Phenolic brake piston surface repair?

Hi everyone.

One of the phenolic pads on my metal brake piston is chipped away. I was wondering if I can sand it down flat and still use the piston or if I HAVE to replace.

I say have to because I know we should t skimp on stuff like brakes. However, a new piston is $60 and I just don’t have the cash right now. If it’s safe enough to use on the rear by sanding it flat then that’s what I will do. My impression is the phenolic has to do with resisting heat transfer. If it’s on the rear it should get way less heat than the fronts.

Thoughts?

What the hell are phenolic pads, any pics???

Maybe I wasn’t clear, the end of the piston has a wafer of phenolic material on it. The brake pads themselves are not.

It’s the brown part on top of the piston.

Ahh, remember seen this on a ZX900/1000 caliper, your wafer are an anti squeak pad.
No Need to to use them anymore with a light layer of copper grease on the backside of the brake pad

Awesome, thanks!! I appreciate it.