Halocarbon® 25-5(S)(SI) is a chemically inert fluorinated lubricant grease designed to deliver reliable performance in aggressive chemical and thermal operating conditions. Produced as part of Halocarbons' line of reactive gas lubricants, it contains a high-quality PCTFE oil thickened with silica.
Appearance: Grease
Color: Off-white
pH: Neutral
Melting point, °C: >200
Density, g/mL @ 38°C: 1.9
Water solubility: Negligible
Decomposition temperature, °C: >200
Kinematic viscosity @ 40°C: >200
CAS No 9002-83-9;
Primary Chemistry:
Halocarbon® 25-5(S)(SI) is a chemically inert fluorinated lubricant grease designed to deliver reliable performance in aggressive chemical and thermal operating conditions.
Halocarbon® 25-5(S)(SI) is a high-performance silica-thickened polychlorotrifluoroethylene (PCTFE) grease engineered for exceptional stability, low volatility, thermal resistance, and broad material compatibility. Manufactured by Halocarbon, it is a thick-bodied grease with medium viscosity and an NLGO grade of 2 or 3, outperforming competitor lubricating fluids and offering a broad application range. As an inert, nonflammable, and nonreactive grease, it can be used in reactive applications that involve flammable, corrosive, or hazardous materials and remains compatible with oxygen, chlorine, and other reactive gases.
All Halocarbon® oils are also available with anticorrosion additives upon request at no extra charge.
Thermal stress and fluid degradation in high-temperature conditions
High volatility of traditional fluids such as hydrocarbons, silicones, etc.
Poor safety properties of other lubricants and fluids containing hazardous ingredients
Poor material compatibility of fluids with plastics, polymers, metals, or elastomers
Reduced operational efficiency from the chemical breakdown of fluids
Rust or corrosion of equipment parts
Breakdown of lubricants and fluids in reactive chemical systems
Hazardous reactions in oxygen, chlorine, or other reactive gases
Assembly lubricant
Thread sealant fluid
Valve fluid
Regulator fluid
Reactive gas service applications
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