DOT 5 Wiki Information from American Department of Transport.
Widely Known DOT5 and ABS never.
DOT 5 is a silicone-based fluid and is separate from the series of DOT 2, 3, 4, 5.1. It is immiscible with water, and with other brake fluids, and must not be mixed with them. Systems can change fluid only after a complete system changeover, such as a total restoration.
It contains at least 70% by weight of a diorgano polysiloxane.
[7] Unlike polyethylene glycol based fluids, DOT 5 is
hydrophobic.
[8] 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.[
citation needed]
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.
[9]