Ok, well have reamed out the seats in Shower in wall taps, then fitted the Hydroseal Stainless new seats. Then decided to give the 1/2 turn ceramic di ...

I tried the cone rubber type, also a nylon flat washer type

Well, i used the seating tool, got bed all cleaned up and looked good, New washer, and lasted a couple months and shower dripping again.

Had replaced the washers in the shower previously, Including cleaning up the seat in wall, but did not last long, So i am thinking trying the Hydrose ...