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.

You are currently viewing SYNCON® BARRIER OIL

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

  • ISO Grade: 32
  • Licenses & Approvals


    Additional Details

    ISO Grade 32
    Specific Gravity @ 60°F 0.827
    Density, lbs/gal @ 60°F 6.89
    Color, ASTM D1500 0.5
    Flash Point (COC), °C (°F), ASTM D92 238 (460)
    Pour Point, °C (°F), ASTM D97 -61 (-78)
    Viscosity, ASTM D445
    cSt @ 40°C 30.5
    cSt @ 100°C 5.9
    Viscosity Index, ASTM D2270 141
    Acid Number, mg KOH/g, ASTM D974 0.37
    Copper Corrosion, 48 hrs @ 80°C, ASTM D130 1a
    Demulsibility, minutes to pass, ASTM D1401 10
    Foam Test, Seq. I, mL, ASTM D892 0/0
    Four-Ball Wear Test, Scar Diameter, mm, ASTM D4172 0.40
    Rust Test, ASTM D665 AA&B Pass
  • ISO Grade: 5
  • Licenses & Approvals


    Additional Details

    ISO Grade 5
    Specific Gravity @ 60°F 0.797
    Density, lbs/gal @ 60°F 6.64
    Color, ASTM D1500 0.5
    Flash Point (COC), °C (°F) 149 (300)
    Pour Point, °C (°F) -60 (-76)
    cSt @ 40°C 5.1
    cSt @ 100°C 1.7
    Viscosity Index N/A
    Acid Number, ASTM D974, mg KOH/g 0.17
    Copper Corrosion, ASTM D130, 48 hrs @ 80°C 1a
    Demulsibility, ASTM D1401, minutes to pass 10
    Foam Test, ASTM D892, Seq. I, mL 0/0
    Four-Ball Wear Test, ASTM D4172, Scar Diameter, mm 0.55
    Rust Test, ASTM D665 A&B Pass
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