What can I safely mix this brake fluid with?

[repenttokyo]

http://www.hrpworld.com/index.cfm?form_prod_id=680,587_606&action=product

Castrol SRF. DOT4 compliant.

[DanDombrowski]

The silicon ester technology in Castrol SRF addresses this problem in two ways. Firstly, Castrol SRF is less hygroscopic than conventional brake fluids - it absorbs less water in a given time. Secondly, unlike conventional glycol ether fluids, Castrol SRF reacts chemically with the absorbed water to reduce its adverse effects, thus preventing the fluid's high temperature performance and safety margins from deteriorating as rapidly as they would otherwise do.

NOTE: DO NOT MIX CASTROL SRF WITH OTHER BRAKE FLUIDS

Looks like its silicon based.

[repenttokyo]

Since it's a DOT4 fluid, I didn't think it was compatible with any silicon fluids - those are DOT5...

[DanDombrowski]

I'm pretty sure that the DOT4 classification is only related to dry and wet boiling points of the fluid, not its chemical makeup. A DOT5 fluid exceeds requirements of a DOT4 fluid, but that doesn't mean it can be mixed.

I think the labeling is pretty clear that this is a silicon based fluid and should not be mixed with glycol based fluids.

[repenttokyo]

I'm pretty sure that the DOT4 classification is only related to dry and wet boiling points of the fluid, not its chemical makeup. A DOT5 fluid exceeds requirements of a DOT4 fluid, but that doesn't mean it can be mixed.

I think the labeling is pretty clear that this is a silicon based fluid and should not be mixed with glycol based fluids.


good point. typically though, DOT4 are glycol based, and DOT5 are silicon. I think DOT5.1 are glycol as well.

[ryan roopnarine]

the msds says silicon ester.

at any rate, it would break my heart to use any brake fluid priced at 80 a litre in a regular use car.

[repenttokyo]

it was a birthday gift from a friend on a CART team. don't hate a playa.

[mattyb]

chlorine?

[repenttokyo]

lol.