Halocarbon 25-5S is a silica-thickened polychlorotrifluoroethylene grease designed for use with powerful oxidizers and other aggressive chemicals. It is the ideal lubricant for valves, seals and gears in both liquid and gaseous oxygen, chlorine, 90% hydrogen peroxide, 100% nitric acid, red fuming nitric acid, other oxidizers and other aggressive chemical services. The silica is subject to attack by hydrogen fluoride and related fluorine containing compounds. In these services, a polymer-thickened greases such as Halocarbon 25-10M grease should be used.
Halocarbon 25-5S can also be used as a laboratory stopcock grease.
Shelf life based on customer experience is considered indefinite when material is kept unopened in original containers.
Halocarbon 25-5S Grease is not recommended for use:
- With amines, including amine additives, antioxidants, etc.
- In contact with liquid fluorine or liquid chlorine trifluoride.
- With hydrogen fluoride or other silica-attacking agents.
- In contact with sodium or potassium metal.
- In contact with aluminum, magnesium and their alloys under conditions of large shear forces (in threaded connections for example).
- At temperatures above 500 F (260 C).
Consult the MSDS before use.
Typical Physical Properties
| Property | Test Method | Typical Result |
| Color | - | White |
| Penetration | ASTM D217 | 230 worked |
| Dropping Point | ASTM D127 | None |
| Oil Separation, 30 hrs/212 F | FTMS 791C-321.3 | Less than 6.3% |
| Vapor Pressure, 140 F | - | 0.1mm Hg |
| Oxidation | ASTM D942 | No drop in pressure |
| Corrosion-copper, 24 hrs/212 F | ASTM D130 | 2c max |
| Load Wear Index | ASTM D2596 | 200 |
| Water Washout | ASTM 1264 | Less than 2.7% |
| Service Temperature | - | 0 - 350 F |
We believe the information given here to be correct. However, we cannot guarantee its accuracy or be responsible for loss or damage that result from the use of such information. Nothing stated herein is intended to be construed as a recommendation to infringe any patents.
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