Invert Emulsion Type Fire-Resistant Hydraulic Fluid

Phillips 66®Quintolubric 958-30 is an invert emulsion (water-in-oil) fire-resistant hydraulic fluid designed for use in hydraulic systems operating in areas subject to fire hazards, such as in steel mills, foundries, and mining equipment. It combines the benefits of an oil-based hydraulic fluid with the fire-resistant properties of water. It is approved by the MSHA for use in underground mining equipment.

Features & Benefits

• Fire resistant

• Protects against wear

• Protects against rust and corrosion

• Forms a stable emulsion

• Resists bacterial growth

• MSHA approved (Approval Number 30-20-2)


• Hydraulic systems subject to fire hazards

• Underground mining equipment requiring a fire-resistant, MSHA approved hydraulic fluid

• Steel mills, foundries, and manufacturing plants

Technical Details

Licenses & Approvals
Additional Details
Specific Gravity @ 60°F0.948
Density, lbs/gal @ 60°F7.9
Appearance, VisualOpaque White to Tan
Flash Point (COC), °C (°F)N/A (1)
Pour Point, °C (°F)-23 (-10)
cSt @ 50°F374
cSt @ 100°F90
Viscosity Index135
Freeze-Thaw Stability, 10 Cycles, Water Separation, %None
Water Content, vol %~45