General Purpose (GPL)
DuPont™ Krytox® GPL 100–107 oils are clear, colorless, fluorinated synthetic oils that are nonreactive, nonflammable, safe in chemical and oxygen service, and are long-lasting. DuPont™ Krytox® is a perfluoropolyether (PFPE)—also called perfluoroalkylether (PFAE) or perfluoropolyalkylether (PFPAE) The polymer chain is completely saturated and contains only carbon, oxygen, and fluorine. On a weight basis, a typical Krytox® oil contains 21.6% carbon, 9.4% oxygen, and 69.0% fluorine.
All standard grades of grease are thickened with polytetrafluoroethylene (PTFE), whose formula is (CF2-CF2)n. This special high efficiency thickener has a melting point of 325 °C (617 °F) and has low molecular weight and sub-micron (0.2 m) particle size for higher performance in bearings.
GPL 200–207: white buttery greases with all of the same properties as the GPL 100–107 oils that they are made from, but they are in grease form.
GPL 210–217 EP: black greases that contain 5% molybdenum disulfide added as an extreme pressure additive for highly loaded gears and bearings.
GPL 220–227: anticorrosion greases are white greases that contain 2% sodium nitrite. These grades provide rust protection at ambient temperatures, corrosion protection at high temperatures, and antiwear protection
The grease additives may alter the chemical resistance of the grease. The standard grease consistency is NLGI grade 2 penetration (265–295). Softer or harder NLGI penetration grades can be made by special order. Special nonmelting XHT grades are available for applications that are higher than the 325 °C (617 °F) melting point of the standard PTFE thickener.