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Hope suggest using Hunter silicone lubricant (SC960) when assembling pistons, etc, on their (DOT 5.1) hydraulic brakes. It is supposed to be easily available but it took me a while to find some at a sensible price.

I noticed that überlube advertise that their silicone lubricant can be used for other purposes (such as defrizzing hair and for anti-chafing in sports). This made me wonder: Would that kind of silicone lube (ie. überlube, Pjur, Astroglide, etc) be safe to use around these other hydraulics?


As an aside, red rubber grease is often recommended and I certainly see some advertised as DOT safe. The ones I've found look to be around NLGI 2 consistency. From the Hope video, the Hunter lube looks to be like NLGI 0 or 00. Should I be able to find red rubber grease in a similar consistency?

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    I flagged this as spam, but now I am not sure is. Why would you, the correct fluid is cheap and easy to get.
    – mattnz
    Apr 19, 2022 at 3:54
  • @mattnz Simple curiosity. If one can replace hydraulic fluid with baby oil, maybe one kind of silicone lube is just as good as another?
    – jhnc
    Apr 19, 2022 at 4:44
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    Use the recommended stuff on brakes for safety's sake. Other lube may be OK for a squeaking saddle.
    – Carel
    Apr 19, 2022 at 6:36
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    @Criggie My girlfriend didn't think much of the idea of using it for her hair either... Note that SC967 is a spray so maybe has different composition to SC960. And for more confusion, it's not obvious that the UK Angelwax's "clay bar lubricant" whose COSSH sheet you linked is the same as the lube from the US company I linked in my question.
    – jhnc
    Apr 19, 2022 at 18:00
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    wikipedia tells me that dimethicone/polydimethylsiloxane/PDMS is common to both intimate and industrial lubes.
    – jhnc
    Apr 19, 2022 at 18:54

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