QUESTIONI have an older epoxy floor which is mostly dull looking and want to have porcelain tile installed over it.
is there a product available that may adhere to the epoxy floor and the thin set ? or hire a company to sand or grind off the epoxy?
ANSWERANSWER - There are epoxy adhesives that you can use to install the ceramic porcelain tile over a properly prepared epoxy floor.
First you have to make sure that the existing epoxy floor is well bonded to the substrate because if the epoxy ever came loose so would the tile. Assuming the epoxy coating is well bonded, then you should scarify and clean the epoxy floor to prepare it for adhering the tile to it. If the epoxy coating isn't attached well then you should remove it and then clean and scarify the concrete slab beneath it.
There are 100% epoxies like Laticrete 300 that you can use to bond the tile to the properly prepared epoxy coating, which isn't cheap. There are modified epoxies that can be used like Laticrete 210 that has a cementitious filler mixed in with the epoxy hardener and resin that is less expensive.