when you think of it whatever they use has to have some longevity to it.I copied below off an asbestos webpage from 2023
Historically, drum and disc brakes were manufactured with 35% to 60% asbestos. Today, it remains legal in the U.S. to sell asbestos-containing auto parts, and many brake and clutch parts continue to contain up to 35% asbestos.
IMHO anything they use to make it work would be bad for you.