H.B. Fuller 173

H.B. Fuller 173 is a general-purpose hydraulic sealant suitable for fittings up to ¾ inch in diameter. It is ideal for fine threads and is a low viscosity, medium-strength thread and pipe sealant. It has a low viscosity for improved flow and coverage, and it offers excellent chemical and vibration resistance.

Product Type: 1K (1 component) Sealant, Anaerobic Sealant, Thread Sealant

Application Area: Appliances, Pipe Fittings, Pipes, Thread, Thread Sealing

Chemical Family: Methacrylates

Features: Chemical Resistant, Improved Fluidity, Low Viscosity, Vibration Resistance

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Applications & Uses

Cure Method
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.
  • This product is not recommended for use in pure oxygen environments and/or oxygen-rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials. It is recommended to confirm compatibility of the product with all substrates prior to use.
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.


Physical Form
Brown liquid
Cured Properties
ValueUnitsTest Method / Conditions
Breakaway Torque12 - 16N-mISO 10964
Prevailing Torque18 - 24N-mISO 10964
Service Temperature- 55 - 150°C-
Pin/Collar Shear Strength8 - 12MPaISO 10123
Uncured Properties
ValueUnitsTest Method / Conditions
Functional Strength1 - 3h-
Flash Pointmin. 100°C-
Handling Strength10 - 20min-
Specific Gravity1.06--
Full Cure Conditions5 - 10h-

Packaging & Availability

Regional Availability
  • Latin America
  • North America

Storage & Handling

Storage Condition

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.