Syncon®Barrier Oil

Synthetic PAO-Based Fluid

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.

Features & Benefits

• 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

Technical Details

Licenses & Approvals
Additional Details
ISO Grade: 32
Specific Gravity @ 60°F0.827
Density, lbs/gal @ 60°F6.89
Color, ASTM D15000.5
Flash Point (COC), °C (°F), ASTM D92238 (460)
Pour Point, °C (°F), ASTM D97-61 (-78)
Viscosity, ASTM D445
cSt @ 40°C30.5
cSt @ 100°C5.9
Viscosity Index, ASTM D2270141
Acid Number, mg KOH/g, ASTM D9740.37
Copper Corrosion, 48 hrs @ 80°C, ASTM D1301a
Demulsibility, minutes to pass, ASTM D140110
Foam Test, Seq. I, mL, ASTM D8920/0
Four-Ball Wear Test, Scar Diameter, mm, ASTM D41720.40
Rust Test, ASTM D665 AA&BPass