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3M™ Scotch-Weld™ Threadlocker TL71, Red, One-Component Anaerobic Adhesives

Item No: TL71
Manufacturer: 3M™ Scotch-Weld™
Technologies: Dimethacrylate
Color: Red
Cure Type: Anaerobic
Package Size: 10 ml, 50 ml, 250 ml
Shelf Life: 18 months

Product Description

3M™ Scotch-Weld™ Threadlocker TL71 is a high-strength, low-viscosity, one-component anaerobic adhesive designed to lock and seal threaded fasteners. It cures in the absence of air between close-fitting metal surfaces, providing excellent resistance to vibration, corrosion, and shock. This adhesive is ideal for applications requiring permanent locking, where disassembly is not intended.


Key Features

  • High Strength: Provides permanent locking of threaded fasteners.
  • Prevents Corrosion: Completely fills and seals threads to prevent rust and leaks.
  • Eliminates Need for Lock Washers: Offers a reliable alternative to traditional mechanical locking components.
  • Fast Curing: Cures quickly upon assembly; handling strength achieved in approximately 17 minutes.
  • Temperature Resistance: Withstands continuous exposure to temperatures ranging from -54°C to 204°C (-65°F to 400°F).

Recommended Applications

  • Threadlocking of screws, bolts, and nuts in various assemblies.
  • Securing fasteners in applications subject to vibration, such as machinery and equipment.
  • Sealing threaded components to prevent leakage and corrosion.
  • Permanent locking applications where disassembly is not required.

Technical Data

Typical Uncured Physical Properties

Attribute Name Value
Color Red¹
Viscosity 400 – 900 cP²
Chemistry Dimethacrylate
Fixture Time 17 min (average), range: 10–30 min³

¹ Color may vary from nearly white to yellow/amber; performance is not affected.
² Measured using Brookfield Viscometer spindle #2 at 20 rpm.
³ Reference ISO 10964.


Typical Cured Characteristics

Attribute Name Value
Cured Color Red
Temperature Resistance (Long-Term) -54°C to 204°C (-65°F to 400°F)

Typical Performance Characteristics

Attribute Name Test Method Value
Breakaway Torque ISO 10964 225 in-lb (≥150 in-lb range)¹
Prevailing Torque 345 in-lb (≥204 in-lb range)¹

¹ Reference ISO 10964. To convert in-lb to N·m, divide by 8.851.

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