121078 Retaining Compounds

About 121078 Retaining Compounds

LOCTITE 121078 is a green, high-strength retaining compound for bonding cylindrical fitting parts, designed for applications requiring a permanent bond, particularly where strength at elevated temperatures is required. Its typically used for holding gears and sprockets onto gearbox shafts and rotors on electric motor shafts. This medium-viscosity urethane methacrylate acrylic liquid cures when confined in the absence of air between close-fitting metal surfaces. Its designed to prevent loosening and leakage due to shock and vibration. The thixotropic nature of LOCTITE 121078 makes it easy to apply and reduces sealant migration after application. It fluoresces under UV light great for quality control.

• Secondary cure (activator) available
• High-strength
• Thixotropic for ease of application
• Fluorescent under UV for quality control
• Service/operating temperature: -55C to 175C (-67F to 347F) 

Fast Curing for Industrial Cylindrical Assemblies

121078 Retaining Compounds deliver a rapid fixture time of just 3 minutes, optimizing productivity in high-demand environments. The product's superior chemistry ensures that even challenging assembly operations can proceed quickly and smoothly, reducing wait times and enhancing operational efficiency.


Thixotropic and High Viscosity for Precise Application

Formulated as a thixotropic, viscous green liquid, these retaining compounds prevent undesired spread or dripping. This allows for controlled application and minimal waste, while the viscosity range of 3000-5000 cP perfectly fills gaps up to 0.25 mm, delivering a consistent, strong lock for components.


Advanced Anaerobic Cure for Metal Surfaces

By leveraging an anaerobic curing mechanism based on methacrylate chemistry, 121078 is tailor-made for metal cylindrical surfaces. When confined and deprived of oxygen, the adhesive rapidly transitions from liquid to solid, offering remarkable strength and durability in demanding mechanical uses.