Select Your Region
High performance aircraft and industrial parts assembly grease.
Royco® HF-825 is a high-quality aviation performance fluid, engineered with a synthetic diester for enhanced lubrication performance. Royco® HF-825 is a concentrated solution & specially designed to facilitate assembly of small complex parts, designed with a high “tack” to allow parts to temporarily remain in place while being assembled.
Royco® HF-825 is a versatile O-Ring lubricant that allows for "wetting out" and safe installation without concern of chafing or tearing elastomer O-rings. Royco® HF-825 can also be utilized as a viscosity index improver for many lubricating oils.
Kinematic Viscosity, cSt (@ 100°F): 2,900
Kinematic Viscosity, cSt (@ 210°F): 350
Flash Point: 420°F (215°C)
Fire Point : 475°F (246°C)
Specific Gravity: 0.912
Density (at 60°F): 7.60 lbs/gal
Gravity (API): 23.6
Acid Number, mg KOH/g: 0.2
Stay-in-place tacky lubricity for "stick-hold" assembly
Ashless technology leaves zero-deposit or coke formation
O-ring Protection & Compatability
Broad Lubricant Versatility
Damage or Tearing to O-rings from Incompatible Lubricants
Metal Containing Tackifiers or Deposit Build Up from Ash
Lubricant & Sealing Chemistry Incompatibility
Royco® HF-825 is used as an assembly aid to "stick-hold" parts during multi-piece systems.
Royco® HF-825 can also be used to lubricate and wet-out O-rings prior to installation.
Your document download will begin shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Thank you for your inquiry and interest in ChemPoint.
We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Thank you for your inquiry and interest in ChemPoint.
We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
The document currently is provided in the following languages from the supplier at this time.
The document currently is provided in the following languages from the supplier at this time.
We’ve detected that you are located in a different region than the region selected on the website. Would you like to change your region?
Current Region: English - Canada