• Excellent vibration resistance helps prevent fasteners from loosening during operation.

• Improved oil tolerance allows reliable performance on lightly contaminated surfaces.

• Seals threaded connections against leakage and helps protect against corrosion.

• Suitable for a wide range of metal fasteners and threaded assemblies.

• Particularly useful for maintenance, repair and assembly applications.

• Can generally be removed with standard hand tools, making it suitable for serviceable assemblies.

Typical Applications

LOCTITE 243 is commonly used for securing bolts, nuts, screws, studs and other threaded fasteners in applications exposed to vibration and dynamic loads. Typical applications include automotive equipment, pumps, motors, gearboxes, machinery, industrial equipment, electrical assemblies and general mechanical maintenance.

It is especially useful where regular maintenance or disassembly is required, while still providing strong resistance to loosening during normal operation.

How It Works

When applied to a threaded metal connection, LOCTITE 243 fills the microscopic gaps between mating threads. Once the fastener is assembled, the absence of air between the metal surfaces allows the anaerobic adhesive to cure and form a durable polymer that locks the threads in position.

This provides both threadlocking and sealing, helping maintain the integrity of the assembly throughout its service life.

Recommended Uses

LOCTITE 243 is a good choice when you need a dependable medium-strength threadlocker for threaded metal assemblies where vibration resistance, oil tolerance and future serviceability are important.

Product Category: Threadlocker

Strength: Medium

Typical Colour: Blue

Application: Threaded metal fasteners

Primary Benefits: Vibration resistance, thread sealing, corrosion protection and controlled disassembly

LOCTITE 270 – High-Strength Threadlocker

LOCTITE 270 is a high-strength, permanent threadlocking adhesive designed to secure threaded fasteners and prevent loosening caused by vibration, shock, and thermal cycling. It is particularly suitable for applications where a permanent assembly is required and maximum resistance to loosening is important.

LOCTITE 270 is a single-component, anaerobic adhesive that cures when confined between close-fitting metal surfaces in the absence of air. Once cured, it fills the microscopic gaps between mating threads, creating a strong bond that helps prevent fasteners from rotating or loosening during service.

Key Features

High-strength permanent threadlocking

Excellent resistance to vibration and shock

Suitable for securing large and critical threaded fasteners

Helps prevent loosening and leakage through threaded joints

Works effectively on a wide range of metal substrates

Single-component and easy to apply

Cures reliably between close-fitting metal threads

Suitable for industrial assembly and maintenance applications

Applications

LOCTITE 270 is commonly used for permanently locking threaded fasteners in machinery, automotive equipment, pumps, gearboxes, motors, industrial machinery, and other mechanical assemblies. It is suitable where disassembly is not normally required and a high level of threadlocking strength is desired.

Typical applications include bolts, nuts, studs, screws and other threaded components that are exposed to vibration or dynamic loads.

How LOCTITE 270 Works

When applied to a metal threaded assembly, LOCTITE 270 remains liquid while exposed to air. After the fastener is assembled, the adhesive becomes confined between the metal surfaces and begins to cure. The cured adhesive locks the threads together and helps prevent unwanted movement caused by vibration or operational loads.

For optimum performance, the threaded surfaces should be clean, dry and free from oil, grease and other contaminants.

Advantages

LOCTITE 270 can reduce the need for mechanical locking methods such as lock washers and split pins in suitable applications. By securing the threads throughout the engaged area, it can also help protect threaded joints against loosening and provide additional sealing against moisture and contaminants.

Because it is a high-strength threadlocker, removal after curing generally requires greater effort than medium-strength threadlocking products and may require appropriate tools and, depending on the assembly, localized heating.

Suitable Industries

LOCTITE 270 is widely applicable in:

Automotive and transportation

Industrial machinery

Pumps and compressors

Motors and gearboxes

Engineering and fabrication

Manufacturing equipment

Maintenance and repair

Heavy-duty mechanical assemblies

Product Summary

LOCTITE 270 High-Strength Threadlocker is a reliable solution for permanently securing metal threaded assemblies where resistance to vibration, shock and loosening is critical. Its high-strength anaerobic curing mechanism makes it suitable for demanding industrial applications where a secure and durable threaded connection is required.

What substrates loctite cannot bond?

Loctite adhesives are designed for a wide range of materials, but no single Loctite product bonds every substrate. Many standard Loctite instant adhesives, threadlockers, and epoxies have difficulty bonding or do not bond well to the following materials without special surface treatment or a primer:

• Polypropylene (PP)

• Polyethylene (PE)

• PTFE (Teflon®)

• Silicone rubber

• Fluoropolymers (FEP, PFA, PVDF)

• Acetal (POM/Delrin®)

• Very oily or waxy plastics

• Certain thermoplastic elastomers (TPE/TPR)

In addition, Loctite products generally should not be relied upon for:

• Bonding dirty, greasy, or contaminated surfaces without proper cleaning.

• Continuous structural bonding of highly flexible materials unless a flexible adhesive is specifically selected.

• Polyolefin plastics (PE and PP) unless used with a compatible Loctite primer or a polyolefin-specific adhesive system.

If you are working with a specific Loctite product (such as Loctite 406, 480, EA 3430, 243, or 648) and a particular substrate, I can tell you whether that combination is suitable and recommend the best alternative if it isn't.⁸

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FAQs

What is Loctite?

Loctite offers adhesives, sealants, and repair products for strong, reliable bonds.

How fast do adhesives dry?

Most Loctite instant adhesives set within seconds, perfect for quick repairs.

Are Loctite products waterproof?

Yes, many of our sealants and adhesives are designed to withstand water exposure and moisture.

Can I use threadlockers on all bolts?

Threadlockers work best on metal bolts to prevent loosening from vibration.

What surfaces do adhesives bond?

Loctite adhesives bond metals, plastics, rubber, and more for versatile use.

How do I apply repair putty correctly?

Clean the surface, knead the putty until uniform, then press firmly into the damaged area.

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