Specialty Oils

Syncon® Barrier Oil

Gear Oil GP

Phillips 66® Syncon® Barrier Oil is a premium quality, non-reactive, synthetic, low-viscosity process oil developed for use as a barrier oil. Typical applications include seal service in refineries, gas plants, steel mills, power plants and chemical plants.

Syncon® Barrier Oil


• Premium quality seal oil

• Outstanding oxidation resistance and thermal stability at high temperatures

• Superior heat transfer properties

• Excellent low-temperature fluidity

• Resistant to chemical contamination

• Helps keep the face of the seal cool and free of deposits

• Low odor


• Seal applications in gas processing and pumping

• Barrier fluid in dual mechanical seals used in refineries, power plants, and chemical plants, where the manufacturer calls for a premium quality PAO seal oil