Marble is a natural stone that needs to breathe, and covering it with plastic (acrylic sealer) seals the pores of the stone, and eventually will cause the marble to deteriorate.
Additionally, the acrylic will always lift, or peel off, as in the case of the shower in the picture. (click on image to see detail) Also, it will be VERY slippery.
This shower floor can be restored by first stripping off the acrylic using a stripper like our Stone Stripper Combo pack which includes R55-Stripper and R55 Intensive Cleaner.
Once the old sealer is completely removed and you have fresh clean marble, it is time to apply a professional Impregnator.
For additional assistance, please contact us at firstname.lastname@example.org