H.B. Fuller 71TL

H.B. Fuller 71TL is a high-strength, red anaerobic adhesive for locking and sealing of studs, nuts, bolts, and threaded fasteners that does not require dismantling. It is highly resistant to heat, corrosion, vibrations, water, gasses, oils, hydrocarbons, and many chemicals. Permanent adhesion may require heat to disassemble. It has a lower viscosity for improved coverage of smaller threaded areas.

Product Type1K (1 component) Adhesive, Anaerobic Adhesive

Application AreaBolts, Thread

Chemical FamilyDimethacrylate Ester

FeaturesChemical Resistant, Corrosion Resistant, Heat Resistance, Hydrocarbon Resistant, Medium Viscosity, Oil Resistant, Thixotropic, Vibration Resistance, Water Resistant

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Features and Benefits
  • High Strength
  • Highly Resistant to Heat, Corrosion, and Vibrations
  • Highly Resistant to Water, Gases, Oils, Hydrocarbons, and Many Chemicals
  • Prevents Fasteners from Loosening
  • Prevents Rust and Corrosion

Applications & Uses

Application Area
General Instructions

Surfaces to be bonded should be clean and dry and free of grease. Product should be applied in enough quantity to fill all engaged threads or gap. The product performs best in thin bond gaps. Very large gaps may create gaps that will affect the cure speed and overall strength. Good contact is essential. Flanges should tightened as soon as possible after assembly to avoid shimming. It is recommended to confirm compatibility of the product with all substrates prior to use. This product is not recommended for use with strong oxidizing materials. Where aqueous washing systems are used to clean the surfaces before bonding, these aqueous washes can affect the cure and performance of the adhesive. This product is not normally recommended for use on plastics, users must check compatibility of the product with such substrates.


Chemical Resistance
ValueUnitsTest Method / Conditions
Room Temperature Strength (50% Water/50% Glycol, at 87°C, 1000h)85.0%
Room Temperature Strength (Unleaded gasoline, at 22°C, 1000 h)95.0%
Room Temperature Strength (Motor oil, at 125°C, 1000 h)75.0%
Room Temperature Strength (Brake fluid, at 22°C, 1000h)100.0%
Room Temperature Strength (Acetone, at 22°C, 1000h)95.0%
Cured Properties
ValueUnitsTest Method / Conditions
Service Temperature- 55 - 150°C
Breakaway Torque17 - 40N-mISO 10964
Prevailing Torque23 - 40N-mISO 10964
Coefficient of Thermal Expansion80.0ppm/KASTM D696
Cure Speed (at 5°C, 25% of room temperature strength)5.0h
Cure Speed (at 5°C, 50% of room temperature strength)10.0h
Cure Speed (at 5°C, 100% of room temperature strength)24.0h
Cure Speed (at 40°C, 50% of room temperature strength)25.0min
Cure Speed (at 40°C, 100% of room temperature strength)1 - 24h
Cure Speed on Steel (25% of room temperature strength)15.0min
Cure Speed on Steel (50% of room temperature strength)40.0min
Cure Speed on Steel (100% of room temperature strength)24.0h
Cure Speed on Brass (25% of room temperature strength)20 - 24min
Cure Speed on Zinc Dichromate (25% of room temperature strength)15.0min
Cure Speed on Zinc Dichromate (50% of room temperature strength)40.0min
Cure Speed on Zinc Dichromate (100% of room temperature strength)24.0h
Uncured Properties
ValueUnitsTest Method / Conditions
Set Time (Steel)24.0h
Gap Fillmax. 0.05mm
Flash Pointmin. 93°C
Viscosity400 - 600cP
Specific Gravity1.1

MIL-S- 46163, Type 1, Grade K

Technical Details & Test Data

Curing Performance
  • The rate of cure will depend on environmental conditions and the substrates used. The gap of the bond line will affect set speed. Smaller gaps tend to increase set speed. Activators may be applied to further improve set speed, but may also impair overall adhesive performance.
  • Full cure condition: 24 at room temperature, or 40°C bondline temperature for 1 hour - achieve 100% of strength on steel
Hot Strength (%RT strength, tested at temperature)

H.B. Fuller 71TL - Hot Strength (%Rt Strength, Tested At Temperature)

Storage & Handling

Shelf Life
12 Months
Storage Conditions
  • Storage Temperature: 8 to 28°C.
  • Products should be stored unopened in a cool, dry place out of direct sunlight. Products may be refrigerated for improved shelf life, but should be brought back to room temperature before use.