Krytox GPL 207 Grease, Pure PFPE/PTFE, 0.5 oz Tube Temp Range: -30C thru 288C: Viscosity 42cSt/100C, 440cSt/40C; Stable in a wide variety of operating conditions/environments Nonflammable: Krytox Grease contains only carbon, oxygen & fluorine, (no hydrogen or silicone); Will not burn or support combustion; Passes impact standards with LOX, Nitrogen Tetroxide, Nitric Acid Chemically Inert: Resistant to oxygen and inert to most all chemicals; Inert nature allows Krytox Grease to outlast/outperform hydrocarbon products; Chemically insoluble in nearly all solvents At operating temps and pressures Krytox Grease is highly resistant to attack by gaseous and liquid oxygen; The preferred choice in oxygen; use and manufacturing industry Exposure to significant radiation causes only minor DE polymerization (8% decrease of viscosity) and no formation of solids or sludge or change in appearance