H.B. Fuller 145

H.B. Fuller 145 is a one-component liquid sealant specifically designed for locking and sealing high-pressure fluid power systems. It is an anaerobic sealant that can be heat-cured as a secondary measure. This sealant has a controlled flow viscosity and will not cause filter contamination.

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

Application Area: Appliances, High Pressure Applications, Pipe Fittings, Pipes, Thread Sealing

Chemical Family: Methacrylate Ester

Features: Corrosion Resistant

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Ready-to-Use Product Features

Applications & Uses

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.


Physical Form
Purple liquid
Cured Properties
ValueUnitsTest Method / Conditions
Service Temperature- 50 - 175°C-
Thermal Conductivity0.1W/m.KASTM C177
Specific Heat0.3kJ/kgK-
Coefficient of Thermal Expansion0.1ppm/KASTM D696
Uncured Properties
ValueUnitsTest Method / Conditions
Full Cure Conditions24.0h-
Flash Pointmin. 93°C-
Viscosity (Spindle 3)10000.0cPBrookfield
Specific Gravity1.02--

Packaging & Availability

Regional Availability
  • Latin America
  • North America
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.

Storage & Handling

Shelf Life
12 Months
Storage Condition
  • 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.