3M™ Scotch-Weld™ Threadlocker TL77 is a permanent, high strength, high viscosity threadlocker designed to work well with larger diameter (up to 1-1/2 inch) and coarse threaded parts. It provides vibration, corrosion and shock resistance to these fasteners in assembled form. This high strength anaerobic adhesive is dispensed as a one-component product.
Permanently fills and seals threads completely to help stop corrosion, rust and leaks
Fixture time can be as little as 20 minutes and fully cures in 24 hours to help reduce lengthy downtime during maintenance schedules
Can be disassembled with localized heat
Securely holds dissimilar and coarse metals, including up to 1-1/2 inch diameter bolts
Reduces maintenance downtime associated with parts loosening because of movement or vibration and helps keep equipment and production up and running
Harden, Lock and Seal Threads
3M™ Scotch-Weld™ Threadlocker TL77 hardens and seals threaded assemblies in order to damp vibration and prevent loosening or leakage of secured fasteners, particularly coarse and larger threaded parts up to 1-1/2 inch diameter. When applied to fasteners, this red colored, high viscosity threadlocker helps seal out moisture and prevents corrosion. With just a targeted squeeze of the bottle application is fast and easy. The anaerobic formulation begins to cure quickly into a polymer that seals, secures, and retains. This high- strength adhesive is permanent, though it can be disassembled with localized heat of approximately 490°F/254°C. Depending on the base fastener materials fixture time can be as little as 20 minutes. This adhesive will fully cure in 24 hours.
Permanently bonding larger diameter (up to 1-1/2 inch) and coarse threaded parts
Commonly used in the appliance, construction, general industrial, MRO, specialty vehicle and transportation industries
What are Anaerobic Adhesives?
Anaerobic adhesives are uniquely formulated to cure in the absence of oxygen. The term "anaerobic" means "living without air" and when the oxygen is excluded, a chemical chain reaction begins that causes the adhesive to polymerize. Contact with metal speeds the polymerization process and rapidly accelerates the curing process, forming tough cross-linked plastic that provides aggressive adhesion with effective shear strength. More commonly referred to as threadlockers, thread sealants, retaining materials and flange sealants, these adhesives are often used to enhance the seal, or holding force, in the threads of joined fastener systems such as nut-and-bolt assemblies. A nut-and-bolt assembly may have as little as 15% metal-to-metal contact and even a small amount of anaerobic adhesive readily fills any air voids between the threads and then hardens to a thermoset plastic. These unique, high-viscosity adhesives are easy-to-dispense, cure rapidly, and provide effective torque strength while resisting temperature and vibration and sealing out moisture and gasses to protect against corrosion. Anaerobic adhesives can decrease manufacturing costs, enhance equipment reliability, minimize aftermarket breakdown, and reduce warranty claims.
Breakaway Torque Strength
220 to 350 Pound
24 Hours @ 72 F (22 C)
Transportation, Specialty Vehicle, Construction, Military & Government, General Industrial, MRO, Appliance