H.B. Fuller 20RC

H.B. Fuller 20RC is an anaerobic resin. It is the best method for retaining, locking, and sealing a wide range of metal parts. Even in the tightest fitting assemblies, voids are present, which allows for movement and potential loosening of the parts. H.B. Fuller 20RC is a tough, durable resin that fills all these voids, creating a unitized assembly that is completely resistant to shock, vibration, and extremely harsh environmental conditions. These materials cure in the absence of air and in the presence of metal. They are ideally suited for retaining cylindrical assemblies and providing shock and vibration resistance.

Chemical FamilyMethacrylates

Product Type1K (1 component) Sealant, Anaerobic Sealant, Reactive Sealant

FeaturesChemical Resistant, Corrosion Resistant, Good Gap Filling Capabilities, High Strength, High Temperature Resistance, Oil Resistant, Vibration Resistance, Water Resistant

Technical Data Sheet

Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Features and Benefits
  • Green Anaerobic Retaining Compound and Sealant
  • High Strength
  • Excellent Gap and Void Filling Capability
  • High Resistance to Heat, Corrosion, Vibrations, Water, Gases, Oils, Hydrocarbons, and Many Chemicals

Applications & Uses

Markets
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. 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.

Properties

Color
Chemical Resistance
ValueUnitsTest Method / Conditions
Room Temperature Strength (50% Water/50% Glycol, at 87°C, 1000h)80.0%
Room Temperature Strength (Unleaded gasoline, at 22°C, 1000 h)95.0%
Room Temperature Strength (Motor oil, at 125°C, 1000 h)100.0%
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
Pin/Collar Shear Strengthmin. 2000psiISO 10123
Thermal Conductivity0.1W/m.KASTM C177
Specific Heat0.3kJ/kgK
Coefficient of Thermal Expansion80.0ppm/KASTM D696
Cure Speed (at 5°C, 25% of room temperature strength)28.0h
Cure Speed (at 40°C, 25% of room temperature strength)20.0min
Cure Speed (at 40°C, 50% of room temperature strength)40.0min
Cure Speed (at 40°C, 100% of room temperature strength)15 - 72h
Cure Speed on Steel (25% of room temperature strength)1.0h
Cure Speed on Steel (50% of room temperature strength)1.5h
Cure Speed on Steel (100% of room temperature strength)12 - 72h
Cure Speed on Aluminium (25% of room temperature strength)6.0h
Cure Speed on Zinc Dichromate (25% of room temperature strength)1.0h
Cure Speed on Zinc Dichromate (50% of room temperature strength)1.5h
Cure Speed on Zinc Dichromate (100% of room temperature strength)12 - 72h
Cure Speed for 0.05mm Gap Size (25% of room temperature strength)2.0h
Cure Speed for 0.05mm Gap Size (50% of room temperature strength)2.5h
Cure Speed for 0.05mm Gap Size (100% of room temperature strength)12 - 72h
Cure Speed for 0.25mm Gap Size (25% of room temperature strength)13.0h
Cure Speed for 0.25mm Gap Size (50% of room temperature strength)20.0h
Cure Speed for 0.25mm Gap Size (100% of room temperature strength)72.0h
Technical Data
ValueUnitsTest Method / Conditions
Full Cure Conditions12 - 72h
Uncured Properties
ValueUnitsTest Method / Conditions
Set Time (Steel)12 - 72h
Flash Pointmin. 100°C
Viscosity (20RC, spindle 5, 20 rpm)8000.0cPBrookfield RVT
Specific Gravity1.1
Viscosity (20RCHV)12000.0cP

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.

Hot Strength (%RT strength, tested at temperature)

H.B. Fuller 20RC - Hot Strength (%Rt Strength, Tested At Temperature)

Storage & Handling

Shelf Life
12 Months
Storage Conditions
  • Store at 8°C to 21°C in darkness
  • Products should be stored unopened in a cool, dry place out of direct sunlight. Products should be kept at room temperature away from direct light. Protect from extreme heat or cold, do not refrigerate.