Prevents Nuts and Bolts from Loosening with Vibration
Our 3M Scotch-Weld Threadlocker TL71 hardens and seals threaded assemblies to resist 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. An activator can be used for even faster cure or larger gap sizes. The high strength adhesive is only removable through high heat application.
Recommended Applications
- Threadlocking of screws, bolts and nuts
- Applications vary by temperature resistance, removability and oil tolerance
Eliminates the Need for Lock Washers and Other Locking Components
Our 3M Scotch-Weld Threadlocker TL71 is effective for locking, vibration resistance, sealing, and bonding threaded assemblies. Places where it is useful include machine tool access bolts, hydraulic system bolts, gear box/driveshaft bolts, bearing cover cap screws, countersunk screws and conveyor roller bolts.
Understanding 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, pipe sealants, retaining compounds, and gasket makers, 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 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.

Dynabrade 52289 .7 hp 7 Degree Offset Die Grinder, Front Exhaust, Short Shank, 18,000 RPM, 1/4" Collet
Dynabrade 61450 Raptor Vac Electric Portable Vacuum System, 5 Gallon, 120 V
Dynabrade 92777 4" W x 50' L 40 Micron Diamond Microfinishing Film DynaCut Roll
Dynabrade 79971 6" Dia. x 120 Grit Vacuum Hook-Face DynaCut Disc, 100/Box
Dynabrade 53037 1/4" Drill, .5 HP, Front Exhaust, 20,000 RPM
Dynabrade 78764 2" Dia. x 2" W x 1/4" Shank, Medium, NWN DynaBrite Wheel, 10/pack
Dynabrade X62V 6" (152mm) Dia. Central-Vacuum Dynorbital Extreme Random Orbital Sander, .3 HP, 12,000 RPM, 3/32" Orbit, Hook-Face
Dynabrade 94891 - 1-1/4" (32 mm) Vacuum Hose
3M 20227, Scotch-Seal Metal Sealant 2084, Silver, 5 oz Tube, 7000046343, 36/Case
Dynabrade 95544 Gear Grease, 2.5oz. Tube
Dynabrade 900 8" Dia. Two-Hand Gear-Driven Sander, Non-Vacuum, .25 HP, 800 RPM, 3/16" Orbit, PSA
Dynabrade 78484 3" Dia. x 1", 1/4-20 Female Center Thread, A/O, 180 Grit, 10-Ply J-DynaCut Cross Pad, 100/pack
Dynabrade 52936 1/4" Drill, .4 HP, Rear Exhaust, 20,000 RPM
Dynabrade 84856 3" x 4" Ultra Fine Foam, Extreme Orange, 24 per pack
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 31600 Dynascaler Surface Preparation Tool, Floor, 3", Rear Exhaust, 1,650 RPM
Dynabrade 10844 DynaPen Reciprocating Tool Filer Kit, 14,000 SPM, 1/8" Collet
Dynabrade 91723 DynaMesh 5" 600 Grit Hook & Loop Discs, 50 per box
Dynabrade 82576 1/4" W x 24" L 80 Grit Ceramic DynaCut Belt, 50/pack
Dynabrade 58456 5" (127 mm) Dia. Dynabuffer Random Orbital Polisher
Dynabrade 15300 Dynafile III Abrasive Belt Tool
Dynabrade 11638 Contact Wheel Ass'y, 4" Dia. x 1/2" W x 5/8" I.D., Severly Face, 70 Duro Rubber Radiused
Dynabrade 15030 Contact Arm Assembly, 5/16" Dia. x 3/8" W, Steel Wheel, with 1/2" W Platen
Dynabrade 48203 .4 hp Straight-Line Die Grinder, Rear Exhaust, 30,000 RPM, 1/4" Collet
Dynabrade 82495 6" Dia. x 400 Grit A/O Vacuum PSA Filmbac DynaCut Disc, 100/Pack
Dynabrade 93918 3/4" x 3-48 Female Center Thread, Very Fine, Dynabrite Surface Conditioning Eyelet Star, 50/pack
Dynabrade 98220 Motor Tune-Up Kit
Dynabrade 92740 2" W x 150' L 30 Micron A/O Lapping Film DynaCut Roll
Dynabrade 64206 33" (84 cm) W x 60" (152 cm) L Downdraft Sanding Table, 230 V (AC)
3M 05137, Scotch-Brite EXL Deburring Wheel, XL-WL, 9S Fine, 10 in x 1 in x 5 in, 7000046072 
