09-09-2019, 01:37 PM
I don't 'have a problem' with Silicone brake fluid Terry I'm merely curious to know what advantage others perceive in using it.
It is not without merit - I've already mentioned low temperature viscosity (of little practical value to most people); it has a high BP (but is not alone in that respect); it is low-maintenance and yes, may improve resistance to piston seizure if a vehicle is laid up (which factors may indeed interest 7 racers and occasional drivers). It also doesn't attack your paintwork and has a relatively high flash point. On the downside though it is a relatively poor lubricant and thus not the best pick for long-term durability; it is vulnerable to aeration leading to 'spongey' pedal feeling. And whereas glycol-based fluids absorb water, any which finds its way into a silicone system remains as isolated globules which may vaporise, cause corrosion spots, or freeze. That's why most of the motor industry sticks with glycol. It's very much 'horses for courses' and if the benefits outweigh the demerits in any specific application then I'm all for it. Not sure I'd give it a blanket recommendation for all cars though.
It is not without merit - I've already mentioned low temperature viscosity (of little practical value to most people); it has a high BP (but is not alone in that respect); it is low-maintenance and yes, may improve resistance to piston seizure if a vehicle is laid up (which factors may indeed interest 7 racers and occasional drivers). It also doesn't attack your paintwork and has a relatively high flash point. On the downside though it is a relatively poor lubricant and thus not the best pick for long-term durability; it is vulnerable to aeration leading to 'spongey' pedal feeling. And whereas glycol-based fluids absorb water, any which finds its way into a silicone system remains as isolated globules which may vaporise, cause corrosion spots, or freeze. That's why most of the motor industry sticks with glycol. It's very much 'horses for courses' and if the benefits outweigh the demerits in any specific application then I'm all for it. Not sure I'd give it a blanket recommendation for all cars though.