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>Spray brake cleaner on hot brakes and you're pretty much instantly dead.

brake cleaner is bad -- i'm not here to dispute that -- but i've witnessed quick-lube/inspection mechanics spraying brake cleaner onto hot brakes for 20+ years, both in shops i've worked in personally and in shops i've witnessed as a customer.

Oil-lube guys routinely work on very hot just-off-the-highway cars. Brake inspections are often a required element of such jobs, and there are few better ways to spray the brake dust off of calipers/drums/disc-hats/suspension components in a hurry than sprayable brake cleaners, as horrible as they are. Not only is the solvent and kinetic action of the spray itself useful, but the wetting action towards the brake dust prevents aerosolizing the brake dust for everyone in the shop.

I have never witnessed a death on-site.

I have no doubts that what you say about instant death is true in some laboratory environment or closed conditions, but it doesn't really correspond to practical reality.

The reality is that these folks go home, create a family, live their life , and then die at an early age from a chronic illness that is brought about by the conditions.

That's why these practices continue unabated; people aren't dying instantaneously from exposure, they're dying from the pernicious long term exposure effects.



I wouldn't be surprised if the wanton use of brake cleaner you describe was using the non-chlorinated variety. Both exist, e.g.:

https://www.amazon.com/CRC-05089-BRAKLEEN-Brake-Cleaner/dp/B... vs https://www.amazon.com/CRC-05089-BRAKLEEN-Brake-Cleaner/dp/B...


I note that this and the Nulon brand that I’ve used list TETRAchloroethylene rather than trichloroethylene as a constituent. I wonder if that’s any safer. The Wikipedia page[0] says it has been described as a possible "neurotoxicant, liver and kidney toxicant, and reproductive and developmental toxicant ... a 'potential occupational carcinogen'"

[0] https://en.m.wikipedia.org/wiki/Tetrachloroethylene


That stuff is real good for getting stains out of clothes




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