3M™ Scotch-Weld™ Threadlocker TL72 provides vibration, corrosion, and shock resistance for fasteners after tightening. Our a high-strength anaerobic adhesive is dispensed as a one-component product before assembly.
Locks and seals bolts and studs up to 1 inch and under high-temperature conditions
Fills and seals threads completely to help stop corrosion, rust, and leaks
Helps maintain torque
High viscosity prevents dripping and migrating after assembly
Helps keeps equipment and production up and running
3M™ Scotch-Weld™ Threadlocker TL72 is a permanent threadlocker that hardens and seals threaded assemblies with high strength retention to dampen vibration and prevent loosening or leakage of secured fasteners. Applying this adhesive to fasteners before tightening seals out moisture and prevents corrosion. Application is fast and easy with just a targeted squeeze of the bottle. The anaerobic formulation begins to cure quickly into a polymer that seals, secures, and retains. It can be used for high temperature threadlocking (intermittently up to 450 degrees F) and its high viscosity prevents dripping or migration of the liquid adhesive after assembly. Scotch-Weld Threadlocker TL72 is effective for locking, vibration dampening, threadlocking, sealing, adhering, gluing, and bonding. Places where it is useful include machine tool access bolts, and hydraulic system bolts, gear box/driveshaft bolts, bearing cover cap screws, countersunk screws, and conveyor roller bolts. Tested Military Specification: MIL-S-46163A.
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 percent 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
180 to 330 Pound
24 Hours @ 72 F (22 C)
Transportation, Specialty Vehicle, Construction, Military & Government, General Industrial, MRO, Appliance