Perfect for aggressive reagents such as oxygen and red fuming nitric acid!
Chlorofluorocarbon thickened with silica
Excellent for o-ring seals or glass joints subjected to oxidizing and strong acidic processes that do not react with silica
NOTE: We do not recommend Halovac for use with caustic solutions, hydrofluoric acid, gaseous fluorine, or halogen fluorides. Before using 25-5S in any process known to react with silica, please test it thoroughly.
Vapor Pressure (Torr)
230 worked (ASTM D217-48 test)
350°F (ASTM D566-42 test)
Oil Separation (FTMS 791-321)
30 Hours @ 212°F: < 6.3% (FTMS 791-321.1)
(Norma-Hoffman)300 Hours: No drop in pressure (ASTM D942-47)
Mean Hertz Load (kg)
100 kg (Shell E.P. Tester)
< 2.7% (FTMS 791-3252.2 test)
All dimensions listed below, unless otherwise stated, are in grams.