<P> Unlike polyethylene glycol based fluids, Dot 5 is hydrophobic . An advantage over other forms of brake fluid is that silicone has a more stable viscosity index over a wider temperature range . Another property is that it does not damage paint . </P> <P> DOT 5 brake fluid is not compatible with anti-lock braking systems . DOT 5 fluid can aerate when the anti-lock brake system is activated . DOT 5 brake fluid absorbs a small amount of air requiring care when bleeding the system of air . </P> <P> Minimal boiling points for these specifications are as follows (wet boiling point defined as 3.7% water by volume): </P> <Table> Boiling point ranges <Tr> <Th> </Th> <Th> Dry boiling point </Th> <Th> Wet boiling point </Th> </Tr> <Tr> <Td> DOT 3 </Td> <Td> 205 ° C (401 ° F) </Td> <Td> 140 ° C (284 ° F) </Td> </Tr> <Tr> <Td> DOT 4 </Td> <Td> 230 ° C (446 ° F) </Td> <Td> 155 ° C (311 ° F) </Td> </Tr> <Tr> <Td> DOT 5 </Td> <Td> 260 ° C (500 ° F) </Td> <Td> 180 ° C (356 ° F) </Td> </Tr> <Tr> <Td> DOT 5.1 </Td> <Td> 260 ° C (500 ° F) </Td> <Td> 180 ° C (356 ° F) </Td> </Tr> </Table>

When did dot 5 brake fluid come out