APP Brake Fluid Extreme is a DOT 4 motor vehicle brake fluid, engineered to optimize brake system performance at high operating temperatures. In addition to guarding against boiling and subsequent loss of efficiency at severe racing temperatures, APP Brake Fluid maintains its excellent viscosity, lubricity and noncompressibility.

• Typical dry boiling point 328°C (622°F). Extremely high for
  maximum safety.
• Typical wet boiling point 206°C (404 °F).
• Maintains excellent lubricity and non-compressibility.
• Optimal viscosity.
• Product conforms to and exceeds the current specification : FMVSS 116 DOT 4. ISO 4925 and SAE J 1703 and J1704.
• Special metal container provides 25 percent longer shelf life than typical plastic bottles.
• Avoid mixing APP Brake Fluid 660 Extreme with other brake fluids, otherwise its outstanding performance may be compromised.
• Not suitable for vehicles requiring a mineral based fluid (LHM). If in
  doubt consult vehicle handbook.