Threadlockers lock and seal your threaded assemblies, protecting against vibration, corrosion, and galling. But depending on your need, you have to choose the right threadlocker and consider strength, form, and removability. Which one will you need? LOCTITE® makes your choice easy.
Find Threadlockers
Our products are available in many different grades to cater to a broad array of industrial applications, from new products such as power tools to a wide range of in-plant repairs. These different threadlocker types are color-coded to help you distinguish one threadlocker type from another. Visit our e-Catalog to explore all the different types of threadlockers available.
A Simple Air Gap Causes Mechanical Fastener Methods to Fail
Mechanical locking devices (such as split ring washers, nylon insert nuts, and serrated tooth washers) play central roles in most industry. They were invented to solve the common problem of loosening that happens in most threaded assemblies. However, they don’t really “lock” the assemblies and can’t maintain clamp load. Traditional locking methods only have 15% metal-to-metal contact, leaving a sizeable air gap in the assembly. Due to this air gap, they often loosen under vibration, thermal expansion, bending, and/or improper torque.
LOCTITE® Threadlockers Are the Answer
LOCTITE® threadlockers provide the ideal, dependable, and long-term way of ensuring threaded fasteners remain fixed and secure. Applied between two mating threads, liquid threadlocker adhesives secure nuts, bolts, and threaded fasteners in place. They cure to form a strong bond that prevents loosening, ensuring assemblies retain clamp load over time.
LOCTITE® threadlockers come in a variety of different formulations ranging in low, medium, and high strengths, temperature resistance, and primerless solutions. They come in easy-to-dispense liquids and non-running semi-solid sticks.
Medium-strength Application
Medium-strength applications are those that require disassembly with standard hand tools without heat on ¼” to ¾” (6mm to 22mm) fasteners for easier service and maintenance. The majority of threadlocker applications fall under this category. These applications are covered by LOCTITE® blue threadlocker medium strength adhesives.
High-strength Application
High-strength applications are those that require the highest strength possible on ¼” to ¾” (6mm to 22mm) fasteners. LOCTITE® red threadlocker high-strength adhesives cure in 24 hours on most applications, and are available in liquid and semi-solid stick forms. For removal, it may require localized heat (>550°F/260°C) and then disassembly with hand tools while still hot.
Low-strength Application
Low-strength applications are those with fasteners less than ¼” (6mm) and require removal for service and maintenance without the use of heat for disassembly. These applications are best served by LOCTITE® purple threadlocker, also known as LOCTITE® 222MS. This low-strength threadlocker cures in 24 hours and can be used on metals such as aluminum and brass.
Pre-assembled Application
For preassembled fasteners, such as electrical connectors and set screws, LOCTITE® low viscosity green threadlocker is recommended. It prevents against loosening, rust, and corrosion. This wicking grade threadlocker is categorized as a medium-to-high-strength adhesive. LOCTITE® green wicking threadlocker cures in 24 hours and can be removed with hand tools and, in rare instances, may require heat to assist when threads have excessive engagement lengths.
Pre-applied Solutions
Henkel's range of LOCTITE® pre-applied threadlocker coatings replaces traditional sealants and adhesives, offering threadlocking and sealing benefits. These dry-to-touch coatings are customizable, with various strengths, temperature resistances, and colors for easy identification. They cater to high-volume automotive applications and are environmentally sustainable. The pre-applied coatings eliminate the need for additional sealants during assembly and allow for reusability.
Automotive Aftermarket Solutions
Loctite thread locking solutions for the automotive aftermarket secure critical fasteners, preventing loosening due to vibration and ensuring reliable assembly. These solutions enhance safety, reduce maintenance, and increase the longevity of vehicle components, providing dependable performance across a range of automotive applications.
