Using 511 Impregnator
I applied a water-based sealant to the grout in a tub surround that I tiled in our master bath. Unfortunately, it failed quickly, despite extra applications. A friend has recommended I apply 511 Impregnator. I have a few questions:
1) Do I have to remove all of the old sealer (only 6 months old, it is by Tile Labs) before applying the impregnator? If yes, then what would I use to remove the old sealant?
2) The tile guy at Home Depot told me there was no reason for me to apply the Impregnator the the grout alone - that the sealant would not harm the tile (which is ceramic, not glazed). Is this correct? [I had applied the water-based sealant to the grout only - what a PITA! It went everywhere and was difficult to clean up.]
3) Can I use the Impregnator on the 2nd bath I'm now tiling (where I'm using 6X6 regular glazed bathroom tiles)? Same question as above, would I apply it only to the grout, or just do the entire wall of tile?
Thanks for all replies!