The Hawk Performance HP600 is a 500 ml bottle of DOT 4 hydraulic brake fluid. The manufacturer describes it as a premium DOT 4 fluid that is above OE spec, with a minimum dry boiling point of 572°F / 300°C and a minimum wet boiling point of 383°F / 195°C. For a buyer, the dry boiling point is the margin that keeps the pedal firm when pads and rotors run hot on repeated hard stops. The manufacturer also notes that a higher dry boiling point leads to maximum stopping power.
DOT 4 is a common factory specification, but it has a trade-off. The manufacturer explains that DOT 4 has higher boiling temperatures but needs to be changed more often due to water absorption properties, and advises following factory replacement intervals at a minimum. Silicone-based DOT 5 is a different chemistry, and the manufacturer states it is not compatible with any other brake fluid, so confirm your vehicle's required rating in the owner's manual before purchase. Owners considering this fluid for track days should pair it with a regular flush schedule to protect the hydraulic lines and ABS components.
The manufacturer lists the HP520 with a minimum dry boiling point of 500°F / 260°C, while the HP600 has a higher minimum of 572°F / 300°C. Both are DOT 4 fluids that the manufacturer describes as above OE spec.
No. The manufacturer states that DOT 5 is a silicone-based fluid and is not compatible with other brake fluids, so do not mix it with DOT 4 products like the HP600.
The manufacturer advises following factory-recommended replacement intervals at minimum when DOT 4 is the OEM fluid, because DOT 4 absorbs water over time and needs changing more often.
