Thread lockers are anaerobic adhesives designed to prevent threaded fasteners, such as bolts and screws, from loosening due to vibration, shock, or thermal expansion. They work by filling the gaps between threads and curing in the absence of air, forming a strong bond that resists movement. Loctite offers a wide range of thread lockers tailored to different applications and strength requirements.

For general-purpose use, Loctite 243 is a reliable medium-strength thread locker that works well on most metal fasteners, including those with light oil contamination. It is suitable for applications where disassembly with standard hand tools is required. On the other hand, for high-strength applications where fasteners are unlikely to need removal, Loctite 271 is an excellent choice. This product is ideal for heavy-duty machinery and permanent assemblies.

For small screws or delicate components, Loctite 222 is a low-strength option that allows for easy adjustment or removal without damaging the fastener. It is particularly useful in electronics or precision instruments. By choosing the appropriate thread locker, you can ensure fasteners remain secure under challenging conditions.

Thread Sealant: Ensuring Leak-Free Connections

Thread sealants are designed to prevent leaks in threaded joints, particularly in systems that carry fluids or gases. These adhesives create a seal by filling the microscopic gaps between threads, preventing the escape of liquids or air. Loctite’s range of thread sealants caters to various pressures, temperatures, and chemical exposures.

For general plumbing and hydraulic applications, Loctite 567 is a popular choice. This product provides excellent sealing performance on metal threads and resists high pressures and temperatures. It is particularly effective in sealing against oils, fuels, and coolants, making it versatile for automotive and industrial use.

In situations where fast curing is necessary, Loctite 577 is a high-performance thread sealant that sets quickly and works well on both active metals, such as brass, and passive metals, such as stainless steel. Its ability to withstand vibrations and thermal cycling makes it suitable for demanding environments.

For plastic threads or applications requiring chemical resistance, Loctite 55 is a unique thread-sealing cord that offers a flexible and reliable solution. Unlike liquid sealants, it is applied as a wrap around the threads, providing a clean and effective seal without mess.

Retaining Compound: Securing Cylindrical Assemblies

Retaining compounds are used to bond cylindrical components, such as bearings, shafts, and bushings, to prevent movement or loosening during operation. These adhesives fill the gaps between mating parts, increasing friction and providing a strong, durable connection. Loctite’s retaining compounds are designed to handle high loads, extreme temperatures, and harsh environments.

For general-purpose retention, Loctite 638 is a high-strength compound that performs well on both active and passive metals. It is ideal for applications where high load-bearing capacity and resistance to dynamic forces are required. This product is commonly used in automotive and industrial machinery.

In cases where gaps between components are larger, Loctite 660 is a gap-filling retaining compound that can bridge spaces up to 0.5 mm. It is particularly useful for worn or out-of-tolerance parts, allowing them to be reused without the need for expensive repairs or replacements.

Choosing the Right Thread Sealant or Compound

When selecting an adhesive, it is essential to consider factors such as the materials being bonded, the operating environment, and the desired strength of the bond. Thread lockers, thread sealants, and retaining compounds each serve distinct purposes, and using the wrong product can lead to suboptimal performance or even failure.

Loctite’s extensive range of products provides solutions for virtually every application. By understanding the specific requirements of your project and consulting product specifications, you can choose the most suitable adhesive for the job. Additionally, proper surface preparation and application techniques are crucial to achieving the best results.

Repco are your home of quality workshop consumables

Thread lockers, thread sealants, and retaining compounds are indispensable tools for ensuring the reliability and safety of mechanical assemblies. While Repco carry a huge range of Loctite products we also offer the best from JB Weld, Permatex, Selleys and ThreeBond to ensure your repairs are durable and long standing.

When looking for adhesives, sealants, gasketing compounds and more, trust Repco to give you the widest range at the best prices.